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+/*
+ * Abnormal Situation Management - Guidelines
+ *
+ * 8.5 - p2: Use consistent numeric formats to enable quick reading.
+ * Notes: Don't use leading 0's for integer values, *do* provide leading 0 for
+ * fractional values < 1, justify columns on decimal point, include units.
+ * Some easy, some hard. (how do we map units to numbers? can we get the screen
+ * coordinates for every '.' in the dom?)
+ *
+ */
+exports.name='Inconsistent numerical formatting';
+exports.description='Use consistent numeric formats to enable quick reading.';
+
+exports.rule = function (report) {
+
+  // Predicate used on DOM elements below.
+  var hasText = function(i) { return ($5(this).text().trim().length); };
+
+  // Rule specifications:
+  // (we assume re's below run on strings which already match the general
+  // number format given in getNums.)
+  var bads = [ { re:  '[+-]?0\\d'   // e.g. 032
+               , msg: 'numbers larger than 1 should not lead with a zero' }
+
+               , { re:  '^[+-]?\\.\\d'  // e.g. -.145
+                 , msg: 'fractional numbers less than 1 should have a leading zero' }
+
+               , { re:  '\\.$'  // e.g. 32.
+                 , msg: 'numbers should not end with a decimal' } ];
+
+  /* Returns a function from a rule specification. */
+  var checkBad = function(b) {
+    var res = {};
+    var f = function (n) {
+      var r = new RegExp(b.re);
+      if (r.exec(n)) { return true; }
+      else { return false; }
+    };
+    res.fcn = f;
+    res.rule = b;  // save the rule
+    return res;
+  };
+  var fcns = _.map(bads, checkBad);
+
+  // DOM element -> it's full text content including children separeted by
+  // spaces. We do this instead of just calling text() or .textContent because
+  // we want text of children separeted from each other with whitespace.
+  var betterText= function (e) {
+    if (!$5(e).children()) {
+      return $5(e).text();
+    }
+    else {
+      // extract text from the children recursively
+      var ctxts = _.map($5(e).children(), betterText);
+      // remove the children and extract text
+      ctxts.push($(e).clone().children().remove().end().text());
+      return ctxts.join(' ');
+    }
+  };
+
+  /* Returns an array of the numbers found in the given DOM node's text. */
+  var getNums = function (e) {
+    //var txt = $5(e).text().trim();
+    var txt = betterText(e);
+    var re = new RegExp('(^|\\b)[+-]?(\\d+(\\.)?\\d*|\\.\\d+)(\\b|$)', 'g');
+    var matches = [], found;
+    while (found = re.exec(txt)) {
+      matches.push(found[0]);
+    }
+    // FUUUCCCKKKK
+    return matches;
+  };
+
+  // Main rule query
+  $5("*").filter(hasText).each(function(i, elt) {
+    var nums = getNums(elt);
+    _.each(fcns, function (rul, ii, l) {
+      var m = _.map(nums, rul.fcn);
+      if (_.some(m)) { // some number in nums is bad for this rule
+        // check if a child node has the same problem
+        var childNums = _.flatten(_.map($5(elt).children(), getNums));
+        if (_.some(_.map(childNums, rul.fcn))) {
+          return;  // don't report it, break out of _.each iteration
+        }
+        else {  // no child has the same problem
+          report.error(rul.msg, elt);
+        }
+      }
+    });
+  });
+
+}
+