added feature to download the certificate and formated the code

1 files changed, 655 insertions, 700 deletions

diff --git a/editcode.inc b/editcode.inc
index 972f487..4f00e48 100755
--- a/editcode.inc
+++ b/editcode.inc
@@ -3,714 +3,669 @@
 /******************************************************************************/
 /***************************** EDIT EXAMPLE ***********************************/
 /******************************************************************************/
-function upload_examples_edit_form($form, $form_state)
-  {
-    global $user;
-    $example_id = arg(3);
-    /* get example details */
-    /*$example_q = db_query("SELECT * FROM {textbook_companion_example} WHERE id = %d LIMIT 1", $example_id);
-    $example_data = db_fetch_object($example_q);*/
-    $query = db_select('textbook_companion_example');
-    $query->fields('textbook_companion_example');
-    $query->condition('id', $example_id);
-    $query->range(0, 1);
-    $example_q = $query->execute();
-    $example_data = $example_q->fetchObject();
-    if (!$example_q)
-      {
-        drupal_set_message(t("Invalid example selected."), 'error');
-        drupal_goto('');
-        return;
-      }
-    if ($example_data->approval_status != 0)
-      {
-        drupal_set_message(t("You cannot edit an example after it has been approved or dis-approved. Please contact site administrator if you want to edit this example."), 'error');
-        drupal_goto('');
-        return;
-      }
-    /* get examples files */
-    $source_file = "";
-    $source_id = 0;
-    $result1_file = "";
-    $result1_id = 0;
-    $result2_file = "";
-    $result2_id = 0;
-    $xcos1_file = "";
-    $xcos1_id = 0;
-    $xcos2_file = "";
-    $xcos2_id = 0;
-    /*$example_files_q = db_query("SELECT * FROM {textbook_companion_example_files} WHERE example_id = %d", $example_id);*/
-    $query = db_select('textbook_companion_example_files');
-    $query->fields('textbook_companion_example_files');
-    $query->condition('example_id', $example_id);
-    $example_files_q = $query->execute();
-    while ($example_files_data = $example_files_q->fetchObject())
-      {
-        if ($example_files_data->filetype == "S")
-          {
-            $source_file = l($example_files_data->filename, 'textbook-companion/download/file/' . $example_files_data->id);
-            $source_file_id = $example_files_data->id;
-            //var_dump($source_file);die;
-          }
-      }
-    /* get chapter details */
-    /*$chapter_q = db_query("SELECT * FROM {textbook_companion_chapter} WHERE id = %d", $example_data->chapter_id);
-    $chapter_data = db_fetch_object($chapter_q);*/
-    $query = db_select('textbook_companion_chapter');
-    $query->fields('textbook_companion_chapter');
-    $query->condition('id', $example_data->chapter_id);
-    $result = $query->execute();
-    $chapter_data = $result->fetchObject();
-    if (!$chapter_data)
-      {
-        drupal_set_message(t("Invalid chapter selected."), 'error');
-        drupal_goto('');
-        return;
-      }
-    /* get preference details */
-    /*$preference_q = db_query("SELECT * FROM {textbook_companion_preference} WHERE id = %d", $chapter_data->preference_id);
-    $preference_data = db_fetch_object($preference_q);*/
-    $query = db_select('textbook_companion_preference');
-    $query->fields('textbook_companion_preference');
-    $query->condition('id', $chapter_data->preference_id);
-    $result = $query->execute();
-    $preference_data = $result->fetchObject();
-    if (!$preference_data)
-      {
-        drupal_set_message(t("Invalid book selected."), 'error');
-        drupal_goto('');
-        return;
-      }
-    if ($preference_data->approval_status != 1)
-      {
-        drupal_set_message(t("Cannot edit example. Either the book proposal has not been approved or it has been rejected."), 'error');
-        drupal_goto('');
-        return;
-      }
-    /* get proposal details */
-    /*$proposal_q = db_query("SELECT * FROM {textbook_companion_proposal} WHERE id = %d", $preference_data->proposal_id);
-    $proposal_data = db_fetch_object($proposal_q);*/
-    $query = db_select('textbook_companion_proposal');
-    $query->fields('textbook_companion_proposal');
-    $query->condition('id', $preference_data->proposal_id);
-    $result = $query->execute();
-    $proposal_data = $result->fetchObject();
-    if (!$proposal_data)
-      {
-        drupal_set_message(t("Invalid proposal selected."), 'error');
-        drupal_goto('');
-        return;
-      }
-    if ($proposal_data->uid != $user->uid)
-      {
-        drupal_set_message(t("You do not have permissions to edit this example."), 'error');
-        drupal_goto('');
-        return;
-      }
-    $user_data = user_load($proposal_data->uid);
-    $form['#redirect'] = 'textbook-companion/code';
-    $form['#attributes'] = array(
-        'enctype' => "multipart/form-data"
-    );
-    $form['book_details']['book'] = array(
-        '#type' => 'item',
-        '#markup' => $preference_data->book,
-        '#title' => t('Title of the Book')
-    );
-    $form['contributor_name'] = array(
-        '#type' => 'item',
-        '#markup' => $proposal_data->full_name,
-        '#title' => t('Contributor Name')
-    );
-    $form['number'] = array(
-        '#type' => 'item',
-        '#title' => t('Chapter No'),
-        '#markup' => $chapter_data->number
-    );
-    $form['name'] = array(
-        '#type' => 'item',
-        '#title' => t('Title of the Chapter'),
-        '#markup' => $chapter_data->name
-    );
-    $form['example_number'] = array(
-        '#type' => 'item',
-        '#title' => t('Example No'),
-        '#markup' => $example_data->number
-    );
-    $form['example_caption'] = array(
-        '#type' => 'textfield',
-        '#title' => t('Caption'),
-        '#size' => 40,
-        '#maxlength' => 255,
-        '#required' => TRUE,
-        '#default_value' => $example_data->caption
-    );
-    $form['example_warning'] = array(
-        '#type' => 'item',
-        '#title' => t('You should upload all the files (main or source files, result files, executable file if any)'),
-        '#prefix' => '<div style="color:red">',
-        '#suffix' => '</div>'
-    );
-    $form['sourcefile'] = array(
-        '#type' => 'fieldset',
-        '#title' => t('Main or Source Files'),
-        '#collapsible' => FALSE,
-        '#collapsed' => FALSE
-    );
-    if ($source_file)
-      {
-        $form['sourcefile']['cur_source'] = array(
-            '#type' => 'item',
-            '#title' => t('Existing Main or Source File'),
-            '#markup' => $source_file
-        );
-        $form['sourcefile']['cur_source_checkbox'] = array(
-            '#type' => 'checkbox',
-            '#title' => t('Delete Existing Main or Source File'),
-            '#description' => 'Check to delete the existing Main or Source file.'
