frontend: check in html, css, js

frontend/js/utils.js

@@ -0,0 +1,108 @@
+(function (global, document) {
+
+  // Gets a GET parameter in the current URL.
+  global.paramGet = function(param) {
+    var pageURL = decodeURIComponent(window.location.search.substring(1));
+    var urlVariables = pageURL.split('&');
+
+    for (var i = 0; i < urlVariables.length; i++) {
+      var paramURL = urlVariables[i].split('=');
+      if (paramURL[0] === param)
+        return paramURL[1] === undefined ? true : paramURL[1];
+    }
+
+    return null;
+  }
+
+
+  // Sets the disabled attribute in a button.
+  global.buttonDisable = function(id) {
+    var el = $(id);
+
+    el.attr("disabled", true);
+  }
+
+
+  // Unsets the disabled attribute in a button.
+  global.buttonEnable = function(id) {
+    var el = $(id);
+
+    el.attr("disabled", false);
+  }
+
+  // Sets the text on the given label ID.
+  global.textSet = function(id, text) {
+    var el = $(id);
+
+    el.show();
+    el.text(text);
+  }
+
+
+  // Given an array of input IDs, this function calls a callback function with
+  // the first unfilled ID.
+  global.unfilledMark = function(fields, callback) {
+    var all_ok = true;
+
+    for (var i = 0; i < fields.length; i++) {
+      var el = $(fields[i]);
+      if (el.val() == "") {
+        callback(el);
+      }
+    }
+
+    return all_ok;
+  }
+
+
+  // Gets the value of a cookie.
+  global.cookieGet = function(name) {
+    var c = "; " + document.cookie;
+    var x = c.split("; " + name + "=");
+    if (x.length == 2)
+      return x.pop().split(";").shift();
+  };
+
+
+  // Sets the value of a cookie.
+  global.cookieSet = function(name, value) {
+    var expires = "";
+    var date = new Date();
+    date.setTime(date.getTime() + (365*24*60*60*1000));
+    expires = "; expires=" + date.toUTCString();
+
+    document.cookie = name + "=" + value + expires + "; path=/";
+  }
+
+
+  // Converts a date in the past to a human-friendly duration relative to now.
+  global.timeSince = function(date) {
+    var seconds = Math.floor((new Date() - date) / 1000);
+    var interval = Math.floor(seconds / 31536000);
+
+    if (interval > 1)
+      return interval + " years ago";
+
+    interval = Math.floor(seconds / 2592000);
+    if (interval > 1)
+      return interval + " months ago";
+
+    interval = Math.floor(seconds / 86400);
+    if (interval > 1)
+      return interval + " days ago";
+
+    interval = Math.floor(seconds / 3600);
+    if (interval > 1)
+      return interval + " hours ago";
+
+    interval = Math.floor(seconds / 60);
+    if (interval > 1)
+      return interval + " minutes ago";
+
+    if (seconds > 5)
+      return Math.floor(seconds) + " seconds ago";
+    else
+      return "just now";
+  }
+
+} (window, document));