<?php
    if (!defined('CHYRP_VERSION'))
        exit;
?>
var ChyrpLikes = {
    failed: false,
    busy: false,
    init: function() {
        $("div.likes a.likes").click(
            function(e) {
                if (!ChyrpLikes.failed) {
                    e.preventDefault();
                    ChyrpLikes.toggle($(this).attr("data-post_id"));
                }
            }
        );
        ChyrpLikes.watch();
    },
    watch: function() {
        // Watch for DOM additions on blog pages.
        if (!!window.MutationObserver && $(".post").length) {
            var target = $(".post").last().parent()[0];
            var observer = new MutationObserver(
                function(mutations) {
                    mutations.forEach(
                        function(mutation) {
                            for (var i = 0; i < mutation.addedNodes.length; ++i) {
                                var item = mutation.addedNodes[i];
                                $(item).find("div.likes a.likes").click(
                                    function(e) {
                                        e.preventDefault();
                                        ChyrpLikes.toggle($(this).attr("data-post_id"));
                                    }
                                );
                            }
                        }
                    );
                }
            );
            var config = {
                childList: true,
                subtree: true
            };
            observer.observe(target, config);
        }
    },
    send: function(post_id, callback, isUnlike) {
        if (!ChyrpLikes.busy && !ChyrpLikes.failed) {
            $.ajax(
                {
                    type: "POST",
                    url: Site.ajax_url,
                    data: {
                        "action": (isUnlike) ? "unlike" : "like",
                        "post_id": post_id
                    },
                    beforeSend: function() {
                        ChyrpLikes.busy = true;	
                    },
                    success: function(response) {
                        // Action was ignored if data value is false.
                        if (response.data === true)
                            callback(response);
                    },
                    complete: function() {
                        ChyrpLikes.busy = false;
                    },
                    dataType: "json",
                    error: ChyrpLikes.panic
                }
            );
        }
    },
    toggle: function(post_id) {
        if ($("#likes_" + post_id + " a.liked").length) {
            ChyrpLikes.send(
                post_id,
                function(response) {
                    var div = $("#likes_" + post_id);
                    div.children("span.like_text").html(response.text);
                    div.children("a.liked").removeClass("liked").addClass("like");
                },
                true
            );
        } else {
            ChyrpLikes.send(
                post_id,
                function(response) {
                    var div = $("#likes_" + post_id);
                    div.children("span.like_text").html(response.text);
                    div.children("a.like").removeClass("like").addClass("liked");
                },
                false
            );
        }
    },
    panic: function() {
        ChyrpLikes.failed = true;
        Oops.count++;
        alert(Oops.message);
    }
};
$(document).ready(ChyrpLikes.init);