~ merge
authorAlexandre Bertails <bertails@w3.org>
Tue, 23 Aug 2011 16:43:08 -0400
changeset 29 5a7b4f478677
parent 28 2f6ec4dcf606 (current diff)
parent 25 0eb5bcfce248 (diff)
child 31 81ebc65be8b6
child 32 7d4682ad247b
~ merge
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/resources/manifest/tracker.manifest	Tue Aug 23 16:43:08 2011 -0400
@@ -0,0 +1,7 @@
+CACHE MANIFEST
+
+/tracker
+/styles/tracker.css
+/scripts/tracker.js
+/scripts/json2.js
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/resources/scripts/json2.js	Tue Aug 23 16:43:08 2011 -0400
@@ -0,0 +1,480 @@
+/*
+    http://www.JSON.org/json2.js
+    2011-02-23
+
+    Public Domain.
+
+    NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
+
+    See http://www.JSON.org/js.html
+
+
+    This code should be minified before deployment.
+    See http://javascript.crockford.com/jsmin.html
+
+    USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
+    NOT CONTROL.
+
+
+    This file creates a global JSON object containing two methods: stringify
+    and parse.
+
+        JSON.stringify(value, replacer, space)
+            value       any JavaScript value, usually an object or array.
+
+            replacer    an optional parameter that determines how object
+                        values are stringified for objects. It can be a
+                        function or an array of strings.
+
+            space       an optional parameter that specifies the indentation
+                        of nested structures. If it is omitted, the text will
+                        be packed without extra whitespace. If it is a number,
+                        it will specify the number of spaces to indent at each
+                        level. If it is a string (such as '\t' or '&nbsp;'),
+                        it contains the characters used to indent at each level.
+
+            This method produces a JSON text from a JavaScript value.
+
+            When an object value is found, if the object contains a toJSON
+            method, its toJSON method will be called and the result will be
+            stringified. A toJSON method does not serialize: it returns the
+            value represented by the name/value pair that should be serialized,
+            or undefined if nothing should be serialized. The toJSON method
+            will be passed the key associated with the value, and this will be
+            bound to the value
+
+            For example, this would serialize Dates as ISO strings.
+
+                Date.prototype.toJSON = function (key) {
+                    function f(n) {
+                        // Format integers to have at least two digits.
+                        return n < 10 ? '0' + n : n;
+                    }
+
+                    return this.getUTCFullYear()   + '-' +
+                         f(this.getUTCMonth() + 1) + '-' +
+                         f(this.getUTCDate())      + 'T' +
+                         f(this.getUTCHours())     + ':' +
+                         f(this.getUTCMinutes())   + ':' +
+                         f(this.getUTCSeconds())   + 'Z';
+                };
+
+            You can provide an optional replacer method. It will be passed the
+            key and value of each member, with this bound to the containing
+            object. The value that is returned from your method will be
+            serialized. If your method returns undefined, then the member will
+            be excluded from the serialization.
+
+            If the replacer parameter is an array of strings, then it will be
+            used to select the members to be serialized. It filters the results
+            such that only members with keys listed in the replacer array are
+            stringified.
+
+            Values that do not have JSON representations, such as undefined or
+            functions, will not be serialized. Such values in objects will be
+            dropped; in arrays they will be replaced with null. You can use
+            a replacer function to replace those with JSON values.
+            JSON.stringify(undefined) returns undefined.
+
+            The optional space parameter produces a stringification of the
+            value that is filled with line breaks and indentation to make it
+            easier to read.
+
+            If the space parameter is a non-empty string, then that string will
+            be used for indentation. If the space parameter is a number, then
+            the indentation will be that many spaces.
+
+            Example:
+
+            text = JSON.stringify(['e', {pluribus: 'unum'}]);
+            // text is '["e",{"pluribus":"unum"}]'
+
+
+            text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
+            // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
+
+            text = JSON.stringify([new Date()], function (key, value) {
+                return this[key] instanceof Date ?
+                    'Date(' + this[key] + ')' : value;
+            });
+            // text is '["Date(---current time---)"]'
+
+
+        JSON.parse(text, reviver)
+            This method parses a JSON text to produce an object or array.
+            It can throw a SyntaxError exception.
+
+            The optional reviver parameter is a function that can filter and
+            transform the results. It receives each of the keys and values,
+            and its return value is used instead of the original value.
+            If it returns what it received, then the structure is not modified.
+            If it returns undefined then the member is deleted.
+
+            Example:
+
+            // Parse the text. Values that look like ISO date strings will
+            // be converted to Date objects.
+
+            myData = JSON.parse(text, function (key, value) {
+                var a;
+                if (typeof value === 'string') {
+                    a =
+/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
+                    if (a) {
+                        return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
+                            +a[5], +a[6]));
+                    }
+                }
+                return value;
+            });
+
+            myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
+                var d;
+                if (typeof value === 'string' &&
+                        value.slice(0, 5) === 'Date(' &&
+                        value.slice(-1) === ')') {
+                    d = new Date(value.slice(5, -1));
+                    if (d) {
+                        return d;
+                    }
+                }
+                return value;
+            });
+
+
+    This is a reference implementation. You are free to copy, modify, or
+    redistribute.
+*/
+
+/*jslint evil: true, strict: false, regexp: false */
+
+/*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
+    call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
+    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
+    lastIndex, length, parse, prototype, push, replace, slice, stringify,
+    test, toJSON, toString, valueOf
+*/
+
+
+// Create a JSON object only if one does not already exist. We create the
+// methods in a closure to avoid creating global variables.
+
+var JSON;
+if (!JSON) {
+    JSON = {};
+}
+
+(function () {
+    "use strict";
+
+    function f(n) {
+        // Format integers to have at least two digits.
+        return n < 10 ? '0' + n : n;
+    }
+
+    if (typeof Date.prototype.toJSON !== 'function') {
+
+        Date.prototype.toJSON = function (key) {
+
+            return isFinite(this.valueOf()) ?
+                this.getUTCFullYear()     + '-' +
+                f(this.getUTCMonth() + 1) + '-' +
+                f(this.getUTCDate())      + 'T' +
+                f(this.getUTCHours())     + ':' +
+                f(this.getUTCMinutes())   + ':' +
+                f(this.getUTCSeconds())   + 'Z' : null;
+        };
+
+        String.prototype.toJSON      =
+            Number.prototype.toJSON  =
+            Boolean.prototype.toJSON = function (key) {
+                return this.valueOf();
+            };
+    }
+
+    var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
+        escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
+        gap,
+        indent,
+        meta = {    // table of character substitutions
+            '\b': '\\b',
+            '\t': '\\t',
+            '\n': '\\n',
+            '\f': '\\f',
+            '\r': '\\r',
+            '"' : '\\"',
+            '\\': '\\\\'
+        },
+        rep;
+
+
+    function quote(string) {
+
+// If the string contains no control characters, no quote characters, and no
+// backslash characters, then we can safely slap some quotes around it.
+// Otherwise we must also replace the offending characters with safe escape
+// sequences.
+
+        escapable.lastIndex = 0;
+        return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
+            var c = meta[a];
+            return typeof c === 'string' ? c :
+                '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
+        }) + '"' : '"' + string + '"';
