WIP: Add auto-sheriff.appspot.com code to Blink

Tools/AutoSheriff/scripts/third_party/js_humanized_time_span/humanized_time_span.js

Index: Tools/AutoSheriff/scripts/third_party/js_humanized_time_span/humanized_time_span.js
diff --git a/Tools/AutoSheriff/scripts/third_party/js_humanized_time_span/humanized_time_span.js b/Tools/AutoSheriff/scripts/third_party/js_humanized_time_span/humanized_time_span.js
new file mode 100644
index 0000000000000000000000000000000000000000..efddf4ebd5275e76098351336c92b33f79f83973
--- /dev/null
+++ b/Tools/AutoSheriff/scripts/third_party/js_humanized_time_span/humanized_time_span.js
@@ -0,0 +1,105 @@
+// Copyright (C) 2011 by Will Tomlins
+// 
+// Github profile: http://github.com/layam
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+
+function humanized_time_span(date, ref_date, date_formats, time_units) {
+  //Date Formats must be be ordered smallest -> largest and must end in a format with ceiling of null
+  date_formats = date_formats || {
+    past: [
+      { ceiling: 60, text: "$seconds seconds ago" },
+      { ceiling: 3600, text: "$minutes minutes ago" },
+      { ceiling: 86400, text: "$hours hours ago" },
+      { ceiling: 2629744, text: "$days days ago" },
+      { ceiling: 31556926, text: "$months months ago" },
+      { ceiling: null, text: "$years years ago" }      
+    ],
+    future: [
+      { ceiling: 60, text: "in $seconds seconds" },
+      { ceiling: 3600, text: "in $minutes minutes" },
+      { ceiling: 86400, text: "in $hours hours" },
+      { ceiling: 2629744, text: "in $days days" },
+      { ceiling: 31556926, text: "in $months months" },
+      { ceiling: null, text: "in $years years" }
+    ]
+  };
+  //Time units must be be ordered largest -> smallest
+  time_units = time_units || [
+    [31556926, 'years'],
+    [2629744, 'months'],
+    [86400, 'days'],
+    [3600, 'hours'],
+    [60, 'minutes'],
+    [1, 'seconds']
+  ];
+  
+  date = new Date(date);
+  ref_date = ref_date ? new Date(ref_date) : new Date();
+  var seconds_difference = (ref_date - date) / 1000;
+  
+  var tense = 'past';
+  if (seconds_difference < 0) {
+    tense = 'future';
+    seconds_difference = 0-seconds_difference;
+  }
+  
+  function get_format() {
+    for (var i=0; i<date_formats[tense].length; i++) {
+      if (date_formats[tense][i].ceiling == null || seconds_difference <= date_formats[tense][i].ceiling) {
+        return date_formats[tense][i];
+      }
+    }
+    return null;
+  }
+  
+  function get_time_breakdown() {
+    var seconds = seconds_difference;
+    var breakdown = {};
+    for(var i=0; i<time_units.length; i++) {
+      var occurences_of_unit = Math.floor(seconds / time_units[i][0]);
+      seconds = seconds - (time_units[i][0] * occurences_of_unit);
+      breakdown[time_units[i][1]] = occurences_of_unit;
+    }
+    return breakdown;
+  }
+
+  function render_date(date_format) {
+    var breakdown = get_time_breakdown();
+    var time_ago_text = date_format.text.replace(/\$(\w+)/g, function() {
+      return breakdown[arguments[1]];
+    });
+    return depluralize_time_ago_text(time_ago_text, breakdown);
+  }
+  
+  function depluralize_time_ago_text(time_ago_text, breakdown) {
+    for(var i in breakdown) {
+      if (breakdown[i] == 1) {
+        var regexp = new RegExp("\\b"+i+"\\b");
+        time_ago_text = time_ago_text.replace(regexp, function() {
+          return arguments[0].replace(/s\b/g, '');
+        });
+      }
+    }
+    return time_ago_text;
+  }
+          
+  return render_date(get_format());
+}