-        );
-        $form['sourcefile']['sourcefile1'] = array(
-            '#type' => 'file',
-            '#title' => t('Upload New Main or Source File'),
-            '#size' => 48,
-            '#description' => t("Upload new Main or Source file above if you want to replace the existing file. Leave blank if you want to keep using the existing file. <br />") . t('Allowed file extensions : ') . variable_get('textbook_companion_source_extensions', '')
-        );
-        $form['sourcefile']['cur_source_file_id'] = array(
-            '#type' => 'hidden',
-            '#value' => $source_file_id
-        );
-      }
-    else
-      {
-        $form['sourcefile']['sourcefile1'] = array(
-            '#type' => 'file',
-            '#title' => t('Upload New Main or Source File'),
-            '#size' => 48,
-            '#description' => t('Allowed file extensions : ') . variable_get('textbook_companion_source_extensions', '')
-        );
-      }
-    $form['submit'] = array(
-        '#type' => 'submit',
-        '#value' => t('Submit')
-    );
-    $form['cancel'] = array(
-        '#type' => 'item',
-        '#markup' => l(t('Cancel'), 'textbook-companion/code')
-    );
-    return $form;
-  }
+function upload_examples_edit_form($form, &$form_state)
+{
+	global $user;
+	$example_id = arg(3);
+	/* get example details */
+	/*$example_q = db_query("SELECT * FROM {textbook_companion_example} WHERE id = %d LIMIT 1", $example_id);
+	$example_data = db_fetch_object($example_q);*/
+	$query      = db_select('textbook_companion_example');
+	$query->fields('textbook_companion_example');
+	$query->condition('id', $example_id);
+	$query->range(0, 1);
+	$example_q    = $query->execute();
+	$example_data = $example_q->fetchObject();
+	if (!$example_q) {
+		drupal_set_message(t("Invalid example selected."), 'error');
+		drupal_goto('');
+		return;
+	} //!$example_q
+	if ($example_data->approval_status != 0) {
+		drupal_set_message(t("You cannot edit an example after it has been approved or dis-approved. Please contact site administrator if you want to edit this example."), 'error');
+		drupal_goto('');
+		return;
+	} //$example_data->approval_status != 0
+	/* get examples files */
+	$source_file  = "";
+	$source_id    = 0;
+	$result1_file = "";
+	$result1_id   = 0;
+	$result2_file = "";
+	$result2_id   = 0;
+	$xcos1_file   = "";
+	$xcos1_id     = 0;
+	$xcos2_file   = "";
+	$xcos2_id     = 0;
+	/*$example_files_q = db_query("SELECT * FROM {textbook_companion_example_files} WHERE example_id = %d", $example_id);*/
+	$query        = db_select('textbook_companion_example_files');
+	$query->fields('textbook_companion_example_files');
+	$query->condition('example_id', $example_id);
+	$example_files_q = $query->execute();
+	while ($example_files_data = $example_files_q->fetchObject()) {
+		if ($example_files_data->filetype == "S") {
+			$source_file    = l($example_files_data->filename, 'textbook-companion/download/file/' . $example_files_data->id);
+			$source_file_id = $example_files_data->id;
+			//var_dump($source_file);die;
+		} //$example_files_data->filetype == "S"
+	} //$example_files_data = $example_files_q->fetchObject()
+	/* get chapter details */
+	/*$chapter_q = db_query("SELECT * FROM {textbook_companion_chapter} WHERE id = %d", $example_data->chapter_id);
+	$chapter_data = db_fetch_object($chapter_q);*/
+	$query = db_select('textbook_companion_chapter');
+	$query->fields('textbook_companion_chapter');
+	$query->condition('id', $example_data->chapter_id);
+	$result       = $query->execute();
+	$chapter_data = $result->fetchObject();
+	if (!$chapter_data) {
+		drupal_set_message(t("Invalid chapter selected."), 'error');
+		drupal_goto('');
+		return;
+	} //!$chapter_data
+	/* get preference details */
+	/*$preference_q = db_query("SELECT * FROM {textbook_companion_preference} WHERE id = %d", $chapter_data->preference_id);
+	$preference_data = db_fetch_object($preference_q);*/
+	$query = db_select('textbook_companion_preference');
+	$query->fields('textbook_companion_preference');
+	$query->condition('id', $chapter_data->preference_id);
+	$result          = $query->execute();
+	$preference_data = $result->fetchObject();
+	if (!$preference_data) {
+		drupal_set_message(t("Invalid book selected."), 'error');
+		drupal_goto('');
+		return;
+	} //!$preference_data
+	if ($preference_data->approval_status != 1) {
+		drupal_set_message(t("Cannot edit example. Either the book proposal has not been approved or it has been rejected."), 'error');
+		drupal_goto('');
+		return;
+	} //$preference_data->approval_status != 1
+	/* get proposal details */
+	/*$proposal_q = db_query("SELECT * FROM {textbook_companion_proposal} WHERE id = %d", $preference_data->proposal_id);
+	$proposal_data = db_fetch_object($proposal_q);*/
+	$query = db_select('textbook_companion_proposal');
+	$query->fields('textbook_companion_proposal');
+	$query->condition('id', $preference_data->proposal_id);
+	$result        = $query->execute();
+	$proposal_data = $result->fetchObject();
+	if (!$proposal_data) {
+		drupal_set_message(t("Invalid proposal selected."), 'error');
+		drupal_goto('');
+		return;
+	} //!$proposal_data
+	if ($proposal_data->uid != $user->uid) {
+		drupal_set_message(t("You do not have permissions to edit this example."), 'error');
+		drupal_goto('');
+		return;
+	} //$proposal_data->uid != $user->uid
+	$user_data                    = user_load($proposal_data->uid);
+	$form['#redirect']            = 'textbook-companion/code';
+	$form['#attributes']          = array(
+		'enctype' => "multipart/form-data"
+	);
+	$form['book_details']['book'] = array(
+		'#type' => 'item',
+		'#markup' => $preference_data->book,
+		'#title' => t('Title of the Book')
+	);
+	$form['contributor_name']     = array(
+		'#type' => 'item',
+		'#markup' => $proposal_data->full_name,
+		'#title' => t('Contributor Name')
+	);
+	$form['number']               = array(
+		'#type' => 'item',
+		'#title' => t('Chapter No'),
+		'#markup' => $chapter_data->number
+	);
+	$form['name']                 = array(
+		'#type' => 'item',
+		'#title' => t('Title of the Chapter'),
+		'#markup' => $chapter_data->name
+	);
+	$form['example_number']       = array(
+		'#type' => 'item',
+		'#title' => t('Example No'),
+		'#markup' => $example_data->number
+	);
+	$form['example_caption']      = array(
+		'#type' => 'textfield',
+		'#title' => t('Caption'),
+		'#size' => 40,
+		'#maxlength' => 255,
+		'#required' => TRUE,
+		'#default_value' => $example_data->caption
+	);
+	$form['example_warning']      = array(
+		'#type' => 'item',
+		'#title' => t('You should upload all the files (main or source files, result files, executable file if any)'),
+		'#prefix' => '<div style="color:red">',
+		'#suffix' => '</div>'
+	);
+	$form['sourcefile']           = array(
+		'#type' => 'fieldset',
+		'#title' => t('Main or Source Files'),
+		'#collapsible' => FALSE,
+		'#collapsed' => FALSE
+	);
+	if ($source_file) {
+		$form['sourcefile']['cur_source']          = array(
+			'#type' => 'item',
+			'#title' => t('Existing Main or Source File'),
+			'#markup' => $source_file
+		);
+		$form['sourcefile']['cur_source_checkbox'] = array(
+			'#type' => 'checkbox',
+			'#title' => t('Delete Existing Main or Source File'),
+			'#description' => 'Check to delete the existing Main or Source file.'