+    }
+
+
+    function str(key, holder) {
+
+// Produce a string from holder[key].
+
+        var i,          // The loop counter.
+            k,          // The member key.
+            v,          // The member value.
+            length,
+            mind = gap,
+            partial,
+            value = holder[key];
+
+// If the value has a toJSON method, call it to obtain a replacement value.
+
+        if (value && typeof value === 'object' &&
+                typeof value.toJSON === 'function') {
+            value = value.toJSON(key);
+        }
+
+// If we were called with a replacer function, then call the replacer to
+// obtain a replacement value.
+
+        if (typeof rep === 'function') {
+            value = rep.call(holder, key, value);
+        }
+
+// What happens next depends on the value's type.
+
+        switch (typeof value) {
+        case 'string':
+            return quote(value);
+
+        case 'number':
+
+// JSON numbers must be finite. Encode non-finite numbers as null.
+
+            return isFinite(value) ? String(value) : 'null';
+
+        case 'boolean':
+        case 'null':
+
+// If the value is a boolean or null, convert it to a string. Note:
+// typeof null does not produce 'null'. The case is included here in
+// the remote chance that this gets fixed someday.
+
+            return String(value);
+
+// If the type is 'object', we might be dealing with an object or an array or
+// null.
+
+        case 'object':
+
+// Due to a specification blunder in ECMAScript, typeof null is 'object',
+// so watch out for that case.
+
+            if (!value) {
+                return 'null';
+            }
+
+// Make an array to hold the partial results of stringifying this object value.
+
+            gap += indent;
+            partial = [];
+
+// Is the value an array?
+
+            if (Object.prototype.toString.apply(value) === '[object Array]') {
+
+// The value is an array. Stringify every element. Use null as a placeholder
+// for non-JSON values.
+
+                length = value.length;
+                for (i = 0; i < length; i += 1) {
+                    partial[i] = str(i, value) || 'null';
+                }
+
+// Join all of the elements together, separated with commas, and wrap them in
+// brackets.
+
+                v = partial.length === 0 ? '[]' : gap ?
+                    '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']' :
+                    '[' + partial.join(',') + ']';
+                gap = mind;
+                return v;
+            }
+
+// If the replacer is an array, use it to select the members to be stringified.
+
+            if (rep && typeof rep === 'object') {
+                length = rep.length;
+                for (i = 0; i < length; i += 1) {
+                    if (typeof rep[i] === 'string') {
+                        k = rep[i];
+                        v = str(k, value);
+                        if (v) {
+                            partial.push(quote(k) + (gap ? ': ' : ':') + v);
+                        }
+                    }
+                }
+            } else {
+
+// Otherwise, iterate through all of the keys in the object.
+
+                for (k in value) {
+                    if (Object.prototype.hasOwnProperty.call(value, k)) {
+                        v = str(k, value);
+                        if (v) {
+                            partial.push(quote(k) + (gap ? ': ' : ':') + v);
+                        }
+                    }
+                }
+            }
+
+// Join all of the member texts together, separated with commas,
+// and wrap them in braces.
+
+            v = partial.length === 0 ? '{}' : gap ?
+                '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}' :
+                '{' + partial.join(',') + '}';
+            gap = mind;
+            return v;
+        }
+    }
+
+// If the JSON object does not yet have a stringify method, give it one.
+
+    if (typeof JSON.stringify !== 'function') {
+        JSON.stringify = function (value, replacer, space) {
+
+// The stringify method takes a value and an optional replacer, and an optional
+// space parameter, and returns a JSON text. The replacer can be a function
+// that can replace values, or an array of strings that will select the keys.
+// A default replacer method can be provided. Use of the space parameter can
+// produce text that is more easily readable.
+
+            var i;
+            gap = '';
+            indent = '';
+
+// If the space parameter is a number, make an indent string containing that
+// many spaces.
+
+            if (typeof space === 'number') {
+                for (i = 0; i < space; i += 1) {
+                    indent += ' ';
+                }
+
+// If the space parameter is a string, it will be used as the indent string.
+
+            } else if (typeof space === 'string') {
+                indent = space;
+            }
+
+// If there is a replacer, it must be a function or an array.
+// Otherwise, throw an error.
+
+            rep = replacer;
+            if (replacer && typeof replacer !== 'function' &&
+                    (typeof replacer !== 'object' ||
+                    typeof replacer.length !== 'number')) {
+                throw new Error('JSON.stringify');
+            }
+
+// Make a fake root object containing our value under the key of ''.
+// Return the result of stringifying the value.
+
+            return str('', {'': value});
+        };
+    }
+
+
+// If the JSON object does not yet have a parse method, give it one.
+
+    if (typeof JSON.parse !== 'function') {
+        JSON.parse = function (text, reviver) {
+
+// The parse method takes a text and an optional reviver function, and returns
+// a JavaScript value if the text is a valid JSON text.
+
+            var j;
+
+            function walk(holder, key) {
+
+// The walk method is used to recursively walk the resulting structure so
+// that modifications can be made.
+
+                var k, v, value = holder[key];
+                if (value && typeof value === 'object') {
+                    for (k in value) {
+                        if (Object.prototype.hasOwnProperty.call(value, k)) {
+                            v = walk(value, k);
+                            if (v !== undefined) {
+                                value[k] = v;
+                            } else {
+                                delete value[k];
+                            }
+                        }
+                    }
+                }
+                return reviver.call(holder, key, value);
+            }
+
+
+// Parsing happens in four stages. In the first stage, we replace certain
+// Unicode characters with escape sequences. JavaScript handles many characters
+// incorrectly, either silently deleting them, or treating them as line endings.
+
+            text = String(text);
+            cx.lastIndex = 0;
+            if (cx.test(text)) {
+                text = text.replace(cx, function (a) {
+                    return '\\u' +
+                        ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
+                });
+            }
+
+// In the second stage, we run the text against regular expressions that look
+// for non-JSON patterns. We are especially concerned with '()' and 'new'
+// because they can cause invocation, and '=' because it can cause mutation.
+// But just to be safe, we want to reject all unexpected forms.
+
+// We split the second stage into 4 regexp operations in order to work around
+// crippling inefficiencies in IE's and Safari's regexp engines. First we
+// replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
+// replace all simple value tokens with ']' characters. Third, we delete all
+// open brackets that follow a colon or comma or that begin the text. Finally,
+// we look to see that the remaining characters are only whitespace or ']' or
+// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
+
+            if (/^[\],:{}\s]*$/
+                    .test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
+                        .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
+                        .replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
+
+// In the third stage we use the eval function to compile the text into a
+// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
+// in JavaScript: it can begin a block or an object literal. We wrap the text
+// in parens to eliminate the ambiguity.
+
+                j = eval('(' + text + ')');
+
+// In the optional fourth stage, we recursively walk the new structure, passing
+// each name/value pair to a reviver function for possible transformation.
+
+                return typeof reviver === 'function' ?
+                    walk({'': j}, '') : j;
+            }
+
+// If the text is not JSON parseable, then a SyntaxError is thrown.
+
+            throw new SyntaxError('JSON.parse');
+        };
+    }
+}());
--- a/src/main/resources/scripts/tracker.js	Tue Aug 23 16:42:51 2011 -0400
+++ b/src/main/resources/scripts/tracker.js	Tue Aug 23 16:43:08 2011 -0400
@@ -1,168 +1,214 @@
 
