leaflet.geocsv.js

/*
* Copyright 2013 - GPL
* Iván Eixarch <ivan@sinanimodelucro.org>
* https://github.com/joker-x/Leaflet.geoCSV
*/
L.GeoCSV=L.GeoJSON.extend({options:{titles:['lat','lng','popup'],latitudeTitle:'lat',longitudeTitle:'lng',fieldSeparator:';',lineSeparator:'\n',deleteDoubleQuotes:true,firstLineTitles:false},_propertiesNames:[],initialize:function(csv,options){L.Util.setOptions(this,options);L.GeoJSON.prototype.initialize.call(this,csv,options)},addData:function(data){if(typeof data==='string'){var titulos=this.options.titles;if(this.options.firstLineTitles){data=data.split(this.options.lineSeparator);if(data.length<2)return;titulos=data[0];data.splice(0,1);data=data.join(this.options.lineSeparator);titulos=titulos.trim().split(this.options.fieldSeparator);for(var i=0;i<titulos.length;i++){titulos[i]=this._deleteDoubleQuotes(titulos[i])}this.options.titles=titulos}for(var i=0;i<titulos.length;i++){var prop=titulos[i].toLowerCase().replace(/[^\w ]+/g,'').replace(/ +/g,'_');if(prop==''||prop=='_'||this._propertiesNames.indexOf(prop)>=0)prop='prop-'+i;this._propertiesNames[i]=prop}data=this._csv2json(data)}L.GeoJSON.prototype.addData.call(this,data)},getPropertyName:function(title){var pos=this.options.titles.indexOf(title),prop='';if(pos>=0)prop=this._propertiesNames[pos];return prop},getPropertyTitle:function(prop){var pos=this._propertiesNames.indexOf(prop),title='';if(pos>=0)title=this.options.titles[pos];return title},_deleteDoubleQuotes:function(cadena){if(this.options.deleteDoubleQuotes)cadena=cadena.trim().replace(/^"/,"").replace(/"$/,"");return cadena},_csv2json:function(csv){var json={};json["type"]="FeatureCollection";json["features"]=[];var titulos=this.options.titles;csv=csv.split(this.options.lineSeparator);for(var num_linea=0;num_linea<csv.length;num_linea++){var campos=csv[num_linea].trim().split(this.options.fieldSeparator),lng=parseFloat(campos[titulos.indexOf(this.options.longitudeTitle)]),lat=parseFloat(campos[titulos.indexOf(this.options.latitudeTitle)]);if(campos.length==titulos.length&&lng<180&&lng>-180&&lat<90&&lat>-90){var feature={};feature["type"]="Feature";feature["geometry"]={};feature["properties"]={};feature["geometry"]["type"]="Point";feature["geometry"]["coordinates"]=[lng,lat];for(var i=0;i<titulos.length;i++){if(titulos[i]!=this.options.latitudeTitle&&titulos[i]!=this.options.longitudeTitle){feature["properties"][this._propertiesNames[i]]=this._deleteDoubleQuotes(campos[i])}}json["features"].push(feature)}}return json}});L.geoCsv=function(csv_string,options){return new L.GeoCSV(csv_string,options)};