+		);
+		$form['sourcefile']['sourcefile1']         = array(
+			'#type' => 'file',
+			'#title' => t('Upload New Main or Source File'),
+			'#size' => 48,
+			'#description' => t("Upload new Main or Source file above if you want to replace the existing file. Leave blank if you want to keep using the existing file. <br />") . t('Allowed file extensions : ') . variable_get('textbook_companion_source_extensions', '')
+		);
+		$form['sourcefile']['cur_source_file_id']  = array(
+			'#type' => 'hidden',
+			'#value' => $source_file_id
+		);
+	} //$source_file
+	else {
+		$form['sourcefile']['sourcefile1'] = array(
+			'#type' => 'file',
+			'#title' => t('Upload New Main or Source File'),
+			'#size' => 48,
+			'#description' => t('Allowed file extensions : ') . variable_get('textbook_companion_source_extensions', '')
+		);
+	}
+	$form['submit'] = array(
+		'#type' => 'submit',
+		'#value' => t('Submit')
+	);
+	$form['cancel'] = array(
+		'#type' => 'item',
+		'#markup' => l(t('Cancel'), 'textbook-companion/code')
+	);
+	return $form;
+}
 function upload_examples_edit_form_validate($form, &$form_state)
-  {
-    if (!check_name($form_state['values']['example_caption']))
-        form_set_error('example_caption', t('Example Caption can contain only alphabets, numbers and spaces.'));
-    if (isset($_FILES['files']))
-      {
-        /* check for valid filename extensions */
-        foreach ($_FILES['files']['name'] as $file_form_name => $file_name)
-          {
-            if ($file_name)
-              {
-                /* checking file type */
-                if (strstr($file_form_name, 'source'))
-                    $file_type = 'S';
-                else if (strstr($file_form_name, 'result'))
-                    $file_type = 'R';
-                else if (strstr($file_form_name, 'xcos'))
-                    $file_type = 'X';
-                else
-                    $file_type = 'U';
-                $allowed_extensions_str = '';
-                switch ($file_type)
-                {
-                    case 'S':
-                        $allowed_extensions_str = variable_get('textbook_companion_source_extensions', '');
-                        break;
-                    case 'R':
-                        $allowed_extensions_str = variable_get('textbook_companion_result_extensions', '');
-                        break;
-                    case 'X':
-                        $allowed_extensions_str = variable_get('textbook_companion_xcos_extensions', '');
-                        break;
-                }
-                $allowed_extensions = explode(',', $allowed_extensions_str);
-                $temp_ext = explode('.', strtolower($_FILES['files']['name'][$file_form_name]));
-                $temp_extension = end($temp_ext);
-                if (!in_array($temp_extension, $allowed_extensions))
-                    form_set_error($file_form_name, t('Only file with ' . $allowed_extensions_str . ' extensions can be uploaded.'));
-                if ($_FILES['files']['size'][$file_form_name] <= 0)
-                    form_set_error($file_form_name, t('File size cannot be zero.'));
-                /* check if valid file name */
-                if (!textbook_companion_check_valid_filename($_FILES['files']['name'][$file_form_name]))
-                    form_set_error($file_form_name, t('Invalid file name specified. Only alphabets, numbers and underscore is allowed as a valid filename.'));
-              }
-          }
-      }
-    /* add javascript again for automatic book title, check if example uploaded, dependency selection effects */
-    /*$chapter_name_js = " $(document).ready(function() {
-    $('#edit-number').change(function() {
-    $.get('" . base_path() . "textbook-companion/ajax/chapter-title/' + $('#edit-number').val() + '/' + " . $row->pre_id . ", function(data) {
-    $('#edit-name').val(data);
-    });
-    });
-    $('#edit-example-number').change(function() {
-    $.get('" . base_path() . "textbook-companion/ajax/example-exists/' + $('#edit-number').val() + '/' + $('#edit-example-number').val(), function(data) {
-    if (data) {
-    alert(data);
-    }
-    });
-    });
-    $('#edit-existing-depfile-dep-book-title').change(function() {
-    
-    var dep_selected = ''; 
-    /* showing and hiding relevant files */
-    /*$('.form-checkboxes .option').hide();
-    $('.form-checkboxes .option').each(function(index) {
-    var activeClass = $('#edit-existing-depfile-dep-book-title').val();
-    if ($(this).children().hasClass(activeClass)) {
-    $(this).show();
-    }
-    if ($(this).children().attr('checked') == true) {
-    dep_selected += $(this).children().next().text() + '<br />';
-    }
-    });
-    /* showing list of already existing dependencies */
-    /* $('#existing_depfile_selected').html(dep_selected);
-    
-    });
-    
-    $('.form-checkboxes .option').change(function() {
-    $('#edit-existing-depfile-dep-book-title').trigger('change');
-    });
-    $('#edit-existing-depfile-dep-book-title').trigger('change');
-    });";
-    drupal_add_js($chapter_name_js, 'inline', 'header');*/
-  }
+{
+	if (!check_name($form_state['values']['example_caption']))
+		form_set_error('example_caption', t('Example Caption can contain only alphabets, numbers and spaces.'));
+	if (isset($_FILES['files'])) {
+		/* check for valid filename extensions */
+		foreach ($_FILES['files']['name'] as $file_form_name => $file_name) {
+			if ($file_name) {
+				/* checking file type */
+				if (strstr($file_form_name, 'source'))
+					$file_type = 'S';
+				else if (strstr($file_form_name, 'result'))
+					$file_type = 'R';
+				else if (strstr($file_form_name, 'xcos'))
+					$file_type = 'X';
+				else
+					$file_type = 'U';
+				$allowed_extensions_str = '';
+				switch ($file_type) {
+					case 'S':
+						$allowed_extensions_str = variable_get('textbook_companion_source_extensions', '');
+						break;
+					case 'R':
+						$allowed_extensions_str = variable_get('textbook_companion_result_extensions', '');
+						break;
+					case 'X':
+						$allowed_extensions_str = variable_get('textbook_companion_xcos_extensions', '');
+						break;
+				} //$file_type
+				$allowed_extensions = explode(',', $allowed_extensions_str);
+				$temp_ext           = explode('.', strtolower($_FILES['files']['name'][$file_form_name]));
+				$temp_extension     = end($temp_ext);
+				if (!in_array($temp_extension, $allowed_extensions))
+					form_set_error($file_form_name, t('Only file with ' . $allowed_extensions_str . ' extensions can be uploaded.'));
+				if ($_FILES['files']['size'][$file_form_name] <= 0)
+					form_set_error($file_form_name, t('File size cannot be zero.'));
+				/* check if valid file name */
+				if (!textbook_companion_check_valid_filename($_FILES['files']['name'][$file_form_name]))
+					form_set_error($file_form_name, t('Invalid file name specified. Only alphabets, numbers and underscore is allowed as a valid filename.'));
+			} //$file_name
+		} //$_FILES['files']['name'] as $file_form_name => $file_name
+	} //isset($_FILES['files'])
+	/* add javascript again for automatic book title, check if example uploaded, dependency selection effects */
+	/*$chapter_name_js = " $(document).ready(function() {
+	$('#edit-number').change(function() {
+	$.get('" . base_path() . "textbook-companion/ajax/chapter-title/' + $('#edit-number').val() + '/' + " . $row->pre_id . ", function(data) {
+	$('#edit-name').val(data);
+	});
+	});
+	$('#edit-example-number').change(function() {
+	$.get('" . base_path() . "textbook-companion/ajax/example-exists/' + $('#edit-number').val() + '/' + $('#edit-example-number').val(), function(data) {
+	if (data) {
+	alert(data);
+	}
+	});
+	});