+var Const = {
+  KM : "km",
+  KM_UNIT : 1,
+  MILE_UNIT : 0.621371192,
+  MILE : "mile",
 
-function send(user, data) {
+  // wait for at least 2 consecutive GPS data before declaring the GPS ready
+  GPS_MAX_ERRORS : 2,
+};
+
+var Util = {
+  store : {
+    enabled : (function() {
+      try {
+       return !!window.localStorage.getItem;
+      } catch (e) {
+       return false;
+      }
+    })(),
+    set : function (key, value) {
+      try {
+        window.localStorage.setItem(key, JSON.stringify(value));
+        return true;
+      } catch (e) { };
+      return false;
+    },
+    get : function (key) {
+      try {
+        var value = window.localStorage.getItem(key);
+        return ((value != null)? JSON.parse(value) : null);
+      } catch (e) { };
+      return null;
+    }
+  },
+
+  log : function (msg) {
+    var element = document.getElementById("log");
+    if (element != null) element.textContent = msg;
+  },
+
+  // pretty formatting of numbers
+  formatNumber : function (n) {
+    return (n < 10)? "0" + n : n;
+  },
+
+  // pretty formatting of time
+  formatTime : function (time) {
+    t = parseInt(time);
+    hours = parseInt(t / 3600);
+    minutes = parseInt(t / 60);
+    seconds = t - ((hours * 3600) + (minutes * 60));
+    return ((hours > 0)?  Util.formatNumber(hours) + ":": "") + Util.formatNumber(minutes) + ":" + Util.formatNumber(seconds);
+  },
+
+  // send information to the server as JSON
+  sendAsJSON : function (uri, data) {
     var xhr = new XMLHttpRequest;
 
