I've added a proposal of schema, probably still vastly incomplete

.gitignore

@@ -0,0 +1,3 @@
+.idea/
+bower_components/
+node_modules/

package.json

@@ -7,8 +7,6 @@
 	},
 	"dependencies": {
 		"express": "3.3.4",
-		"jade": "*",
-		"ejs": "~0.8.4",
 		"lodash": "~1.3.1",
 		"when": "~2.3.0",
 		"firebase": "~0.6.3"

schema/schema.json

@@ -0,0 +1,137 @@
+{
+    "users" : {
+        "joebloggs" : {
+            "name" : "Joe",
+            "surname" : "Bloggs",
+            "reputation" : 0,
+            "level" : 1,
+            "twitter" : "@joeblog04",
+            "email" : "joe@bloggs.za",
+            "bio" : "A normal dude",
+            "picture" : "09.jpg"
+        },
+        "bernardone" : {
+            "name" : "Bernardo",
+            "surname" : "Bertolucci",
+            "screen_name" : "bernardone",
+            "reputation" : 4,
+            "level" : 1,
+            "twitter" : "@bernardbert",
+            "email" : "bbrb@gmail.com",
+            "bio" : "Professional reporter",
+            "picture" : "bbernardone.jpg"
+        }
+    },
+    "updates" : {
+        "ufo_sighting" : {
+            "title" : "UFO sighting",
+            "reporter" : 1,
+            "description" : "Saw a flying saucepan earlier today",
+            "time" : 1378743848616,
+            "timezone" : "BST",
+            "location" : [51.505300, -0.165477],
+            "media" : {
+                "media_video" : [],
+                "media_pictures" : [],
+                "media_audio" : [],
+                "media_links" : []
+            },
+            "tags" : ["awesome", "UFO"],
+            "importance" : 1,
+            "editable" : false,
+            "upvotes" : 2,
+            "downvotes" : 2
+        },
+        "another_ufo_sighting" : {
+            "title" : "Another UFO sighting",
+            "reporter" : 1,
+            "description" : "Really really there was a flying saucepan, ain't kiddin'",
+            "time" : 1378743849619,
+            "timezone" : "BST",
+            "location" : [51.505309, -0.165487],
+            "media" : {
+                "media_video" : [],
+                "media_pictures" : [],
+                "media_audio" : [],
+                "media_links" : []
+            },
+            "tags" : ["awesome", "UFO"],
+            "importance" : 0,
+            "editable" : false,
+            "upvotes" : 0,
+            "downvotes" : 0
+        },
+        "strange_light_in_the_sky" : {
+            "title" : "Strange light in the sky",
+            "reporter" : 3,
+            "description" : "There is an UFO hovering over London",
+            "time" : 1378743848821,
+            "timezone" : "BST",
+            "location" : [51.505955, -0.14863],
+            "media" : {
+                "media_video" : [],
+                "media_pictures" : [],
+                "media_audio" : [],
+                "media_links" : []
+            },
+            "tags" : ["strange"],
+            "importance" : 1,
+            "editable" : false,
+            "upvotes" : 2,
+            "downvotes" : 2
+        },
+        "topshop_sale" : {
+            "title" : "Topshop sale",
+            "reporter" : 1,
+            "description" : "Oxford Circus's topshop has announced a sale",
+            "time" : 1378743848616,
+            "timezone" : "BST",
+            "location" : [51.505300, -0.165477],
+            "media" : {
+                "media_video" : [],
+                "media_pictures" : [],
+                "media_audio" : [],
+                "media_links" : []
+            },
+            "tags" : ["awesome"],
+            "importance" : 1,
+            "editable" : false,
+            "upvotes" : 0,
+            "downvotes" : 0
+        }
+    },
+    "reports" : {
+        "london_ufo_sightings_of_sept_2013" : {
+            "name" : "London ufo sightings of sept 2013",
+            "description" : "A spate of ufo sightings",
+            "reporter" : "joebloggs",
+            "updates" : [2,5,10],
+            "time_start" : 1378743848616,
+            "time_end" : null,
+            "timezone" : "BST",
+            "location" : [51.505300, -0.165477],
+            "tags" : ["awesome"],
+            "importance" : 2,
+            "upvotes" : 3,
+            "downvotes" : 2,
+            "editable" : true,
+            "category" : "custom"
+        },
+        "topshop_sale" : {
+            "name" : "Topshop sale",
+            "description" : "Big sale in town",
+            "reporter" : "joebloggs",
+            "updates" : [15],
+            "time_start" : 1433804400000,
+            "time_end" : 1381359600000,
+            "timezone" : "BST",
+            "location" : [51.515366, -0.141344],
+            "tags" : ["awesome"],
+            "importance" : 2,
+            "upvotes" : 3,
+            "downvotes" : 2,
+            "editable" : true,
+            "category" : "around town"
+        }
+    }
+}

src/Report.js

@@ -8,17 +8,23 @@ var Model = require('./util/Model');
  */
 module.exports = Model.extend({
 