+	$('#edit-existing-depfile-dep-book-title').change(function() {
+	
+	var dep_selected = ''; 
+	/* showing and hiding relevant files */
+	/*$('.form-checkboxes .option').hide();
+	$('.form-checkboxes .option').each(function(index) {
+	var activeClass = $('#edit-existing-depfile-dep-book-title').val();
+	if ($(this).children().hasClass(activeClass)) {
+	$(this).show();
+	}
+	if ($(this).children().attr('checked') == true) {
+	dep_selected += $(this).children().next().text() + '<br />';
+	}
+	});
+	/* showing list of already existing dependencies */
+	/* $('#existing_depfile_selected').html(dep_selected);
+	
+	});
+	
+	$('.form-checkboxes .option').change(function() {
+	$('#edit-existing-depfile-dep-book-title').trigger('change');
+	});
+	$('#edit-existing-depfile-dep-book-title').trigger('change');
+	});";
+	drupal_add_js($chapter_name_js, 'inline', 'header');*/
+}
 function upload_examples_edit_form_submit($form, &$form_state)
-  {
-    global $user;
-    $example_id = arg(3);
-    /* get example details */
-    /*$example_q = db_query("SELECT * FROM {textbook_companion_example} WHERE id = %d LIMIT 1", $example_id);
-    $example_data = db_fetch_object($example_q);*/
-    $query = db_select('textbook_companion_example');
-    $query->fields('textbook_companion_example');
-    $query->condition('id', $example_id);
-    $query->range(0, 1);
-    $example_q = $query->execute();
-    $example_data = $example_q->fetchObject();
-    if (!$example_q)
-      {
-        drupal_set_message(t("Invalid example selected."), 'error');
-        drupal_goto('');
-        return;
-      }
-    if ($example_data->approval_status != 0)
-      {
-        drupal_set_message(t("You cannot edit an example after it has been approved or dis-approved. Please contact site administrator if you want to edit this example."), 'error');
-        drupal_goto('');
-        return;
-      }
-    /* get chapter details */
-    /*$chapter_q = db_query("SELECT * FROM {textbook_companion_chapter} WHERE id = %d", $example_data->chapter_id);
-    $chapter_data = db_fetch_object($chapter_q);*/
-    $query = db_select('textbook_companion_chapter');
-    $query->fields('textbook_companion_chapter');
-    $query->condition('id', $example_data->chapter_id);
-    $result = $query->execute();
-    $chapter_data = $result->fetchObject();
-    if (!$chapter_data)
-      {
-        drupal_set_message(t("Invalid chapter selected."), 'error');
-        drupal_goto('');
-        return;
-      }
-    /* get preference details */
-    /*$preference_q = db_query("SELECT * FROM {textbook_companion_preference} WHERE id = %d", $chapter_data->preference_id);
-    $preference_data = db_fetch_object($preference_q);*/
-    $query = db_select('textbook_companion_preference');
-    $query->fields('textbook_companion_preference');
-    $query->condition('id', $chapter_data->preference_id);
-    $result = $query->execute();
-    $preference_data = $result->fetchObject();
-    if (!$preference_data)
-      {
-        drupal_set_message(t("Invalid book selected."), 'error');
-        drupal_goto('');
-        return;
-      }
-    if ($preference_data->approval_status != 1)
-      {
-        drupal_set_message(t("Cannot edit example. Either the book proposal has not been approved or it has been rejected."), 'error');
-        drupal_goto('');
-        return;
-      }
-    /* get proposal details */
-    /*$proposal_q = db_query("SELECT * FROM {textbook_companion_proposal} WHERE id = %d", $preference_data->proposal_id);
-    $proposal_data = db_fetch_object($proposal_q);*/
-    $query = db_select('textbook_companion_proposal');
-    $query->fields('textbook_companion_proposal');
-    $query->condition('id', $preference_data->proposal_id);
-    $result = $query->execute();
-    $proposal_data = $result->fetchObject();
-    if (!$proposal_data)
-      {
-        drupal_set_message(t("Invalid proposal selected."), 'error');
-        drupal_goto('');
-        return;
-      }
-    if ($proposal_data->uid != $user->uid)
-      {
-        drupal_set_message(t("You do not have permissions to edit this example."), 'error');
-        drupal_goto('');
-        return;
-      }
-    /* creating directories */
-    $root_path = textbook_companion_path();
-    $dest_path = $preference_data->directory_name . '/';
-    if (!is_dir($root_path . $dest_path))
-        mkdir($root_path . $dest_path);
-    $dest_path .= 'CH' . $chapter_data->number . '/';
-    if (!is_dir($root_path . $dest_path))
-        mkdir($root_path . $dest_path);
-    $dest_path .= 'EX' . $example_data->number . '/';
-    if (!is_dir($root_path . $dest_path))
-        mkdir($root_path . $dest_path);
-    $filepath = 'CH' . $chapter_data->number . '/' . 'EX' . $example_data->number . '/';
-    /* updating example caption */
-    /*db_query("UPDATE {textbook_companion_example} SET caption = '%s' WHERE id = %d", $form_state['values']['example_caption'], $example_id);*/
-    $query = db_update('textbook_companion_example');
-    $query->fields(array(
-        'caption' => $form_state['values']['example_caption']
-    ));
-    $query->condition('id', $example_id);
-    $num_updated = $query->execute();
-    /* handle source file */
-    if (isset($form_state['values']['cur_source_file_id']))
-      {
-        $cur_file_id = $form_state['values']['cur_source_file_id'];
-      }
-    else
-      {
-        $cur_file_id = isset($form_state['values']['cur_source_file_id']);
-      }
-    //var_dump($cur_file_id);die;
-    if ($cur_file_id > 0)
-      {
-        /*$file_q = db_query("SELECT * FROM  {textbook_companion_example_files} WHERE id = %d AND example_id = %d", $cur_file_id, $example_data->id);
-        $file_data = db_fetch_object($file_q);*/
-        //var_dump($cur_file_id. $example_data->id);die;
-        $query = db_select('textbook_companion_example_files');
-        $query->fields('textbook_companion_example_files');
-        $query->condition('id', $cur_file_id);
-        $query->condition('example_id', $example_data->id);
-        $result = $query->execute();
-        $file_data = $result->fetchObject();
-        if (!$file_data)
-          {
-            drupal_set_message("Error deleting example source file. File not present in database.", 'error');
-            return;
-          }
-        if (($form_state['values']['cur_source_checkbox'] == 1) && (!$_FILES['files']['name']['sourcefile1']))
-          {
-            if (!delete_file($cur_file_id))
-              {
-                drupal_set_message("Error deleting example source file.", 'error');
-                return;
-              }
-          }
-      }
-    if ($_FILES['files']['name']['sourcefile1'])
-      {
-        if ($cur_file_id > 0)
-          {
-            if (!delete_file($cur_file_id))
-              {
-                drupal_set_message("Error removing previous example source file.", 'error');
-                return;
-              }
-          }
-        if (file_exists($root_path . $dest_path . $_FILES['files']['name']['sourcefile1']))
-          {
-            drupal_set_message(t("Error uploading source file. File !filename already exists.", array(
-                '!filename' => $_FILES['files']['name']['sourcefile1']
-            )), 'error');
-            return;
-          }
-        /* uploading file */
-        if (move_uploaded_file($_FILES['files']['tmp_name']['sourcefile1'], $root_path . $dest_path . $_FILES['files']['name']['sourcefile1']))
-          {
-            /* for uploaded files making an entry in the database */
-            /*db_query("INSERT INTO {textbook_companion_example_files} (example_id, filename, filepath, filemime, filesize, filetype, timestamp)
-            VALUES (%d, '%s', '%s', '%s', %d, '%s', %d)",