     try {
-    xhr.open("POST", "/user/"  + user + "/run", true);
+    xhr.open("POST", uri, true);
     xhr.onreadystatechange = function() {
         if (xhr.readyState == 4) {
             if (xhr.status != 200) { // this needs to be 201
-              document.getElementById("log").textContent = "xhr failed? [" + xhr.status + "] " + xhr.statusText;
+              Util.log("xhr failed? [" + xhr.status + "] " + xhr.statusText);
             } else {
-              document.getElementById("log").textContent = "resource created at " + xhr.getResponseHeader("Location");
+              Util.log("resource created at " + xhr.getResponseHeader("Location"));
             }
         } else {
-            document.getElementById("log").textContent = "xhr readyState is " + xhr.readyState;
+            Util.log("xhr readyState is " + xhr.readyState);
         }
     };
     xhr.setRequestHeader("Content-Type", "application/json");
     xhr.setRequestHeader("Content-Length", data.length);
 
-    xhr.send(data);
+    xhr.send(JSON.stringify(data));
 
     } catch (e) {
-      document.getElementById("log").textContent = "Failed to send to server " + e;
+      Util.log("Failed to send to server " + e);
       return false;
     }
    return true;
-}
-
-var storage = (function() {
-     try {
-       return !!window.localStorage.getItem;
-     } catch (e) {
-       return false;
-     }
-})();
-
-
-
-var watchId = 0;
-var running = false;
-
-var duration = 0;
-var start_time = 0;
-var intervalId = 0;
-
-// wait for at least 5 consecutive GPS data before declaring the GPS ready
-var MAX_ERRORS = 2;
-var got_error = MAX_ERRORS;
-
-var discarded = 0;
-var locations = 0;
-
-var coordinates = [];
+  },
 
-var dst_unit = 1;
-
-function formatNumber(n) {
-  return (n < 10)? "0" + n : n;
-}  
-
-function formatTime(time) {
- t = parseInt(time);
- hours = parseInt(t / 3600);
- minutes = parseInt(t / 60);
- seconds = t - ((hours * 3600) + (minutes * 60));
- return ((hours > 0)?  formatNumber(hours) + ":": "") + formatNumber(minutes) + ":" + formatNumber(seconds);
-}
+  geo : {
+    // calculate the distance in km between two GPS locations
+    calculateDistance : function (lat1, lon1, lat2, lon2) {
+      var dLat = (lat2-lat1) * Math.PI / 180;
+      var dLon = (lon2-lon1) * Math.PI / 180;
+      var lat1 = lat1  * Math.PI / 180;
+      var lat2 = lat2 * Math.PI / 180;
+      var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
+        Math.sin(dLon/2) * Math.sin(dLon/2) * Math.cos(lat1) * Math.cos(lat2);
+      // 6371 km is average earth radius 
+      return 6371 * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));      
+    },
+    
+    calculateDistanceCoordinates : function (events) {
+      var result = 0;
+      if (events.length > 0) {
+        var i = 1;
+        while (i < events.length) {
+          var position1 = events[i-1].c;
+          var position2 = events[i].c;
+          result += Util.geo.calculateDistance(position1[1], position1[0], position2[1], position2[0]);
+          i++;
+        }
+      }
+      return result;
+    },
+    // calculate the duration between geolocation coordinates
+    calculateDurationCoordinates : function (events) {
+      var result = 0;
+      if (events.length > 0) {
+        var i = 1;
+        while (i < events.length) {
+          result += (events[i].t - events[i-1].t);
+          i++;
+        }
+      }
+      return result;
+    }
+  }
+};
 
-
-
+var getUser = function () {
+    function dummyuser() {
+      this.name     =   "dummy";
+      this.weight   = "73";
+      this.height   = "180";
+      this.distance = "1";
+      this.prefs = { weight : "kg", height : "cm", distance : Const.KM };
+    }
+    var n = Util.store.get("track_gps_user");
+    if (n === null) n = new dummyuser();
+    n.getPostRunURI = function() { return "/user/" + this.name + "/run"; }
+    n.getProfileURI = function() { return "/user/" + this.name + "/profile"; }
+    n.setKm = function() { this.distance = Const.KM_UNIT;  this.prefs.distance = Const.KM; }
+    n.setMile = function() { this.distance = Const.MILE_UNIT;  this.prefs.distance = Const.MILE; }
+    n.save = function() {
+      Util.store.set("track_gps_user", this);
+    };
+        
+    return n; 
+};
 
