<?php 
    function feedback_menu() {
        $items = array();
        $items["feedback"] = array(
            "title"  => "Oscad workshop feedback form.",
            "page callback" => "feedback_all",
            "access arguments" => array("access feedback"),
            "type" => MENU_CALLBACK
        );
        $items["feedback/thank-you"] = array(
            "title"  => "Thank you",
            "page callback" => "feedback_thank_you_all",
            "access arguments" => array("access feedback"),
            "type" => MENU_CALLBACK
        );
        return $items;
    }

    function feedback_perm() {
        return array(
            "access feedback",
        );
    }

    function feedback_form($form_state) {
        $form = array();
        $form["wrapper"] = array(
            '#type' => "fieldset",
            "#title" => t("
                (Feedback form for the Oscad workshop conducted on 
                10th May 2014 at PESIT, Bangalore.)
            "),
            "#prefix" => "<div class='feedback-form'>",
            "#suffix" => "</div>",
        );
        $form["wrapper"]["first_name"] = array(
            "#type" => "textfield",
            "#title" => t("First name"),
            "#required" => TRUE
        );
        $form["wrapper"]["last_name"] = array(
            "#type" => "textfield",
            "#title" => t("Last name"),
            "#required" => TRUE
        );
        $form["wrapper"]["email"] = array(
            "#type" => "textfield",
            "#title" => t("Email"),
            "#required" => FALSE
        );
        $form["wrapper"]["phone"] = array(
            "#type" => "textfield",
            "#title" => t("Phone"),
            "#required" => FALSE
        );
        $form["wrapper"]["institution"] = array(
            "#type" => "textfield",
            "#title" => t("Institution/College"),
            "#required" => TRUE
        );
        $form["wrapper"]["activities"] = array(
            "#type" => "checkboxes",
            "#title" => t(" 
                1. Which of the following activities are you interested to 
                contribute to (Tick all that are applicable.)?
            "),
            "#options" => get_activities(),
            "#required" => TRUE
        );
        $form["wrapper"]["rating"] = array(
            "#type" => "radios",
            "#title" => t("
                2. How would you rate this workshop on a scale of 5?
            "),
            "#options" => array_combine(range(1, 5), range(1, 5)),
            "#required" => TRUE
        );
        $form["wrapper"]["liked"] = array(
            "#type" => "textarea",
            "#title" => t("3. Things that you liked in Oscad workshop"),
            "#required" => TRUE
        );
        $form["wrapper"]["disliked"] = array(
            "#type" => "textarea",
            "#title" => t("4. Things that you disliked in Oscad workshop"),
            "#required" => TRUE
        );
        $form["wrapper"]["difficulties"] = array(
            "#type" => "textarea",
            "#title" => t("
                5. Did you face any difficulties while using Oscad?
            "),
            "#required" => TRUE
        );
        $form["wrapper"]["platform"] = array(
            "#type" => "radios",
            "#title" => t("6. On which platform do you use Oscad?"),
            "#options" => array(
                t("GNU/Linux"),
                t("Windows"),
                t("Both")
            ),
            "#required" => TRUE
        );
        $form["wrapper"]["missing"] = array(
            "#type" => "textarea",
            "#title" => t("7. Any feature you find missing in Oscad?"),
            "#required" => TRUE
        );
        $form["wrapper"]["workshop"] = array(
            "#type" => "radios",
            "#title" => t("
                8. Would you like to have a workshop 
                on advanced features of Oscad?
            "),
            "#options" => array(
                t("Yes"), t("No")
            ),
            "#required" => TRUE
        );
        $form["wrapper"]["future"] = array(
            "#type" => "radios",
            "#title" => t("
                9. Can we contact you in the future to 
                know your experience with Oscad?
            "),
            "#options" => array(
                t("Yes"), t("No")
            ),
            "#required" => TRUE
        );
        $form["wrapper"]["contact"] = array(
            "#type" => "textarea",
            "#title" => t("
                10. Please provide your contact details if you 
                selected 'Yes' in question 8 or 9.
            "),
            "#required" => FALSE
        );
        $form["wrapper"]["magazines"] = array(
            "#type" => "textarea",
            "#title" => t("
                11. In order to inform the college teachers and students 
                about Oscad, we plan to place advertisements. 
                Which technical magazines do you read?
            "),
            "#required" => FALSE
        );
        $form["wrapper"]["suggestion"] = array(
            "#type" => "textarea",
            "#title" => t("
                12. Any other Suggestions / Feedback / Appreciation
            "),
            "#required" => FALSE
        );
        $form["wrapper"]["submit"] = array(
            "#type" => "submit",
            "#value" => "Submit"
        );
        return $form;
    }

