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// model that works with Yahoo Search API
dojo.declare("dojox.grid.data.yahooSearch", dojox.grid.data.dynamic, 
        function(inFields, inData) {
                this.rowsPerPage = 20;
                this.fieldNames = [];
                for (var i=0, f; (f=inFields[i]); i++)
                        this.fieldNames.push(f.name);
        }, {
        clearData: function() {
                turbo.widgets.TurboGrid.data.dynamic.prototype.clearData.apply(this, arguments);
        },
        // server send / receive
        encodeParam: function(inName, inValue) {
                return turbo.printf('&%s=%s', inName, inValue);
        },
        getParams: function(inParams) {
                var url = this.url;
                url += '?appid=turboajax';
                inParams = inParams || {};
                inParams.output = 'json';
                inParams.results = this.rowsPerPage;
                inParams.query = turbo.$('searchInput').value.replace(/ /g, '+');
                for (var i in inParams)
                        if (inParams[i] != undefined)
                                url += this.encodeParam(i, inParams[i]);
                return url;
        },
        send: function(inAsync, inParams, inOnReceive, inOnError) {
                var p = this.getParams(inParams);
                dojo.io.bind({
                        url: "support/proxy.php",
                        method: "post",
                        content: {url: p },
                        contentType: "application/x-www-form-urlencoded; charset=utf-8",
                        mimetype: 'text/json',
                        sync: !inAsync,
                        load: turbo.bindArgs(this, "receive", inOnReceive, inOnError),
                        error: turbo.bindArgs(this, "error", inOnError) 
                });
                this.onSend(inParams);
        },
        receive: function(inOnReceive, inOnError, inEvt, inData) {
                try {
                        inData = inData.ResultSet;
                        inOnReceive(inData);
                        this.onReceive(inData);                                 
                } catch(e) {
                        if (inOnError)
                                inOnError(inData);
                }
        },
        error: function(inOnError, inTyp, inErr) {
                var m = 'io error: ' + inErr.message;
                alert(m);
                if (inOnError)
                        inOnError(m);
        },
        fetchRowCount: function(inCallback) {
                this.send(true, inCallback );
        },
        // request data 
        requestRows: function(inRowIndex, inCount)      {
                inRowIndex = (inRowIndex == undefined ? 0 : inRowIndex);
                var params = { 
                        start: inRowIndex + 1
                }
                this.send(true, params, turbo.bindArgs(this, this.processRows));
        },
        // server callbacks
        processRows: function(inData) {
                for (var i=0, l=inData.totalResultsReturned, s=inData.firstResultPosition; i<l; i++) {
                        this.setRow(inData.Result[i], s - 1 + i);
                }
                // yahoo says 1000 is max results to return
                var c = Math.min(1000, inData.totalResultsAvailable);
                if (this.count != c) {
                        this.setRowCount(c);
                        this.allChange();
                        this.onInitializeData(inData);
                }
        },
        getDatum: function(inRowIndex, inColIndex) {
                var row = this.getRow(inRowIndex);
                var field = this.fields.get(inColIndex);
                return (inColIndex == undefined ? row : (row ? row[field.name] : field.na));
        },
        // events
        onInitializeData: turbo.nop,
        onSend: turbo.nop,
        onReceive: turbo.nop
});

// report
modelChange = function() {
        var n = turbo.$('rowCount');
        if (n)
                n.innerHTML = turbo.printf('about %s row(s)', model.count);
}


// some data formatters
formatLink = function(inData, inRowIndex) {
        if (!inData[0] || !inData[1])
                return '&nbsp;';
        return turbo.supplant('<a target="_blank" href="{href}">{text}</a>', {href: inData[0], text: inData[1] });
};

formatImage = function(inData, inRowIndex) {
        if (!inData[0] || !inData[1])
                return '&nbsp;';
        var o = {
                href: inData[0], 
                src: inData[1].Url,
                width: inData[1].Width,
                height: inData[1].Height
        }       
        return turbo.supplant('<a href="{href}" target="_blank"><img border=0 src="{src}" width="{width}" height="{height}"></a>', o);
};

formatDate = function(inDatum, inRowIndex) {
        if (inDatum == '')
                return '&nbsp;';
        var d = new Date(inDatum * 1000);
        return turbo.printf('%s/%s/%s', d.getMonth(), d.getDate(), d.getFullYear());
};

formatDimensions = function(inData, inRowIndex) {
        if (!inData[0] || !inData[1])
                return '&nbsp;';
        return inData[0] + ' x ' + inData[1];
}