-function pushCoordinates(position) {
-   coordinates[coordinates.length] =
-//    [ position.timestamp, position.coords.longitude, position.coords.latitude, position.coords.altitude, position.coords.speed ];
-    [ position.timestamp, position.coords.longitude, position.coords.latitude, position.coords.altitude ];
-}
+var app = {
 
-function pause() {
-   coordinates[coordinates.length] = [ Date.now(), "pause", 0, 0, 0, 0 ];
-}
+ user : getUser(),
 
-function getLastCoordinates() {
-   return (coordinates.length > 0)? coordinates[coordinates.length - 1] : null;
+ // identifier for geolocation watch operation
+ watchId : 0,
+
+ // is an activity ongoing?
+ inActivity : false,
+
+ // total real time duration
+ duration : 0,
+ // start_time since start or pause
+ start_time : 0,
+
+ // identifier for setInterval timer operation
+ intervalId : 0,
+
+ // got_errors counts how many we've got
+ got_error : Const.GPS_MAX_ERRORS,
+ 
+ // total of geolocation data discarded
+ discarded : 0,
+
+ // total of geolocation data accepted
+ locations : 0,
+
+ // this will store all the geolocation data and pause
+ currentActivity : { activity: "http://dbpedia.org/resource/Running", events: []},
+
+};
+
+// add a geolocation position into the current activity
+app.coordinates_event = function (activity, position) {
+   var events = activity.events;
+   events[events.length] =
+    { t:position.timestamp, c: [position.coords.longitude, position.coords.latitude, position.coords.altitude] };
 }
 
-function getCoordinates() {
-  if (coordinates.length > 0 && !running) {
-    var result = "[";
-    var i = 0;
-    while (i < coordinates.length) {
-      var position = coordinates[i];
-      var j = 1;
-      result += "[" + position[0];
-      while (j < position.length) result += "," + position[j++];      
-      result += "]";
-      i++;
-      if (i < coordinates.length) result += ",";
-    }
-    return result + "]";
-  }
-  return null;
-}
-
-function calculateDistance(lat1, lon1, lat2, lon2) {
- var R = 6371; // km
- var dLat = (lat2-lat1) * Math.PI / 180;
- var dLon = (lon2-lon1) * Math.PI / 180;
- var lat1 = lat1  * Math.PI / 180;
- var lat2 = lat2 * Math.PI / 180;
- var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
-        Math.sin(dLon/2) * Math.sin(dLon/2) * Math.cos(lat1) * Math.cos(lat2); 
- var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 
- var d = R * c;
- return d;
+// add a pause event into the current activity
+app.pause_event = function (activity) {
+   var events = activity.events;
+   events[events.length] = { t:Date.now(), s: [ "pause" ] };
 }
-
-function calculateDistanceCoordinates() {
-  var result = 0;
-  if (coordinates.length > 0) {
-    var i = 1;
-    while (i < coordinates.length) {
-      var position1 = coordinates[i-1];
-      var position2 = coordinates[i];
-      result += calculateDistance(position1[2], position1[1], position2[2], position2[1]);
-      i++;
-    }
-  }
-  return result;
-}
-
-function calculateDurationCoordinates() {
-  var result = 0;
-  if (coordinates.length > 0) {
-    var i = 1;
-    while (i < coordinates.length) {
-      var position1 = coordinates[i-1];
-      var position2 = coordinates[i];
-      result += (position2[0]- position1[0]);
-      i++;
-    }
-  }
-  return result;
-}
-
-function repaint() {
-  if (document.visibilityState == true && running) {
-    document.getElementById("locations").textContent = String(locations);
-    var d = calculateDistanceCoordinates() * dst_unit;
-    var t = duration + (Date.now() - start_time);
+// simply refresh the current screen data
+app.repaint = function () {
+  if (document.visibilityState && app.inActivity) {
+    document.getElementById("locations").textContent = String(app.locations);
+    var d = Util.geo.calculateDistanceCoordinates(app.currentActivity.events) * app.user.distance;
+    var t = app.duration + (Date.now() - app.start_time);
     document.getElementById("distance").textContent = String(Math.round(d*100)/100);
     if (t != 0 && d != 0) {
       document.getElementById("speed").textContent = String(Math.round( (d / (t / 3600000)) * 100) / 100);
       document.getElementById("pace").textContent = String(Math.round( ((t / 60000)/d) * 100) / 100);
     }
-    if (coordinates.length > 0) {
+    if (app.currentActivity.events.length > 0) {
       document.getElementById("gps_text").style.display = "none";
       document.getElementById("gps_data").style.display = "inline";
     }
   }
 }
 
-function logGPS(position, startMsg) {
-    document.getElementById("log").textContent = 
+// Display a GPS location in the page
+app.logGPS = function (position, startMsg) {
+    Util.log(
       startMsg + position.timestamp 
        + ": " + position.coords.latitude
        + ", " + position.coords.longitude
@@ -170,34 +216,36 @@
        + ", " + position.coords.accuracy
        + ", " + position.coords.altitudeAccuracy
        + ", " + position.coords.heading
-       + ", " + position.coords.speed;
+       + ", " + position.coords.speed);
 }
 
-function handleSuccess(position) {
-  if (running) {
-   logGPS(position, "GPS: ");
 