    function feedback_form_validate($form, &$form_state) {
        /* making contact field required if 'Yes' in workshop/future field */
        $v = $form_state["values"];
        if(($v["workshop"] == 0 || $v["future"] == 0) && $v["contact"] == "") {
            form_set_error("contact", "
                10. Please provide your contact details if you selected 'Yes' 
                in question 8 or 9. This field is required since you selected
                'Yes' in question 8 or 9.
            ");
        }
        if($v["email"] && !valid_email_address($v["email"])) {
            form_set_error("email", "Please enter a valid email id.");
        }
        if($v["phone"] && !is_numeric($v["phone"])) {
            form_set_error("phone", "Please enter a valid phone number. (Only digits allowed)");
        }
    }

    function feedback_form_submit($form, &$form_state) {
        /* escaping special characters */
        foreach($form_state["values"] as $key => $value) {
            if(gettype($value) == "string") {
                $form_state["values"][$key] = db_escape_string($value);
            }
        }
        $v = $form_state["values"];
        $v["activities"] = implode(",", array_filter($v["activities"]));
        $query = "
            INSERT INTO feedback (
                first_name, last_name, email, phone, institution, activities, 
                rating, liked, disliked, difficulties, platform, missing, 
                workshop, future, contact, magazines, suggestion
            ) VALUES (
                '{$v["first_name"]}', '{$v["last_name"]}', '{$v["email"]}', 
                '{$v["phone"]}', '{$v["institution"]}', '{$v["activities"]}', 
                {$v["rating"]}, '{$v["liked"]}', '{$v["disliked"]}', 
                '{$v["difficulties"]}', {$v["platform"]}, '{$v["missing"]}',
                {$v["workshop"]}, {$v["future"]}, '{$v["contact"]}', 
                '{$v["magazines"]}', '{$v["suggestion"]}'
            )
        ";
        $result = db_query($query);
        drupal_goto("feedback/thank-you");
    }

    function feedback_all() {
        $page_content = "";
        $page_content .= "
            <div style='color: red;'>
                <sup>*</sup> Required
            </div>
        ";
        $page_content .= drupal_get_form("feedback_form");
        return $page_content;
    }

    function feedback_thank_you_all() {
        $page_content = "";
        $page_content .= "<br>";
        $page_content .= l("Click here", "feedback");
        $page_content .= " to submit another feedback.";
        drupal_set_message("Feedback recorded successfully.");
        return $page_content;
    }

    function feedback_init() {
        drupal_add_css(drupal_get_path("module", "feedback") . "/css/feedback.css");
    }

    /* helper functions */
    function get_activities() {
        return array(
            1 => t("Creating a textbook companion (TBC)"),
            2 => t("Migrating your lab to Oscad (LM)"),
            3 => t("Adding to component library (CL)"),
            4 => t("Doing projects (BE, M.Sc, ME, Ph.D) with Oscad"),
            5 => t("Review of the above (TBC, LM, CL, projects)"),
            6 => t("Building hardware using Oscad and testing"),
            7 => t("Enhancing the capabilities of Oscad - need IT expertise"),
            8 => t("Creation of Spoken Tutorials on Oscad"),
            9 => t("Promoting Oscad"),
        );
    }
?>