-            $example_data->id,
-            $_FILES['files']['name']['sourcefile1'],
-            $dest_path . $_FILES['files']['name']['sourcefile1'],
-            $_FILES['files']['type']['sourcefile1'],
-            $_FILES['files']['size']['sourcefile1'],
-            'S',
-            time()
-            );*/
-            $query = "INSERT INTO {textbook_companion_example_files} (example_id, filename, filepath, filemime, filesize, filetype, 		timestamp) VALUES (:example_id, :filename, :filepath, :filemime, :filesize, :filetype,:timestamp)";
-            $args = array(
-                ":example_id" => $example_data->id,
-                ":filename" => $_FILES['files']['name']['sourcefile1'],
-                ":filepath" => $filepath . $_FILES['files']['name']['sourcefile1'],
-                ":filemime" => 'application/dwxml',
-                ":filesize" => $_FILES['files']['size']['sourcefile1'],
-                ":filetype" => 'S',
-                ":timestamp" => time()
-            );
-            $result = db_query($query, $args, array(
-                'return' => Database::RETURN_INSERT_ID
-            ));
-            drupal_set_message($_FILES['files']['name']['sourcefile1'] . ' uploaded successfully.', 'status');
-          }
-        else
-          {
-            drupal_set_message('Error uploading file : ' . $dest_path . '/' . $_FILES['files']['name']['sourcefile1'], 'error');
-          }
-      }
-    /* sending email */
-    $email_to = $user->mail;
-    $from = variable_get('textbook_companion_from_email', '');
-    $bcc = variable_get('textbook_companion_emails', '');
-    $cc = variable_get('textbook_companion_cc_emails', '');
-    $param['example_updated']['example_id'] = $example_id;
-    $param['example_updated']['user_id'] = $user->uid;
-    $param['example_updated']['headers'] = array(
-        'From' => $from,
-        'MIME-Version' => '1.0',
-        'Content-Type' => 'text/plain; charset=UTF-8; format=flowed; delsp=yes',
-        'Content-Transfer-Encoding' => '8Bit',
-        'X-Mailer' => 'Drupal',
-        'Cc' => $cc,
-        'Bcc' => $bcc
-    );
-    if (!drupal_mail('textbook_companion', 'example_updated', $email_to, language_default(), $param, $from, TRUE))
-        drupal_set_message('Error sending email message.', 'error');
-    drupal_set_message(t("Example successfully udpated."), 'status');
-  }
+{
+	global $user;
+	$example_id = arg(3);
+	/* get example details */
+	/*$example_q = db_query("SELECT * FROM {textbook_companion_example} WHERE id = %d LIMIT 1", $example_id);
+	$example_data = db_fetch_object($example_q);*/
+	$query      = db_select('textbook_companion_example');
+	$query->fields('textbook_companion_example');
+	$query->condition('id', $example_id);
+	$query->range(0, 1);
+	$example_q    = $query->execute();
+	$example_data = $example_q->fetchObject();
+	if (!$example_q) {
+		drupal_set_message(t("Invalid example selected."), 'error');
+		drupal_goto('');
+		return;
+	} //!$example_q
+	if ($example_data->approval_status != 0) {
+		drupal_set_message(t("You cannot edit an example after it has been approved or dis-approved. Please contact site administrator if you want to edit this example."), 'error');
+		drupal_goto('');
+		return;
+	} //$example_data->approval_status != 0
+	/* get chapter details */
+	/*$chapter_q = db_query("SELECT * FROM {textbook_companion_chapter} WHERE id = %d", $example_data->chapter_id);
+	$chapter_data = db_fetch_object($chapter_q);*/
+	$query = db_select('textbook_companion_chapter');
+	$query->fields('textbook_companion_chapter');
+	$query->condition('id', $example_data->chapter_id);
+	$result       = $query->execute();
+	$chapter_data = $result->fetchObject();
+	if (!$chapter_data) {
+		drupal_set_message(t("Invalid chapter selected."), 'error');
+		drupal_goto('');
+		return;
+	} //!$chapter_data
+	/* get preference details */
+	/*$preference_q = db_query("SELECT * FROM {textbook_companion_preference} WHERE id = %d", $chapter_data->preference_id);
+	$preference_data = db_fetch_object($preference_q);*/
+	$query = db_select('textbook_companion_preference');
+	$query->fields('textbook_companion_preference');
+	$query->condition('id', $chapter_data->preference_id);
+	$result          = $query->execute();
+	$preference_data = $result->fetchObject();
+	if (!$preference_data) {
+		drupal_set_message(t("Invalid book selected."), 'error');
+		drupal_goto('');
+		return;
+	} //!$preference_data
+	if ($preference_data->approval_status != 1) {
+		drupal_set_message(t("Cannot edit example. Either the book proposal has not been approved or it has been rejected."), 'error');
+		drupal_goto('');
+		return;
+	} //$preference_data->approval_status != 1
+	/* get proposal details */
+	/*$proposal_q = db_query("SELECT * FROM {textbook_companion_proposal} WHERE id = %d", $preference_data->proposal_id);
+	$proposal_data = db_fetch_object($proposal_q);*/
+	$query = db_select('textbook_companion_proposal');
+	$query->fields('textbook_companion_proposal');
+	$query->condition('id', $preference_data->proposal_id);
+	$result        = $query->execute();
+	$proposal_data = $result->fetchObject();
+	if (!$proposal_data) {
+		drupal_set_message(t("Invalid proposal selected."), 'error');
+		drupal_goto('');
+		return;
+	} //!$proposal_data
+	if ($proposal_data->uid != $user->uid) {
+		drupal_set_message(t("You do not have permissions to edit this example."), 'error');
+		drupal_goto('');
+		return;
+	} //$proposal_data->uid != $user->uid
+	/* creating directories */
+	$root_path = textbook_companion_path();
+	$dest_path = $preference_data->directory_name . '/';
+	if (!is_dir($root_path . $dest_path))
+		mkdir($root_path . $dest_path);
+	$dest_path .= 'CH' . $chapter_data->number . '/';
+	if (!is_dir($root_path . $dest_path))
+		mkdir($root_path . $dest_path);
+	$dest_path .= 'EX' . $example_data->number . '/';
+	if (!is_dir($root_path . $dest_path))
+		mkdir($root_path . $dest_path);
+	$filepath = 'CH' . $chapter_data->number . '/' . 'EX' . $example_data->number . '/';
+	/* updating example caption */
+	/*db_query("UPDATE {textbook_companion_example} SET caption = '%s' WHERE id = %d", $form_state['values']['example_caption'], $example_id);*/
+	$query    = db_update('textbook_companion_example');
+	$query->fields(array(
+		'caption' => $form_state['values']['example_caption']
+	));
+	$query->condition('id', $example_id);
+	$num_updated = $query->execute();
+	/* handle source file */
+	if (isset($form_state['values']['cur_source_file_id'])) {
+		$cur_file_id = $form_state['values']['cur_source_file_id'];
+	} //isset($form_state['values']['cur_source_file_id'])
+	else {
+		$cur_file_id = isset($form_state['values']['cur_source_file_id']);
+	}
+	//var_dump($cur_file_id);die;
+	if ($cur_file_id > 0) {
+		/*$file_q = db_query("SELECT * FROM  {textbook_companion_example_files} WHERE id = %d AND example_id = %d", $cur_file_id, $example_data->id);
+		$file_data = db_fetch_object($file_q);*/
+		//var_dump($cur_file_id. $example_data->id);die;
+		$query = db_select('textbook_companion_example_files');
+		$query->fields('textbook_companion_example_files');
+		$query->condition('id', $cur_file_id);
+		$query->condition('example_id', $example_data->id);
+		$result    = $query->execute();
+		$file_data = $result->fetchObject();
+		if (!$file_data) {
+			drupal_set_message("Error deleting example source file. File not present in database.", 'error');
+			return;
+		} //!$file_data
+		if (($form_state['values']['cur_source_checkbox'] == 1) && (!$_FILES['files']['name']['sourcefile1'])) {
+			if (!delete_file($cur_file_id)) {
+				drupal_set_message("Error deleting example source file.", 'error');
+				return;