-    // discard positions that have no altitude since they're likely inacurate
+// when watchPosition is successful at returning a GPS coordinate
+app.handleSuccess = function (position) {
+  if (app.inActivity) {
+   app.logGPS(position, "GPS: ");
+
+    // discard positions with no altitude since they're likely inaccurate
     if (position.coords.altitude != null) {
-      pushCoordinates(position);
-      locations++;
-      repaint();
+      app.coordinates_event(app.currentActivity, position);
+      app.locations++;
+      app.repaint();
     } else {
-      document.getElementById("discarded").textContent = String(discarded++);
+      document.getElementById("discarded").textContent = String(app.discarded++);
     }
    } else {
 
 
      if (position.coords.altitude == null) {
-       got_error++;
-       if (got_error > MAX_ERRORS) got_error = MAX_ERRORS;
-           logGPS(position, "[ERROR] GPS: ");
+       app.got_error++;
+       if (app.got_error > Util.GPS_MAX_ERRORS) app.got_error = Util.GPS_MAX_ERRORS;
+           app.logGPS(position, "[ERROR] GPS: ");
      } else {
-       got_error--;
-       logGPS(position, "GPS: ");
+       app.got_error--;
+       app.logGPS(position, "GPS: ");
      }
-     if (got_error <= 0) {
-       got_error = 0;
+     if (app.got_error <= 0) {
+       app.got_error = 0;
        document.getElementById("gps_text").textContent = "ready";       
        document.getElementById("waves").style.display = "block";       
      } else {
@@ -207,7 +255,8 @@
    }
 }
 
-function handleError(error) {
+// when watchPosition is not successful at returning a GPS coordinate
+app.handleError = function (error) {
   var code = "unknown";
   switch(error.code) {
     case error.TIMEOUT:
@@ -220,90 +269,82 @@
       code = "position unavailable";
       break;
   }
-  if (running) {
-    document.getElementById("errors").textContent = String(++got_error);
-    document.getElementById("log").textContent = "[ERROR] GPS: " + code; 
+  if (app.inActivity) {
+    document.getElementById("errors").textContent = String(++app.got_error);
+    Util.log("[ERROR] GPS: " + code); 
   } else {
     document.getElementById("gps_text").textContent = code; 
-    // wait for 5 non-consecutive errors
-    got_error = MAX_ERRORS;
+    // wait for MAX_ERRORS non-consecutive errors
+    app.got_error = Util.GPS_MAX_ERRORS;
   }
 }
 
-function timer() {
-  if (document.visibilityState == true) {
+// Called by setInterval to display the real time
+app.timer = function () {
+  if (document.visibilityState) {
     document.getElementById("realtime").textContent = 
-      formatTime(Math.round((duration+(Date.now()-start_time))/1000));
+      Util.formatTime(Math.round((app.duration+(Date.now()-app.start_time))/1000));
   }
 }
 
-function start() {
-  if (!running) {
-   running = true;
-   start_time = Date.now();
-   intervalId = setInterval(timer, 1000);
+// The Start / Pause button
+app.start = function () {
+  if (!app.inActivity) {
+    // start an activity
+   app.inActivity = true;
+   app.start_time = Date.now();
+   app.intervalId = setInterval(app.timer, 1000);
    document.getElementById("stop").disabled = false;
    document.getElementById("start").textContent = "Pause";
   } else {
-   running = false;
-   clearInterval(intervalId);
-   duration += (Date.now() - start_time);
+   // pause an activity
+   app.inActivity = false;
+   clearInterval(app.intervalId);
+   app.duration += (Date.now() - app.start_time);
    document.getElementById("start").textContent = "Restart";
-   pause();
+   app.pause_event(app.activity);
    document.getElementById("gps_text").style.display = "inline";
    document.getElementById("gps_data").style.display = "none";
   }
 }
 
-function stop() {
-  navigator.geolocation.clearWatch(watchId);
-  running = false;
-  clearInterval(intervalId);
-  got_error = 0;
-  locations = 0;
-  discarded = 0;
-  duration  = 0;
+// The Stop button
+app.stop = function () {
+  app.inActivity = false;
+  navigator.geolocation.clearWatch(app.watchId);
+  clearInterval(app.intervalId);
+  app.got_error = 0;
+  app.locations = 0;
+  app.discarded = 0;
+  app.duration  = 0;
   document.getElementById("start").textContent = "Start";
   document.getElementById("stop").disabled = true;
-  document.getElementById("log").textContent = "";
-  var coords = getCoordinates();
-  if (coords != null && storage) {
-    try {
-      window.localStorage.setItem("track_gps_app", coords);
-    } catch (e) {
-      document.getDocumentById("log").textContent = "[ERROR] Can't store the value " + e.code;
-    }
-  }
-  if (coords != null) {
-    if (!send("teole",coords)) {      
-      // do something!      
+  Util.log("");
+  if (!Util.sendAsJSON(app.user.getPostRunURI(),app.currentActivity)) {      
+    if (!Util.store.set("track_gps_app", app.currentActivity)) {
+      Util.log("[ERROR] Can't store the value " + e.code);
     }
   }
-  coordinates = [];
+  app.currentActivity.events = [];
 }
 
