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File: b00_breeze.dataService.mongo.js

(function(factory) {
    if (typeof require === "function" && typeof exports === "object" && typeof module === "object") {
        // CommonJS or Node: hard-coded dependency on "breeze"
        factory(require("breeze"));
    } else if (typeof define === "function" && define["amd"] && !breeze) {
        // AMD anonymous module with hard-coded dependency on "breeze"
        define(["breeze"], factory);
    } else {
        // <script> tag: use the global `breeze` object
        factory(breeze);
    }    
}(function(breeze) {
       
    var core = breeze.core;

    var MetadataStore = breeze.MetadataStore;
    var JsonResultsAdapter = breeze.JsonResultsAdapter;
    var AbstractDataServiceAdapter = breeze.AbstractDataServiceAdapter;

    var ajaxImpl;

    function fmtOData(val) {
        return val == null ? null : "'" + val + "'" ; 
    } 

    function getNextObjectId() {
        return new ObjectId().toString();
    }

    var ctor = function () {
        this.name = "mongo";
        breeze.DataType.MongoObjectId = breeze.DataType.addSymbol({
            defaultValue: "",
            fmtOData: fmtOData,
            getNext: getNextObjectId
        });
    };

    ctor.prototype = new AbstractDataServiceAdapter();
    
    ctor.prototype._prepareSaveBundle = function(saveBundle, saveContext) {
        var em = saveContext.entityManager;
        var metadataStore = em.metadataStore;
        var helper = em.helper;
        var metadata = {};
        
        saveBundle.entities = saveBundle.entities.map(function (e) {
            var rawEntity = helper.unwrapInstance(e);
            var entityTypeName = e.entityType.name;
            var etInfo = metadata[entityTypeName];
            if (!etInfo) {
                etInfo = {};
                var entityType = e.entityType;
                etInfo.dataProperties = entityType.dataProperties.map(function(dp) {
                    var p = { name: dp.nameOnServer, dataType: dp.dataType.name };
                    if (dp.relatedNavigationProperty != null) {
                        p.isFk = true;
                    }
                    if (dp.concurrencyMode && dp.concurrencyMode === "Fixed") {
                        p.isConcurrencyProp = true;
                    }
                    return p;
                });
                if (entityType.autoGeneratedKeyType !== AutoGeneratedKeyType.None) {
                    etInfo.autoGeneratedKey = {
                        propertyName: entityType.keyProperties[0].nameOnServer,
                        autoGeneratedKeyType: entityType.autoGeneratedKeyType.name
                    };
                }
                metadata[entityTypeName] = etInfo;
            }
            var originalValuesOnServer = helper.unwrapOriginalValues(e, metadataStore);
            var rawAspect = {
                entityTypeName: e.entityType.name,
                defaultResourceName: e.entityType.defaultResourceName,
                entityState: e.entityAspect.entityState.name,
                originalValuesMap: originalValuesOnServer
            };           
                
            rawEntity.entityAspect = rawAspect;
            return rawEntity;
        });

        saveBundle.metadata = metadata;
        saveBundle.saveOptions = { tag: saveBundle.saveOptions.tag };

        return saveBundle;
    }

    ctor.prototype._prepareSaveResult = function (saveContext, data) {
        
        var em = saveContext.entityManager;
        var keys = data.insertedKeys.concat(data.updatedKeys, data.deletedKeys);
        var entities = keys.map(function (key) {
            return em.getEntityByKey(key.entityTypeName, key._id);
        });
        return { entities: entities, keyMappings: data.keyMappings, XHR: data.XHR };
    }


    ctor.prototype.jsonResultsAdapter = new JsonResultsAdapter({
        name: "mongo",

        visitNode: function (node, mappingContext, nodeContext) {
            if (node == null) return {};
            var result = {};
            // this will only be set on saveResults and projections.
            if (node.$type) {
                result.entityType = mappingContext.entityManager.metadataStore._getEntityType(node.$type, true);
            }
            return result;
        }
    });

    /*
    *
    * Copyright (c) 2011 Justin Dearing (zippy1981@gmail.com)
    * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
    * and GPL (http://www.opensource.org/licenses/gpl-license.php) version 2 licenses.
    * This software is not distributed under version 3 or later of the GPL.
    *
    * Version 1.0.0
    *
    */

    /**
     * Javascript class that mimics how WCF serializes a object of type MongoDB.Bson.ObjectId
     * and converts between that format and the standard 24 character representation.
    */
    var ObjectId = (function () {
        var increment = 0;
        var pid = Math.floor(Math.random() * (32767));
        var machine = Math.floor(Math.random() * (16777216));

        if (typeof (localStorage) != 'undefined') {
            var mongoMachineId = parseInt(localStorage['mongoMachineId']);
            if (mongoMachineId >= 0 && mongoMachineId <= 16777215) {
                machine = Math.floor(localStorage['mongoMachineId']);
            }
            // Just always stick the value in.
            localStorage['mongoMachineId'] = machine;
            document.cookie = 'mongoMachineId=' + machine + ';expires=Tue, 19 Jan 2038 05:00:00 GMT'
        }
        else {
            var cookieList = document.cookie.split('; ');
            for (var i in cookieList) {
                var cookie = cookieList[i].split('=');
                if (cookie[0] == 'mongoMachineId' && cookie[1] >= 0 && cookie[1] <= 16777215) {
                    machine = cookie[1];
                    break;
                }
            }
            document.cookie = 'mongoMachineId=' + machine + ';expires=Tue, 19 Jan 2038 05:00:00 GMT';

        }

        return function () {
            if (!(this instanceof ObjectId)) {
                return new ObjectId(arguments[0], arguments[1], arguments[2], arguments[3]).toString();
            }

            if (typeof (arguments[0]) == 'object') {
                this.timestamp = arguments[0].timestamp;
                this.machine = arguments[0].machine;
                this.pid = arguments[0].pid;
                this.increment = arguments[0].increment;
            }
            else if (typeof (arguments[0]) == 'string' && arguments[0].length == 24) {
                this.timestamp = Number('0x' + arguments[0].substr(0, 8)),
                this.machine = Number('0x' + arguments[0].substr(8, 6)),
                this.pid = Number('0x' + arguments[0].substr(14, 4)),
                this.increment = Number('0x' + arguments[0].substr(18, 6))
            }
            else if (arguments.length == 4 && arguments[0] != null) {
                this.timestamp = arguments[0];
                this.machine = arguments[1];
                this.pid = arguments[2];
                this.increment = arguments[3];
            }
            else {
                this.timestamp = Math.floor(new Date().valueOf() / 1000);
                this.machine = machine;
                this.pid = pid;
                if (increment > 0xffffff) {
                    increment = 0;
                }
                this.increment = increment++;

            }
        };
    })();

    ObjectId.prototype.getDate = function () {
        return new Date(this.timestamp * 1000);
    }

    /**
    * Turns a WCF representation of a BSON ObjectId into a 24 character string representation.
    */
    ObjectId.prototype.toString = function () {
        var timestamp = this.timestamp.toString(16);
        var machine = this.machine.toString(16);
        var pid = this.pid.toString(16);
        var increment = this.increment.toString(16);
        return '00000000'.substr(0, 6 - timestamp.length) + timestamp +
               '000000'.substr(0, 6 - machine.length) + machine +
               '0000'.substr(0, 4 - pid.length) + pid +
               '000000'.substr(0, 6 - increment.length) + increment;
    }
    
    breeze.config.registerAdapter("dataService", ctor);

}));