+			} //!delete_file($cur_file_id)
+		} //($form_state['values']['cur_source_checkbox'] == 1) && (!$_FILES['files']['name']['sourcefile1'])
+	} //$cur_file_id > 0
+	if ($_FILES['files']['name']['sourcefile1']) {
+		if ($cur_file_id > 0) {
+			if (!delete_file($cur_file_id)) {
+				drupal_set_message("Error removing previous example source file.", 'error');
+				return;
+			} //!delete_file($cur_file_id)
+		} //$cur_file_id > 0
+		if (file_exists($root_path . $dest_path . $_FILES['files']['name']['sourcefile1'])) {
+			drupal_set_message(t("Error uploading source file. File !filename already exists.", array(
+				'!filename' => $_FILES['files']['name']['sourcefile1']
+			)), 'error');
+			return;
+		} //file_exists($root_path . $dest_path . $_FILES['files']['name']['sourcefile1'])
+		/* uploading file */
+		if (move_uploaded_file($_FILES['files']['tmp_name']['sourcefile1'], $root_path . $dest_path . $_FILES['files']['name']['sourcefile1'])) {
+			/* for uploaded files making an entry in the database */
+			/*db_query("INSERT INTO {textbook_companion_example_files} (example_id, filename, filepath, filemime, filesize, filetype, timestamp)
+			VALUES (%d, '%s', '%s', '%s', %d, '%s', %d)",
+			$example_data->id,
+			$_FILES['files']['name']['sourcefile1'],
+			$dest_path . $_FILES['files']['name']['sourcefile1'],
+			$_FILES['files']['type']['sourcefile1'],
+			$_FILES['files']['size']['sourcefile1'],
+			'S',
+			time()
+			);*/
+			$query  = "INSERT INTO {textbook_companion_example_files} (example_id, filename, filepath, filemime, filesize, filetype, 		timestamp) VALUES (:example_id, :filename, :filepath, :filemime, :filesize, :filetype,:timestamp)";
+			$args   = array(
+				":example_id" => $example_data->id,
+				":filename" => $_FILES['files']['name']['sourcefile1'],
+				":filepath" => $filepath . $_FILES['files']['name']['sourcefile1'],
+				":filemime" => 'application/dwxml',
+				":filesize" => $_FILES['files']['size']['sourcefile1'],
+				":filetype" => 'S',
+				":timestamp" => time()
+			);
+			$result = db_query($query, $args, array(
+				'return' => Database::RETURN_INSERT_ID
+			));
+			drupal_set_message($_FILES['files']['name']['sourcefile1'] . ' uploaded successfully.', 'status');
+		} //move_uploaded_file($_FILES['files']['tmp_name']['sourcefile1'], $root_path . $dest_path . $_FILES['files']['name']['sourcefile1'])
+		else {
+			drupal_set_message('Error uploading file : ' . $dest_path . '/' . $_FILES['files']['name']['sourcefile1'], 'error');
+		}
+	} //$_FILES['files']['name']['sourcefile1']
+	/* sending email */
+	$email_to                               = $user->mail;
+	$from                                   = variable_get('textbook_companion_from_email', '');
+	$bcc                                    = variable_get('textbook_companion_emails', '');
+	$cc                                     = variable_get('textbook_companion_cc_emails', '');
+	$params['example_updated']['example_id'] = $example_id;
+	$params['example_updated']['user_id']    = $user->uid;
+	$params['example_updated']['headers']    = array(
+		'From' => $from,
+		'MIME-Version' => '1.0',
+		'Content-Type' => 'text/plain; charset=UTF-8; format=flowed; delsp=yes',
+		'Content-Transfer-Encoding' => '8Bit',
+		'X-Mailer' => 'Drupal',
+		'Cc' => $cc,
+		'Bcc' => $bcc
+	);
+	if (!drupal_mail('textbook_companion', 'example_updated', $email_to, language_default(), $params, $from, TRUE))
+		drupal_set_message('Error sending email message.', 'error');
+	drupal_set_message(t("Example successfully udpated."), 'status');
+}
 /******************************************************************************/
 /**************************** EDIT CHAPTER TITLE ******************************/
 /******************************************************************************/
-function edit_chapter_title_form($form, $form_state)
-  {
-    global $user;
-    /************************ start approve book details ************************/
-    /*$proposal_q = db_query("SELECT * FROM {textbook_companion_proposal} WHERE uid = %d ORDER BY id DESC LIMIT 1", $user->uid);
-    $proposal_data = db_fetch_object($proposal_q);*/
-    $query = db_select('textbook_companion_proposal');
-    $query->fields('textbook_companion_proposal');
-    $query->condition('uid', $user->uid);
-    $query->orderBy('id', 'DESC');
-    $query->range(0, 1);
-    $result = $query->execute();
-    $proposal_data = $result->fetchObject();
-    if (!$proposal_data)
-      {
-        drupal_set_message("Please submit a " . l('proposal', 'textbook-companion/proposal') . ".", 'error');
-        drupal_goto('textbook-companion/code');
-      }
-    if ($proposal_data->proposal_status != 1 && $proposal_data->proposal_status != 4)
-      {
-        switch ($proposal_data->proposal_status)
-        {
-            case 0:
-                drupal_set_message(t('We have already received your proposal. We will get back to you soon.'), 'status');
-                drupal_goto('textbook-companion/code');
-                return;
-                break;
-            case 2:
-                drupal_set_message(t('Your proposal has been dis-approved. Please create another proposal ' . l('here', 'proposal') . '.'), 'error');
-                drupal_goto('textbook-companion/code');
-                return;
-                break;
-            case 3:
-                drupal_set_message(t('Congratulations! You have completed your last book proposal. You have to create another proposal ' . l('here', 'textbook-companion/proposal') . '.'), 'status');
-                drupal_goto('textbook-companion/code');
-                return;
-                break;
-            default:
-                drupal_set_message(t('Invalid proposal state. Please contact site administrator for further information.'), 'error');
-                drupal_goto('textbook-companion/code');
-                return;
-                break;
-        }
-      }
-    /*$preference_q = db_query("SELECT * FROM {textbook_companion_preference} WHERE proposal_id = %d AND approval_status = 1 LIMIT 1", $proposal_data->id);
-    $preference_data = db_fetch_object($preference_q);*/
-    $query = db_select('textbook_companion_preference');
-    $query->fields('textbook_companion_preference');
-    $query->condition('proposal_id', $proposal_data->id);
-    $query->condition('approval_status', 1);
-    $query->range(0, 1);
-    $result = $query->execute();
-    $preference_data = $result->fetchObject();
-    if (!$preference_data)
-      {
-        drupal_set_message(t('Invalid Book Preference status. Please contact site administrator for further information.'), 'error');
-        drupal_goto('textbook-companion/code');
-        return;
-      }
-    /************************ end approve book details **************************/
-    $chapter_id = arg(4);
-    /*$chapter_q = db_query("SELECT * FROM {textbook_companion_chapter} WHERE id = %d AND preference_id = %d", $chapter_id, $preference_data->id);
-    $chapter_data = db_fetch_object($chapter_q);*/
-    $query = db_select('textbook_companion_chapter');
-    $query->fields('textbook_companion_chapter');
-    $query->condition('id', $chapter_id);
-    $query->condition('preference_id', $preference_data->id);
-    $result = $query->execute();
-    $chapter_data = $result->fetchObject();
-    if (!$chapter_data)
-      {
-        drupal_set_message(t('Invalid chapter.'), 'error');
-        drupal_goto('textbook-companion/code');
-        return;
-      }
-    $form['#redirect'] = 'textbook-companion/code';
-    $form['book_details']['book'] = array(
-        '#type' => 'item',
-        '#markup' => $preference_data->book,
-        '#title' => t('Title of the Book')
-    );
