From 2573218d555728d23dd2bb64c4963be2c45eb347 Mon Sep 17 00:00:00 2001
From: calzoneman <calzoneman@gmail.com>
Date: Wed, 31 Jul 2013 10:57:59 -0400
Subject: [PATCH] Paginate channel ranks

---
 www/assets/js/callbacks.js |  76 ++++++++++++++++++++-------
 www/assets/js/paginator.js | 103 +++++++++++++++++++++++++++++++++++++
 www/assets/js/util.js      |  57 --------------------
 www/channel.html           |   1 +
 4 files changed, 161 insertions(+), 76 deletions(-)
 create mode 100644 www/assets/js/paginator.js

diff --git a/www/assets/js/callbacks.js b/www/assets/js/callbacks.js
index 98ad4464..b53c3e2e 100644
--- a/www/assets/js/callbacks.js
+++ b/www/assets/js/callbacks.js
@@ -426,25 +426,61 @@ Callbacks = {
         if(tbl.children().length > 1) {
             $(tbl.children()[1]).remove();
         }
-        $("#channelranks_pagination").remove();
-        if(entries.length > 20) {
-            var pag = $("<div/>").addClass("pagination span12")
-                .attr("id", "channelranks_pagination")
-                .prependTo($("#channelranks"));
-            var btns = $("<ul/>").appendTo(pag);
-            for(var i = 0; i < entries.length / 20; i++) {
-                var li = $("<li/>").appendTo(btns);
-                (function(i) {
-                $("<a/>").attr("href", "javascript:void(0)")
-                    .text(i+1)
-                    .click(function() {
-                        loadChannelRanksPage(i);
-                    })
-                    .appendTo(li);
-                })(i);
-            }
+        var p = tbl.data("paginator");
+        if(p) {
+            p.items = entries;
+            p.loadPage(0);
+        }
+        else {
+            var opts = {
+                preLoadPage: function (p) {
+                    tbl.find("tbody").remove();
+                    tbl.data("page", p);
+                },
+                generator: function (item, page, index) {
+                    var tr = $("<tr/>").appendTo(tbl);
+                    var name = $("<td/>").text(item.name).appendTo(tr);
+                    name.addClass(getNameColor(item.rank));
+                    var rank = $("<td/>").text(item.rank)
+                        .css("min-width", "220px")
+                        .appendTo(tr);
+                    rank.click(function() {
+                        if(this.find(".rank-edit").length > 0)
+                            return;
+                        var r = this.text();
+                        this.text("");
+                        var edit = $("<input/>").attr("type", "text")
+                            .attr("placeholder", r)
+                            .addClass("rank-edit")
+                            .appendTo(this)
+                            .focus();
+                        if(parseInt(r) >= CLIENT.rank) {
+                            edit.attr("disabled", true);
+                        }
+                        function save() {
+                            var r = this.val();
+                            var r2 = r;
+                            if(r.trim() == "" || parseInt(r) >= CLIENT.rank || parseInt(r) < 1)
+                                r = this.attr("placeholder");
+                            r = parseInt(r) + "";
+                            this.parent().text(r);
+                            socket.emit("setChannelRank", {
+                                user: item.name,
+                                rank: parseInt(r)
+                            });
+                        }
+                        edit.blur(save.bind(edit));
+                        edit.keydown(function(ev) {
+                            if(ev.keyCode == 13)
+                                save.bind(edit)();
+                        });
+                    }.bind(rank));
+                }
+            };
+            var p = Paginate(entries, opts);
+            p.paginator.insertBefore($("#channelranks table"));
+            tbl.data("paginator", p);
         }
-        loadChannelRanksPage(0);
     },
 
     setChannelRank: function(data) {
@@ -456,7 +492,9 @@ Callbacks = {
             }
         }
         $("#channelranks").data("entries", ents);
-        loadChannelRanksPage($("#channelranks").data("page"));
+        $("#channelranks table").data("paginator").loadPage(
+            $("#channelranks table").data("page")
+        );
     },
 