-function init() {  
+app.init = function () {  
   if (!!document.visibilityState)
-    document.addEventListener("visibilitychange", repaint, false);
+    document.addEventListener("visibilitychange", app.repaint, false);
   else
     document.visibilityState = true;
-
-//  send("teole", "[4,5,6]");
-//  return false;
+  
+  // send("teole", "{ activity:\"http://dbpedia.org/resource/Running\", events: [ {t: 1314049555597, c: [-71.09068298339844,42.361671924591064,66] },{t: 1314049559622,s: \"pause\"}]}");
+  // return false;
 
   // @@ in the future, make sure this is empty
-   if (storage) {
-    window.localStorage.setItem("track_gps_app", "");
-
-    if (window.localStorage.getItem("track_gps_app_dst_unit") === "mile") {
-      dst_unit = 0.621371192;    
-    }
-    setUnit();
+   if (Util.store.set("track_gps_app", "")) {
+    app.setUnit();
    } else {
-     document.getElementById("log").textContent = "[ERROR] no local storage";
+     Util.log("[ERROR] no local storage");
    }
    if (!!navigator.geolocation) {
-     watchId = navigator.geolocation.watchPosition(handleSuccess, handleError, {enableHighAccuracy:true, maximumAge:0, timeout:1000});
+     app.watchId = navigator.geolocation.watchPosition(app.handleSuccess, app.handleError, {enableHighAccuracy:true, maximumAge:0, timeout:1000});
    } else {
      document.getElementById("gps_text").textContent = "not supported";
      document.getElementById("start").disabled = true;
@@ -311,31 +352,26 @@
 
 }
 
-window.addEventListener("load", init, false);
+window.addEventListener("load", app.init, false);
 
-function km() {
-  if (storage) {
-    window.localStorage.setItem("track_gps_app_dst_unit", "km");
-  }
-  dst_unit = 1;
-  setUnit();
-  repaint();
+app.km = function () {
+  app.user.setKm();
+  app.user.save();
+  app.setUnit();
+  app.repaint();
 }
 
-function mile() {
-  if (storage) {
-    window.localStorage.setItem("track_gps_app_dst_unit", "mile");
-  }
-  dst_unit = 0.621371192;    
-  setUnit();
-  repaint();
+app.mile = function () {
+  app.user.setMile();
+  app.user.save();
+  app.setUnit();
+  app.repaint();
 }
 
-function setUnit() {  
-  var text = (dst_unit == 0.621371192)? "mile" : "km";
-  var nodes = document.getElementsByClassName("dst_unit");
+app.setUnit = function () {  
+  var nodes = document.getElementsByClassName("distance_unit");
   i = 0;
   do {
-    nodes[i].textContent = text;
+    nodes[i].textContent = app.user.prefs.distance;
   } while (++i < nodes.length);
 }
--- a/src/main/resources/templates/geolocation.ssp	Tue Aug 23 16:42:51 2011 -0400
+++ b/src/main/resources/templates/geolocation.ssp	Tue Aug 23 16:43:08 2011 -0400
@@ -1,12 +1,14 @@
 <!DOCTYPE html>
 <html lang='en' xmlns='http://www.w3.org/1999/xhtml'>
-<!-- manifest='geolocation.manifest'> -->
+<!-- manifest='/manifest/tracker.manifest'> -->
 <head>
  <meta charset='utf-8' />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width,initial-scale=1.0" />
  <link rel='icon' type='image/png' href='geolocation-icon.png'/>
  <title>HTML5 Track</title>
+ <script src='/scripts/json2.js'>
+ </script>
  <script src='/scripts/tracker.js'>
  </script>
  <link rel="stylesheet" href="/styles/tracker.css" type="text/css" />
@@ -50,16 +52,16 @@
 <table class='text'>
 <tbody>
 <tr>
-<th>Distance</th> <td id='distance'>0</td><td class='dst_unit'>km</td>
+<th>Distance</th> <td id='distance'>0</td><td class='distance_unit'>km</td>
 </tr>
 <tr>
 <th>Time</th><td id='realtime'>00:00</td><td></td>
 </tr>
 <tr>
-<th>Speed</th><td id='speed'>0</td><td><span class='dst_unit'>km</span>/h</td>
+<th>Speed</th><td id='speed'>0</td><td><span class='distance_unit'>km</span>/h</td>
 </tr>
 <tr>
-<th>Pace</th><td id='pace'>0</td><td>min/<span class='dst_unit'>km</span></td>
+<th>Pace</th><td id='pace'>0</td><td>min/<span class='distance_unit'>km</span></td>
 </tr>
 <tr>
 <th>GPS</th><td colspan='2'><span id='gps_text'>not started</span><span id='gps_data'><span id='errors'>0</span>/<span id='discarded'>0</span>/<span id='locations'>0</span></span></td>
@@ -70,10 +72,10 @@
 <section>
 <p>
 <button type='button' id='start'
-  onclick='start()'>Start</button>
+  onclick='app.start()'>Start</button>
 
 <button type='button' id='stop' disabled='disabled'
-  onclick='stop()'>Stop</button>
+  onclick='app.stop()'>Stop</button>
 
 </p>
 
@@ -86,9 +88,9 @@
 <p class='text'>Current unit: <span class='dst_unit'>km</span></p>
 