-    $form['contributor_name'] = array(
-        '#type' => 'item',
-        '#markup' => $proposal_data->full_name,
-        '#title' => t('Contributor Name')
-    );
-    $form['number'] = array(
-        '#type' => 'item',
-        '#title' => t('Chapter No'),
-        '#markup' => $chapter_data->number
-    );
-    $form['chapter_title'] = array(
-        '#type' => 'textfield',
-        '#title' => t('Title of the Chapter'),
-        '#size' => 40,
-        '#maxlength' => 255,
-        '#required' => TRUE,
-        '#default_value' => $chapter_data->name
-    );
-    $form['submit'] = array(
-        '#type' => 'submit',
-        '#value' => t('Submit')
-    );
-    $form['cancel'] = array(
-        '#type' => 'markup',
-        '#value' => l(t('Cancel'), 'textbook_companion/code')
-    );
-    return $form;
-  }
+function edit_chapter_title_form($form, &$form_state)
+{
+	global $user;
+	/************************ start approve book details ************************/
+	/*$proposal_q = db_query("SELECT * FROM {textbook_companion_proposal} WHERE uid = %d ORDER BY id DESC LIMIT 1", $user->uid);
+	$proposal_data = db_fetch_object($proposal_q);*/
+	$query = db_select('textbook_companion_proposal');
+	$query->fields('textbook_companion_proposal');
+	$query->condition('uid', $user->uid);
+	$query->orderBy('id', 'DESC');
+	$query->range(0, 1);
+	$result        = $query->execute();
+	$proposal_data = $result->fetchObject();
+	if (!$proposal_data) {
+		drupal_set_message("Please submit a " . l('proposal', 'textbook-companion/proposal') . ".", 'error');
+		drupal_goto('textbook-companion/code');
+	} //!$proposal_data
+	if ($proposal_data->proposal_status != 1 && $proposal_data->proposal_status != 4) {
+		switch ($proposal_data->proposal_status) {
+			case 0:
+				drupal_set_message(t('We have already received your proposal. We will get back to you soon.'), 'status');
+				drupal_goto('textbook-companion/code');
+				return;
+				break;
+			case 2:
+				drupal_set_message(t('Your proposal has been dis-approved. Please create another proposal ' . l('here', 'proposal') . '.'), 'error');
+				drupal_goto('textbook-companion/code');
+				return;
+				break;
+			case 3:
+				drupal_set_message(t('Congratulations! You have completed your last book proposal. You have to create another proposal ' . l('here', 'textbook-companion/proposal') . '.'), 'status');
+				drupal_goto('textbook-companion/code');
+				return;
+				break;
+			default:
+				drupal_set_message(t('Invalid proposal state. Please contact site administrator for further information.'), 'error');
+				drupal_goto('textbook-companion/code');
+				return;
+				break;
+		} //$proposal_data->proposal_status
+	} //$proposal_data->proposal_status != 1 && $proposal_data->proposal_status != 4
+	/*$preference_q = db_query("SELECT * FROM {textbook_companion_preference} WHERE proposal_id = %d AND approval_status = 1 LIMIT 1", $proposal_data->id);
+	$preference_data = db_fetch_object($preference_q);*/
+	$query = db_select('textbook_companion_preference');
+	$query->fields('textbook_companion_preference');
+	$query->condition('proposal_id', $proposal_data->id);
+	$query->condition('approval_status', 1);
+	$query->range(0, 1);
+	$result          = $query->execute();
+	$preference_data = $result->fetchObject();
+	if (!$preference_data) {
+		drupal_set_message(t('Invalid Book Preference status. Please contact site administrator for further information.'), 'error');
+		drupal_goto('textbook-companion/code');
+		return;
+	} //!$preference_data
+	/************************ end approve book details **************************/
+	$chapter_id = arg(4);
+	/*$chapter_q = db_query("SELECT * FROM {textbook_companion_chapter} WHERE id = %d AND preference_id = %d", $chapter_id, $preference_data->id);
+	$chapter_data = db_fetch_object($chapter_q);*/
+	$query      = db_select('textbook_companion_chapter');
+	$query->fields('textbook_companion_chapter');
+	$query->condition('id', $chapter_id);
+	$query->condition('preference_id', $preference_data->id);
+	$result       = $query->execute();
+	$chapter_data = $result->fetchObject();
+	if (!$chapter_data) {
+		drupal_set_message(t('Invalid chapter.'), 'error');
+		drupal_goto('textbook-companion/code');
+		return;
+	} //!$chapter_data
+	$form['#redirect']            = 'textbook-companion/code';
+	$form['book_details']['book'] = array(
+		'#type' => 'item',
+		'#markup' => $preference_data->book,
+		'#title' => t('Title of the Book')
+	);
+	$form['contributor_name']     = array(
+		'#type' => 'item',
+		'#markup' => $proposal_data->full_name,
+		'#title' => t('Contributor Name')
+	);
+	$form['number']               = array(
+		'#type' => 'item',
+		'#title' => t('Chapter No'),
+		'#markup' => $chapter_data->number
+	);
+	$form['chapter_title']        = array(
+		'#type' => 'textfield',
+		'#title' => t('Title of the Chapter'),
+		'#size' => 40,
+		'#maxlength' => 255,
+		'#required' => TRUE,
+		'#default_value' => $chapter_data->name
+	);
+	$form['submit']               = array(
+		'#type' => 'submit',
+		'#value' => t('Submit')
+	);
+	$form['cancel']               = array(
+		'#type' => 'markup',
+		'#value' => l(t('Cancel'), 'textbook_companion/code')
+	);
+	return $form;
+}
 function edit_chapter_title_form_validate($form, &$form_state)
-  {
-    if (!check_name($form_state['values']['chapter_title']))
-        form_set_error('chapter_title', t('Title of the Chapter can contain only alphabets, numbers and spaces.'));
-  }
+{
+	if (!check_name($form_state['values']['chapter_title']))
+		form_set_error('chapter_title', t('Title of the Chapter can contain only alphabets, numbers and spaces.'));
+}
 function edit_chapter_title_form_submit($form, &$form_state)
-  {
-    global $user;
-    /************************ start approve book details ************************/
-    /*$proposal_q = db_query("SELECT * FROM {textbook_companion_proposal} WHERE uid = %d ORDER BY id DESC LIMIT 1", $user->uid);
-    $proposal_data = db_fetch_object($proposal_q);*/
-    $query = db_select('textbook_companion_proposal');
-    $query->fields('textbook_companion_proposal');
-    $query->condition('uid', $user->uid);
-    $query->orderBy('id', 'DESC');
-    $query->range(0, 1);
-    $result = $query->execute();
-    $proposal_data = $result->fetchObject();
-    if (!$proposal_data)
-      {
-        drupal_set_message("Please submit a " . l('proposal', 'textbook-companion/proposal') . ".", 'error');
-        drupal_goto('textbook-companion/code');
-      }
-    if ($proposal_data->proposal_status != 1 && $proposal_data->proposal_status != 4)
-      {
-        switch ($proposal_data->proposal_status)
-        {
-            case 0:
-                drupal_set_message(t('We have already received your proposal. We will get back to you soon.'), 'status');
-                drupal_goto('textbook-companion/code');
-                return;
-                break;
-            case 2:
-                drupal_set_message(t('Your proposal has been dis-approved. Please create another proposal ' . l('here', 'proposal') . '.'), 'error');
-                drupal_goto('textbook-companion/code');
-                return;
-                break;
-            case 3:
-                drupal_set_message(t('Congratulations! You have completed your last book proposal. You have to create another proposal ' . l('here', 'textbook-companion/proposal') . '.'), 'status');
-                drupal_goto('textbook-companion/code');
-                return;
-                break;
-            default:
-                drupal_set_message(t('Invalid proposal state. Please contact site administrator for further information.'), 'error');
-                drupal_goto('textbook-companion/code');