     voteskip: function(data) {
diff --git a/www/assets/js/paginator.js b/www/assets/js/paginator.js
new file mode 100644
index 00000000..3b862ed4
--- /dev/null
+++ b/www/assets/js/paginator.js
@@ -0,0 +1,103 @@
+(function () {
+
+    var defaults = {
+        preLoadPage: function () { },
+        postLoadPage: function () { },
+        generator: function () { },
+        itemsPerPage: 20,
+        maxPages: 5
+    };
+
+    function P(items, opts) {
+        this.items = items;
+        this.opts = opts || {};
+        for(var k in defaults)
+            if(!this.opts[k])
+                this.opts[k] = defaults[k];
+        this.paginator = $("<div/>").addClass("pagination");
+        this.loadPage(0);
+    }
+
+    P.prototype.loadButtons = function (p) {
+        var pages = parseInt(this.items.length / this.opts.itemsPerPage+0.5);
+        var endcaps = pages > this.opts.maxPages;
+        this.paginator.html("");
+        if(this.items.length < this.opts.itemsPerPage)
+            return;
+        var ul = $("<ul/>").appendTo(this.paginator);
+        var s = p - parseInt(this.opts.maxPages / 2);
+        s = s < 0 ? 0 : s;
+        s = s + this.opts.maxPages < pages ? s : pages - this.opts.maxPages;
+        if(endcaps) {
+            var li = $("<li/>").appendTo(ul);
+            $("<a/>").attr("href", "javascript:void(0)")
+                .html("&laquo;")
+                .click(function () {
+                    this.loadPage(0);
+                }.bind(this))
+                .appendTo(li);
+
+            if(p == 0)
+                li.addClass("disabled");
+
+            if(s > 0) {
+                var sep = $("<li/>").addClass("disabled")
+                    .appendTo(ul);
+                $("<a/>").attr("href", "javascript:void(0)")
+                    .html("&hellip;")
+                    .appendTo(sep);
+            }
+        }
+        for(var i = s; i < s + this.opts.maxPages; i++) {
+            (function (i) {
+            var li = $("<li/>").appendTo(ul);
+            if(i == p)
+                li.addClass("active");
+            $("<a/>").attr("href", "javascript:void(0)")
+                .text(i + 1)
+                .click(function () {
+                    this.loadPage(i);
+                }.bind(this))
+                .appendTo(li);
+            }.bind(this))(i);
+        }
+        if(endcaps) {
+            if(s + this.opts.maxPages < pages) {
+                var sep = $("<li/>").addClass("disabled")
+                    .appendTo(ul);
+                $("<a/>").attr("href", "javascript:void(0)")
+                    .html("&hellip;")
+                    .appendTo(sep);
+            }
+
+            var li = $("<li/>").appendTo(ul);
+            $("<a/>").attr("href", "javascript:void(0)")
+                .html("&raquo;")
+                .click(function () {
+                    this.loadPage(pages - 1);
+                }.bind(this))
+                .appendTo(li);
+
+            if(p == pages - 1)
+                li.addClass("disabled");
+        }
+    }
+
+    P.prototype.loadPage = function (page) {
+        this.opts.preLoadPage(page);
+        this.loadButtons(page);
+        var s = page * this.opts.itemsPerPage;
+        var e = s + this.opts.itemsPerPage;
+        if(e > this.items.length)
+            e = this.items.length;
+        for(var i = s; i < e; i++) {
+            this.opts.generator(this.items[i], page, i);
+        }
+        this.opts.postLoadPage();
+    }
+
+    window.Paginate = function (items, opts) {
+       var p = new P(items, opts);
+       return p;
+    };
+})();
diff --git a/www/assets/js/util.js b/www/assets/js/util.js
index ec5ad9c9..19fe3ca1 100644
--- a/www/assets/js/util.js
+++ b/www/assets/js/util.js
@@ -1419,63 +1419,6 @@ function genPermissionsEditor() {
     });
 }
 
-function loadChannelRanksPage(page) {
-    var entries = $("#channelranks").data("entries");
-    $("#channelranks").data("page", page);
-    var start = page * 20;
-    var tbl = $("#channelranks table");
-    if(tbl.children().length > 1) {
-        $(tbl.children()[1]).remove();
-    }
-    for(var i = start; i < start + 20 && i < entries.length; i++) {
-        var tr = $("<tr/>").appendTo(tbl);
-        var name = $("<td/>").text(entries[i].name).appendTo(tr);
-        name.addClass(getNameColor(entries[i].rank));
-        var rank = $("<td/>").text(entries[i].rank)
-            .css("min-width", "220px")
-            .appendTo(tr);
-        (function(name) {
-        rank.click(function() {
-            if(this.find(".rank-edit").length > 0)
-                return;
-            var r = this.text();
-            this.text("");
-            var edit = $("<input/>").attr("type", "text")
-                .attr("placeholder", r)
-                .addClass("rank-edit")
-                .appendTo(this)
-                .focus();
-            if(parseInt(r) >= CLIENT.rank) {
-                edit.attr("disabled", true);
-            }
-            function save() {
-                var r = this.val();
-                var r2 = r;
-                if(r.trim() == "" || parseInt(r) >= CLIENT.rank || parseInt(r) < 1)
-                    r = this.attr("placeholder");
-                r = parseInt(r) + "";
-                this.parent().text(r);
-                socket.emit("setChannelRank", {
-                    user: name,
-                    rank: parseInt(r)
-                });
-            }
-            edit.blur(save.bind(edit));
-            edit.keydown(function(ev) {
-                if(ev.keyCode == 13)
-                    save.bind(edit)();
-            });
-        }.bind(rank));
-        })(entries[i].name);
-    }
-    if($("#channelranks_pagination").length > 0) {
-        $("#channelranks_pagination").find("li").each(function() {
-            $(this).removeClass("active");
-        });
-        $($("#channelranks_pagination").find("li")[page]).addClass("active");
-    }
-}
-
 function waitUntilDefined(obj, key, fn) {
     if(typeof obj[key] === "undefined") {
         setTimeout(function () {
diff --git a/www/channel.html b/www/channel.html
index dc69c0f2..68d063f5 100644
--- a/www/channel.html
+++ b/www/channel.html
@@ -227,6 +227,7 @@
   <script src="./assets/js/iourl.js"></script>
   <script src="./assets/js/player.js"></script>
   <script src="./assets/js/notwebsocket.js"></script>
+  <script src="./assets/js/paginator.js"></script>
   <script src="./assets/js/util.js"></script>
   <script src="./assets/js/ui.js"></script>
   <script src="./assets/js/callbacks.js"></script>