 <p>
-<button type='button' id='start' onclick='km()'>KM</button>
+<button type='button' id='start' onclick='app.km()'>KM</button>
 
-<button type='button' id='stop' onclick='mile()'>MILE</button>
+<button type='button' id='stop' onclick='app.mile()'>MILE</button>
 </p>
 
 </section>
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/resources/templates/index.html	Tue Aug 23 16:43:08 2011 -0400
@@ -0,0 +1,130 @@
+<!doctype html>
+<html lang="en">
+<head>
+	<meta charset="utf-8">
+	<title>Virtual Trainer</title>
+	
+	<style type="text/css">
+		#stats li h2 { display: inline }
+	</style>
+	
+	<script src="http://www.openlayers.org/api/OpenLayers.js" type="text/javascript"></script>
+	<script src="http://www.openstreetmap.org/openlayers/OpenStreetMap.js" type="text/javascript"></script>
+	
+	<script type="text/javascript">
+		var lat=42.412704
+		var lon=-71.140267
+		var zoom=13
+		var map;
+		function init() {
+			map = new OpenLayers.Map ("map", {
+				controls:[
+					new OpenLayers.Control.Navigation(),
+					new OpenLayers.Control.PanZoomBar(),
+					//new OpenLayers.Control.LayerSwitcher(),
+					//new OpenLayers.Control.Attribution()
+					],
+				//maxExtent: new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
+				//maxResolution: 156543.0399,
+				//zoom: 2,
+				numZoomLevels: 5,
+				minZoomLevel: 5,
+				//units: 'm',
+				projection: new OpenLayers.Projection("EPSG:900913"),
+				displayProjection: new OpenLayers.Projection("EPSG:4326")
+			} );
+ 
+			map.addLayer(new OpenLayers.Layer.OSM());
+			// Add the Layer with the GPX Track
+			var lgpx = new OpenLayers.Layer.GML("Aug-10-11.gpx", "Aug-10-11.gpx", {
+				format: OpenLayers.Format.GPX,
+				style: {strokeColor: "green", strokeWidth: 5, strokeOpacity: 0.5},
+				projection: new OpenLayers.Projection("EPSG:4326")
+			});
+			map.addLayer(lgpx);
+			var lgpx2 = new OpenLayers.Layer.GML("Jun-26-11.gpx", "Jun-26-11.gpx", {
+				format: OpenLayers.Format.GPX,
+				style: {strokeColor: "blue", strokeWidth: 5, strokeOpacity: 0.5},
+				projection: new OpenLayers.Projection("EPSG:4326")
+			});
+			map.addLayer(lgpx2);
+ 
+			var lonLat = new OpenLayers.LonLat(lon, lat).transform(new OpenLayers.Projection("EPSG:4326"), map.getProjectionObject());
+			map.setCenter(lonLat, zoom);
+ 
+			//map.setCenter(new OpenLayers.LonLat(0, 0), 5);
+			//map.zoomToMaxExtent();
+			//var size = new OpenLayers.Size(21, 25);
+			//var offset = new OpenLayers.Pixel(-(size.w/2), -size.h);
+			//var icon = new OpenLayers.Icon('http://www.openstreetmap.org/openlayers/img/marker.png',size,offset);
+			//layerMarkers.addMarker(new OpenLayers.Marker(lonLat,icon));
+		}
+		
+		var jsonData;
+		var http = new XMLHttpRequest();
+		http.open('GET','Aug-10-11.json',false);
+		http.onreadystatechange = function () {
+			console.log("state: " + http.readyState);
+			if(http.readyState == 4){
+				//console.log(http.responseText);
+				jsonData = eval('(' + http.responseText + ')');
+			}
+		};
+		http.send(null);
+		console.log(jsonData.events[0].c[0]);
+		
+		getBounds(jsonData);
+		
+		function getBounds(json) {
+			for (i=0; i < json.events.length; i++) {
+				console.log(json.events[i]);
+			}
+		}
+	</script>
+ 
+</head>
+<body onload="init();" >
+	
+	<div id="history">
+		<h1>History</h1>
+		<ul>
+			<li><a href="#">Workout1</a></li>
+			<li><a href="#">Workout2</a></li>
+		</ul>
+	</div>
+	<div id="stats">
+		<h1>Stats</h1>
+		<ul>
+			<li>
+				<h2>Date</h2>
+				<span>Aug 10 11</span>
+			</li>
+			<li>
+				<h2>Start Time</h2>
+				<span>06:13:35</span>
+			</li>
+			<li>
+				<h2>Elapsed Time</h2>
+				<span>36'16"</span>
+			</li>
+			<li>
+				<h2>Distance</h2>
+				<span>4.13 mile</span>
+			</li>
+			<li>
+				<h2>Avg Pace</h2>
+				<span>8'46" min/mile</span>
+			</li>
+			<li>
+				<h2>Avg Speed</h2>
+				<span>6.84 mph</span>
+			</li>
+			<li>			
+				<h2>Ascent/Climb</h2>
+				<span>698 ft</span>
+			</li>
+		</ul>
+	</div>
+	<div id="map" style="width:500px; height:300px"></div>
+</body>
+</html>
\ No newline at end of file