+    name : 'report',
+
 	defaults: {
-		title: '',
-		description: '',
-		location: [0, 0],
-		timeFrom: 0,
-		timeTo: Infinity,
-		timeExceptions: [],
-		updates: [
-			// { contentType, content, ... }
-		],
-		tags: []
+        "name" : "Unnamed event",
+        "description" : "",
+        "reporter" : 1,
+        "updates" : [],
+        "time_start" : 1433804400000,
+        "time_end" : 1381359600000,
+        "timezone" : "GMT",
+        "location" : [0,0],
+        "tags" : [],
+        "importance" : 0,
+        "upvotes" : 0,
+        "downvotes" : 0,
+        "editable" : true,
+        "category" : ""
 	},
 
 	init: function() {

src/User.js

@@ -2,19 +2,26 @@
 
 var Model = require('./util/Model');
 
+
 /**
  * 1st Class Entity under Yip
  * A User
  */
 var User = Model.extend({
 
+    name: 'user',
+
 	ref: 'https://{firebaseName}.firebaseio.com/users/{id}',
 
 	defaults: {
-		id: null,
-		name: '',
-		email: '',
-		twitter: ''
+        "name" : "",
+        "surname" : "",
+        "reputation" : 0,
+        "level" : 1,
+        "twitter" : "",
+        "email" : "",
+        "bio" : "",
+        "picture" : ""
 	},
 
 	init: function() {

src/util/Model.js

@@ -3,6 +3,7 @@
 var _ = require('lodash');
 var when = require('when');
 var Firebase = require('firebase');
+var Validation = require('./Validation');
 
 var hasOwn = {}.hasOwnProperty;
 var toString = {}.toString;
@@ -13,7 +14,9 @@ module.exports = Model;
  * Model Class
  */
 function Model(data, engine) {
+
 	this.data = _.extend({}, this.defaults, data || {});
+
 	this.engine = engine;
 
 	this._isSynced = false; // is synced to db via engine?
@@ -26,6 +29,8 @@ function Model(data, engine) {
 	this.__initPromise__ = this._spawnPromise(function(resolve, reject, notify) {
 		// This
 	});
+
+    this.validation = new Validation(this);
 }
 
 /**
@@ -72,13 +77,22 @@ _.extend(Model.prototype, {
 	defaults: {},
 
 	set: function(k, v) {
+
 		if (toString.call(k) === '[object Object]') {
 			for (var i in k) {
 				if (hasOwn.call(k, i)) {
+                    if (k[i] && this.rules && this.rules[i] && !this.rules[i].call(this, k[i])) {
+                        console.error("Invalid data for ", k[i]);
+                        continue;
+                    }
 					this.data[i] = k[i];
 				}
 			}
 		} else {
+            if (v && this.rules && this.rules[k] && !this.rules[k].call(this, v)) {
+                console.error("Invalid data for ", v);
+                return false;
+            }
 			this.data[k] = v;
 		}
 	},

src/util/validation.js

@@ -0,0 +1,33 @@
+var rules = require('./validationRules');
+
+//TODO: sanitation, error messages
+var Validation = function(model) {
+
+    var modelRuleSet = model.name ? rules[model.name] : rules,
+        hasOwn = {}.hasOwnProperty,
+        key, ruleString, func = 'var value = arguments[0];\r\n var isValid=true;\r\n', str;
+
+    model.rules = model.rules || {};
+
+    for (var i in model.defaults) {
+        if (hasOwn.call(model.defaults, i) && modelRuleSet[i]) {
+            func = 'var isValid=true;\r\n';
+            ruleString = modelRuleSet[i].split(', ');
+            for (var a = 0, len = ruleString.length ; a < len ; a++) {
+                str = ruleString[a].trim();
+                if(!str.indexOf('is ')) {
+                    func += ' if (typeof value !== "' + str.substr(3) + '"){isValid = false}\r\n';
+                } else if (!str.indexOf('test ')) {
+                    func += ' if (!' + str.substr(5) + '.test(value)){isValid = false}\r\n';
+                } else if (!str.indexOf('assert ')) {
+                    func += ' if (!value' + str.substr(7) + '){isValid = false}\r\n';
+                }
+            }
+            func += 'return isValid;';
+
+            model.rules[i] = new Function('value', func);
+        }
+    }
+};
+
+module.exports = Validation;

src/util/validationRules.js

@@ -0,0 +1,24 @@
+var validationRules = {
+    user : {
+        "name" : "is string, assert .length>0",
+        "surname" : "is string",
+        "reputation" : "is number",
+        "level" : "is number, assert >0",
+        "twitter" : "is string, test /^@?(\w){1,15}$/",
+        "email" : "is string",
+        "bio" : "is string",
+        "picture" : "is string"
+    },
+
+    report : {
+        "updates" : "is array",
+        "time_start" : "is number",
+        "time_end" : "is number",
+        "location" : "is array",
+        "tags" : "is array",
+        "editable" : "is boolean"
+    }
+
+};
+
+module.exports = validationRules;

src/yip.js

@@ -54,16 +54,17 @@ yip.Engine = function YipEngine(config) {
 console.log('Start');
 
 var y = new yip.Engine({
-	firebase: 'jp1990'
+	//firebase: 'jp1990'
+	firebase: 'bc2013'
 });
 
-var u = y.User.fromId('x43424');
+var u = y.User.fromId('joebloggs');
 
 u.then(function(user) {
 	console.log('Ok got something', user.get());
 
 	user.on('change', function() {
-		console.log('Something has changed!', user.get());;
+		console.log('Something has changed!', user.get());
 	});
 });