-                return;
-                break;
-        }
-      }
-    /*$preference_q = db_query("SELECT * FROM {textbook_companion_preference} WHERE proposal_id = %d AND approval_status = 1 LIMIT 1", $proposal_data->id);
-    $preference_data = db_fetch_object($preference_q);*/
-    $query = db_select('textbook_companion_preference');
-    $query->fields('textbook_companion_preference');
-    $query->condition('proposal_id', $proposal_data->id);
-    $query->condition('approval_status', 1);
-    $query->range(0, 1);
-    $result = $query->execute();
-    $preference_data = $result->fetchObject();
-    if (!$preference_data)
-      {
-        drupal_set_message(t('Invalid Book Preference status. Please contact site administrator for further information.'), 'error');
-        drupal_goto('textbook-companion/code');
-        return;
-      }
-    /************************ end approve book details **************************/
-    $chapter_id = arg(4);
-    /*$chapter_q = db_query("SELECT * FROM {textbook_companion_chapter} WHERE id = %d AND preference_id = %d", $chapter_id, $preference_data->id);
-    $chapter_data = db_fetch_object($chapter_q);*/
-    $query = db_select('textbook_companion_chapter');
-    $query->fields('textbook_companion_chapter');
-    $query->condition('id', $chapter_id);
-    $query->condition('preference_id', $preference_data->id);
-    $result = $query->execute();
-    $chapter_data = $result->fetchObject();
-    if (!$chapter_data)
-      {
-        drupal_set_message(t('Invalid chapter.'), 'error');
-        drupal_goto('textbookcompanion/code');
-        return;
-      }
-    /*db_query("UPDATE {textbook_companion_chapter} SET name = '%s' WHERE id = %d", $form_state['values']['chapter_title'], $chapter_id);*/
-    $query = db_update('textbook_companion_chapter');
-    $query->fields(array(
-        'name' => $form_state['values']['chapter_title']
-    ));
-    $query->condition('id', $chapter_id);
-    $num_updated = $query->execute();
-    drupal_set_message(t('Title of the Chapter updated.'), 'status');
-  }
+{
+	global $user;
+	/************************ start approve book details ************************/
+	/*$proposal_q = db_query("SELECT * FROM {textbook_companion_proposal} WHERE uid = %d ORDER BY id DESC LIMIT 1", $user->uid);
+	$proposal_data = db_fetch_object($proposal_q);*/
+	$query = db_select('textbook_companion_proposal');
+	$query->fields('textbook_companion_proposal');
+	$query->condition('uid', $user->uid);
+	$query->orderBy('id', 'DESC');
+	$query->range(0, 1);
+	$result        = $query->execute();
+	$proposal_data = $result->fetchObject();
+	if (!$proposal_data) {
+		drupal_set_message("Please submit a " . l('proposal', 'textbook-companion/proposal') . ".", 'error');
+		drupal_goto('textbook-companion/code');
+	} //!$proposal_data
+	if ($proposal_data->proposal_status != 1 && $proposal_data->proposal_status != 4) {
+		switch ($proposal_data->proposal_status) {
+			case 0:
+				drupal_set_message(t('We have already received your proposal. We will get back to you soon.'), 'status');
+				drupal_goto('textbook-companion/code');
+				return;
+				break;
+			case 2:
+				drupal_set_message(t('Your proposal has been dis-approved. Please create another proposal ' . l('here', 'proposal') . '.'), 'error');
+				drupal_goto('textbook-companion/code');
+				return;
+				break;
+			case 3:
+				drupal_set_message(t('Congratulations! You have completed your last book proposal. You have to create another proposal ' . l('here', 'textbook-companion/proposal') . '.'), 'status');
+				drupal_goto('textbook-companion/code');
+				return;
+				break;
+			default:
+				drupal_set_message(t('Invalid proposal state. Please contact site administrator for further information.'), 'error');
+				drupal_goto('textbook-companion/code');
+				return;
+				break;
+		} //$proposal_data->proposal_status
+	} //$proposal_data->proposal_status != 1 && $proposal_data->proposal_status != 4
+	/*$preference_q = db_query("SELECT * FROM {textbook_companion_preference} WHERE proposal_id = %d AND approval_status = 1 LIMIT 1", $proposal_data->id);
+	$preference_data = db_fetch_object($preference_q);*/
+	$query = db_select('textbook_companion_preference');
+	$query->fields('textbook_companion_preference');
+	$query->condition('proposal_id', $proposal_data->id);
+	$query->condition('approval_status', 1);
+	$query->range(0, 1);
+	$result          = $query->execute();
+	$preference_data = $result->fetchObject();
+	if (!$preference_data) {
+		drupal_set_message(t('Invalid Book Preference status. Please contact site administrator for further information.'), 'error');
+		drupal_goto('textbook-companion/code');
+		return;
+	} //!$preference_data
+	/************************ end approve book details **************************/
+	$chapter_id = arg(4);
+	/*$chapter_q = db_query("SELECT * FROM {textbook_companion_chapter} WHERE id = %d AND preference_id = %d", $chapter_id, $preference_data->id);
+	$chapter_data = db_fetch_object($chapter_q);*/
+	$query      = db_select('textbook_companion_chapter');
+	$query->fields('textbook_companion_chapter');
+	$query->condition('id', $chapter_id);
+	$query->condition('preference_id', $preference_data->id);
+	$result       = $query->execute();
+	$chapter_data = $result->fetchObject();
+	if (!$chapter_data) {
+		drupal_set_message(t('Invalid chapter.'), 'error');
+		drupal_goto('textbookcompanion/code');
+		return;
+	} //!$chapter_data
+	/*db_query("UPDATE {textbook_companion_chapter} SET name = '%s' WHERE id = %d", $form_state['values']['chapter_title'], $chapter_id);*/
+	$query = db_update('textbook_companion_chapter');
+	$query->fields(array(
+		'name' => $form_state['values']['chapter_title']
+	));
+	$query->condition('id', $chapter_id);
+	$num_updated = $query->execute();
+	drupal_set_message(t('Title of the Chapter updated.'), 'status');
+}
 /******************************************************************************/
 /************************** GENERAL FUNCTIONS *********************************/
 /******************************************************************************/
 function _list_of_book_titles()
-  {
-    $book_titles = array(
-        '0' => 'Please select...'
-    );
-    /*$book_titles_q = db_query("SELECT * FROM {textbook_companion_preference} WHERE approval_status = 1 OR approval_status = 3 ORDER BY book ASC");*/
-    $query = db_select('textbook_companion_preference');
-    $query->fields('textbook_companion_preference');
-    $or = db_or();
-    $or->condition('approval_status', 1);
-    $or->condition('approval_status', 3);
-    $query->condition($or);
-    $query->orderBy('book', 'ASC');
-    $book_titles_q = $query->execute();
-    while ($book_titles_data = $book_titles_q->fetchObject())
-      {
-        $book_titles[$book_titles_data->id] = $book_titles_data->book . ' (Written by ' . $book_titles_data->author . ')';
-      }
-    return $book_titles;
-  }
+{
+	$book_titles = array(
+		'0' => 'Please select...'
+	);
+	/*$book_titles_q = db_query("SELECT * FROM {textbook_companion_preference} WHERE approval_status = 1 OR approval_status = 3 ORDER BY book ASC");*/
+	$query       = db_select('textbook_companion_preference');
+	$query->fields('textbook_companion_preference');
+	$or = db_or();
+	$or->condition('approval_status', 1);
+	$or->condition('approval_status', 3);
+	$query->condition($or);
+	$query->orderBy('book', 'ASC');
+	$book_titles_q = $query->execute();
+	while ($book_titles_data = $book_titles_q->fetchObject()) {
+		$book_titles[$book_titles_data->id] = $book_titles_data->book . ' (Written by ' . $book_titles_data->author . ')';
+	} //$book_titles_data = $book_titles_q->fetchObject()
+	return $book_titles;
+}