161 lines
3.3 KiB
JavaScript
161 lines
3.3 KiB
JavaScript
var netgis = netgis || {};
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/**
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* General purpose pure static utility functions.
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*/
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netgis.util =
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(
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function ()
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{
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"use strict";
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// Methods
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var isDefined = function( v )
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{
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return ( typeof v !== "undefined" );
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};
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var isString = function( v )
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{
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return ( typeof v === "string" || v instanceof String );
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};
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/**
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* Replace all string occurences.
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* @param {String} str
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* @param {String} find
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* @param {String} newstr
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* @returns {String}
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*/
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var replace = function( str, find, newstr )
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{
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return str.replace( new RegExp( find, "g" ), newstr );
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};
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var foreach = function( obj, fn )
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{
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for ( var k in obj )
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{
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if ( obj.hasOwnProperty( k ) )
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{
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fn( k, obj[ k ] );
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}
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}
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};
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/**
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* Replace template strings in html string.
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* @param {type} html String with "{key}" placeholders.
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* @param {type} data Object of key value pairs to insert.
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* @returns {String} The modified html string.
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*/
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var template = function( html, data )
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{
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// Get Template: $( "#template-" + name ).text();
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foreach
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(
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data,
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function( key, value )
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{
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html = html.replace( new RegExp( "{" + key + "}", "g" ), value );
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}
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);
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return html;
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};
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/**
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* Create HTML element from string.
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* @param {String} html
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* @returns {Element}
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*/
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var create = function( html )
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{
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var temp = document.createElement( "tbody" );
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temp.innerHTML = html;
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return temp.children[ 0 ];
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};
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/**
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* Replace new line characters with HTML line breaks.
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* @param {String} str
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* @returns {String}
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*/
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var newlines = function( str )
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{
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return str.replace( new RegExp( "\n", "g" ), "<br />" );
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};
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/**
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* Calculate the byte size of an object.
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* @param {Object} json
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* @returns {Object} Object with size info ( bytes, kilobytes, megabytes )
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*/
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var size = function( json )
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{
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var bytes = new TextEncoder().encode( JSON.stringify( json ) ).length;
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var kilobytes = bytes / 1024;
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var megabytes = kilobytes / 1024;
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return { bytes: bytes, kilobytes: kilobytes, megabytes: megabytes };
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};
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/**
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* Send async GET request.
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* @param {String} url
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* @param {function} callback
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*/
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var request = function( url, callback )
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{
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var request = new XMLHttpRequest();
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request.onload = function() { callback( this.responseText ); };
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request.open( "GET", url, true );
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request.send();
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};
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/**
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* Pad string with leading zeros.
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* @param {String} s The string to pad.
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* @param {Integer} n Minimum number of digits.
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* @returns {String} The padded string.
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*/
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var padstr = function( s, n )
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{
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var o = s.toString();
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while ( o.length < n ) o = "0" + o;
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return o;
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};
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/**
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* Merge object properties.
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* @param {Object} target Merged object properties will be written to this.
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* @param {Object} other The object to append to the target object.
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* @returns {Object} The modified target object.
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*/
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var merge = function( target, other )
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{
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return Object.assign( target, other );
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};
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// Public Interface
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var iface =
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{
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isDefined: isDefined,
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isString: isString,
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replace: replace,
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foreach: foreach,
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template: template,
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newlines: newlines,
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create: create,
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size: size,
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request: request,
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padstr: padstr,
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merge: merge
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};
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return iface;
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}
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)(); |