/*
OpenLinkMap Copyright (C) 2010 Alexander Matheisen
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it under certain conditions.
See olm.openstreetmap.de/info for details.
*/

/*
* based on OpenLayers.Format.Text
* @requires OpenLayers/Feature/Vector.js
* @requires OpenLayers/Geometry/Point.js
* 
* Class: OpenLayers.Format.OSMPOI
* Read OSMPOI text format. Create a new instance with the <OpenLayers.Format.OSMPOI>
*     constructor. This reads text which is formatted like CSV text, using
*     spaces as the seperator by default.
*
* Inherits from:
*  - <OpenLayers.Format>
*/

OpenLayers.Format.OSMPOI = OpenLayers.Class(OpenLayers.Format,
{
	/*
	* APIProperty: defaultStyle
	* defaultStyle allows one to control the default styling of the features.
	*    It should be a symbolizer hash. By default, this is set to match the
	*    Layer.Text behavior, which is to use the default OpenLayers Icon.
	*/
	defaultStyle: null,
	/*
	* Constructor: OpenLayers.Format.OSMPOI
	* Create a new parser for OSMPOI text.
	*
	* Parameters:
	* options - {Object} An optional object whose properties will be set on
	*     this instance.
	*/
	initialize: function(options)
    {
		options = options || {};
		if(!options.defaultStyle)
		{
			options.defaultStyle =
			{
				'externalGraphic': OpenLayers.Util.getImagesLocation() + "marker.png",
				'graphicWidth': 21,
				'graphicHeight': 25,
				'graphicXOffset': -10.5,
				'graphicYOffset': -12.5
			};
		}
		OpenLayers.Format.prototype.initialize.apply(this, [options]);
	}, 

	/*
	* APIMethod: read
	* Return a list of features from a Space Seperated Values text string.
	* 
	* Parameters:
	* data - {String} 
	*
	* Returns:
	* An Array of <OpenLayers.Feature.Vector>s
	*/
	read: function(text)
	{
		wgs84 = new OpenLayers.Projection("EPSG:4326");
		mercartor = new OpenLayers.Projection("EPSG:900913");
		var lines = text.split("<br/>");
		var features = [];
		// length - 1 to allow for trailing new line
			for (var lcv = 0; lcv < (lines.length - 1); lcv++)
			{
				var currLine = lines[lcv].replace(/^\s*/,'').replace(/\s*$/,'');
				if (currLine.charAt(0) != '#')
				{
					/* not a comment */
					var vals = currLine.split(' ');
					var geometry = new OpenLayers.Geometry.Point(0,0);
					var attributes = {};
					var style = this.defaultStyle ? OpenLayers.Util.applyDefaults({}, this.defaultStyle) : null;
					var icon, iconSize, iconOffset, overflow;
					if (vals[0] && vals[1] && vals[2])
					{
						geometry.x = parseFloat(vals[0]);
						geometry.y = parseFloat(vals[1]);
						attributes['id'] = vals[2];
						geometry.transform(mercartor, wgs84); 
					var feature = new OpenLayers.Feature.Vector(geometry, attributes, style);
					features.push(feature);
					}
				}
			}
		return features;
	},   
	CLASS_NAME: "OpenLayers.Format.OSMPOI" 
});