source: trunk/web/addons/job_monarch/lib/extjs-30/examples/tasks/db/ext-db.js @ 625

/*!
 * Ext JS Library 3.0.0
 * Copyright(c) 2006-2009 Ext JS, LLC
 * licensing@extjs.com
 * http://www.extjs.com/license
 */

// Asbtract base class for SqlDB classes
Ext.data.SqlDB = function(config){
        Ext.apply(this, config);
        Ext.data.SqlDB.superclass.constructor.call(this);

        this.addEvents({
                open : true,
                close: true
        });
};

Ext.extend(Ext.data.SqlDB, Ext.util.Observable, {
        maxResults: 10000,
        openState : false,

    // abstract methods
    open : function(file, cb, scope){
        },

        close : function(){
        },

    exec : function(sql, cb, scope){
        },

        execBy : function(sql, args, cb, scope){
        },

        query : function(sql, cb, scope){
        },

        queryBy : function(sql, args, cb, scope){
        },

    // protected/inherited method
    isOpen : function(){
                return this.openState;
        },

        getTable : function(name, keyName){
                return new Ext.data.SqlDB.Table(this, name, keyName);
        },

        createTable : function(o){
                var tableName = o.name;
                var keyName = o.key;
                var fs = o.fields;
                var cb = o.callback;
                var scope = o.scope;
                if(!(fs instanceof Array)){ // Ext fields collection
                        fs = fs.items;
                }
                var buf = [];
                for(var i = 0, len = fs.length; i < len; i++){
                        var f = fs[i], s = f.name;
                        switch(f.type){
                    case "int":
                    case "bool":
                    case "boolean":
                        s += ' INTEGER';
                        break;
                    case "float":
                        s += ' REAL';
                        break;
                    default:
                        s += ' TEXT';
                }
                if(f.allowNull === false || f.name == keyName){
                        s += ' NOT NULL';
                }
                if(f.name == keyName){
                        s += ' PRIMARY KEY';
                }
                if(f.unique === true){
                        s += ' UNIQUE';
                }

                buf[buf.length] = s;
            }
            var sql = ['CREATE TABLE IF NOT EXISTS ', tableName, ' (', buf.join(','), ')'].join('');
        this.exec(sql, cb, scope);
        }
});


Ext.data.SqlDB.getInstance = function(db, config){
    if(window.htmlControl){ // air
        return new Ext.data.AirDB(config);
    } else { // gears
        return new Ext.data.GearsDB(config);
    }
};


Ext.data.SqlDB.Table = function(conn, name, keyName){
        this.conn = conn;
        this.name = name;
        this.keyName = keyName;
};

Ext.data.SqlDB.Table.prototype = {
        update : function(o, cb, scope){
                var clause = this.keyName + " = :" + this.keyName;
                this.updateBy(o, clause, {}, cb, scope);
        },

        updateBy : function(o, clause, args, cb, scope){
                var sql = "UPDATE " + this.name + " set ";
                var fs = [], a = [];
                for(var key in o){
                        if(o.hasOwnProperty(key)){
                                fs[fs.length] = key + ' = ?';
                                a[a.length] = o[key];
                        }
                }
                for(var key in args){
                        if(args.hasOwnProperty(key)){
                                a[a.length] = args[key];
                        }
                }
                sql = [sql, fs.join(','), ' WHERE ', clause].join('');
                this.conn.execBy(sql, a, cb, scope);
        },

        insert : function(o, cb, scope){
                var sql = "INSERT into " + this.name + " ";
                var fs = [], vs = [], a = [];
                for(var key in o){
                        if(o.hasOwnProperty(key)){
                                fs[fs.length] = key;
                                vs[vs.length] = '?';
                                a[a.length] = o[key];
                        }
                }
                sql = [sql, '(', fs.join(','), ') VALUES (', vs.join(','), ')'].join('');
        this.conn.execBy(sql, a, cb, scope);
    },

        select : function(clause, cb, scope){
                this.selectBy(clause, null, cb, scope);
        },

        selectBy : function(clause, args, cb, scope){
                var sql = "select * from " + this.name;
                if(clause){
                        sql += ' ' + clause;
                }
                args = args || {};
                this.conn.queryBy(sql, args, cb, scope);
        },

        remove : function(clause, cb, scope){
                this.deleteBy(clause, null, cb, scope);
        },

        removeBy : function(clause, args, cb, scope){
                var sql = "delete from " + this.name;
                if(clause){
                        sql += ' where ' + clause;
                }
                args = args || {};
                this.conn.execBy(sql, args, cb, scope);
        }
};

Ext.data.SqlDB.Proxy = function(conn, table, keyName, store){
    Ext.data.SqlDB.Proxy.superclass.constructor.call(this);
    this.conn = conn;
    this.table = this.conn.getTable(table, keyName);
    this.store = store;

    this.store.on('add', this.onAdd, this);
    this.store.on('update', this.onUpdate, this);
    this.store.on('remove', this.onRemove, this);
};

Ext.extend(Ext.data.SqlDB.Proxy, Ext.data.DataProxy, {
    load : function(params, reader, callback, scope, arg){
        if(!this.conn.isOpen()){ // assume that the connection is in the process of opening
                this.conn.on('open', function(){
                        this.load(params, reader, callback, scope, arg);
                }, this, {single:true});
                return;
        };
        if(this.fireEvent("beforeload", this, params, reader, callback, scope, arg) !== false){
                        var clause = params.where || '';
                        var args = params.args || [];
                        var group = params.groupBy;
                        var sort = params.sort;
                        var dir = params.dir;

                        if(group || sort){
                                clause += ' ORDER BY ';
                                if(group && group != sort){
                                        clause += group + ' ASC, ';
                                }
                                clause += sort + ' ' + (dir || 'ASC');
                        }

                        this.table.selectBy(clause, args,
                                        this.onLoad.createDelegate(this, [{callback:callback, scope:scope, arg:arg, reader: reader}], 0));
        }else{
            callback.call(scope||this, null, arg, false);
        }
    },

    onLoad : function(trans, rs, e, stmt){
        if(rs === false){
                this.fireEvent("loadexception", this, null, trans.arg, e);
            trans.callback.call(trans.scope||window, null, trans.arg, false);
            return;
        }
        var result = trans.reader.readRecords(rs);
        this.fireEvent("load", this, rs, trans.arg);
        trans.callback.call(trans.scope||window, result, trans.arg, true);
    },

    processData : function(o){
        var fs = this.store.fields;
        var r = {};
        for(var key in o){
                var f = fs.key(key), v = o[key];
                        if(f){
                                if(f.type == 'date'){
                                        r[key] = v ? v.format('Y-m-d H:i:s') : '';
                                }else if(f.type == 'boolean'){
                                        r[key] = v ? 1 : 0;
                                }else{
                                        r[key] = v;
                                }
                        }
                }
                return r;
    },

    onUpdate : function(ds, record){
        var changes = record.getChanges();
        var kn = this.table.keyName;
        this.table.updateBy(this.processData(changes), kn + ' = ?', [record.data[kn]]);
        record.commit(true);
    },

    onAdd : function(ds, records, index){
        for(var i = 0, len = records.length; i < len; i++){
                this.table.insert(this.processData(records[i].data));
        }
    },

    onRemove : function(ds, record, index){
        var kn = this.table.keyName;
        this.table.removeBy(kn + ' = ?', [record.data[kn]]);
    }
});