140 lines
3.5 KiB
PHP
140 lines
3.5 KiB
PHP
<?php
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/*
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JavaScript loader. Load a sequence of JavaScript files using individual
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SCRIPT elements, or concatenated, with or without a wrapper function (to keep
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variables out of the global scope) and with or without a SCRIPT element wrapper
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(with for an internal script, without for external).
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Copyright © 2012 Jesse McCarthy <http://jessemccarthy.net/>
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This software may be used under the MIT (aka X11) license or
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Simplified BSD (aka FreeBSD) license. See LICENSE.
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*/
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/**
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* JavaScript loader.
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*
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* @version 0.5.0
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*/
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class JSLoader {
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protected $cfg = array();
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protected $scripts = array();
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protected $output;
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public function __construct($cfg = array()) {
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$this->cfg = array_merge($this->get_default_cfg() , $cfg);
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}
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protected function get_default_cfg(){
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$default_cfg = array(
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'file_system_path' => "./",
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'concat' => false,
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'function_wrapper' => false,
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'indent_string' => " ",
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// False for an external script or for concatenating output from multiple
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// instances.
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'script_wrapper' => true,
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'with_header' => true
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);
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return $default_cfg;
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}
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public function parse_scripts($scripts) {
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$scripts = explode("\n", $scripts);
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foreach($scripts as $script_i => & $script) {
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if (!strlen($script = trim($script)) || $script[0] === "#") {
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unset($scripts[$script_i]);
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}
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}
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return $scripts;
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}
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public function set_scripts($scripts, $cfg = array()) {
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$default_cfg = array(
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'add' => false
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);
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$cfg = array_merge($default_cfg, $cfg);
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if (!is_array($scripts)) {
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$scripts = $this->parse_scripts($scripts);
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}
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if (!$cfg['add']) {
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$this->scripts = array();
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}
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$this->scripts = array_merge($this->scripts, $scripts);
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}
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public function add_scripts($scripts)
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{
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$this->set_scripts($scripts, array(
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'add' => true
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));
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}
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public function get_output() {
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$scripts = $this->scripts ? $this->scripts : array();
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if ($this->cfg['concat']) {
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foreach($scripts as & $script) {
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$file = $script;
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$file = rtrim($this->cfg['file_system_path'], "/") . "/{$file}";
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$script = file_get_contents($file);
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}
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$scripts = join("\n\n", $scripts);
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if ($this->cfg['function_wrapper']) {
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$scripts = explode("\n", $scripts);
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foreach($scripts as & $line) {
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if ($line !== "") {
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$line = "{$this->cfg['indent_string']}{$line}";
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}
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}
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$scripts = join("\n", $scripts);
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$scripts = <<<DOCHERE
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( function () {
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{$scripts}
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} )();
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DOCHERE;
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}
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// if
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if ($this->cfg['script_wrapper']) {
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$scripts = <<<DOCHERE
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<script>
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{$scripts}
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</script>
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DOCHERE;
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} elseif ($this->cfg['with_header']) {
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header("Content-Type: text/javascript");
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}
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$scripts = array(
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$scripts
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);
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}
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else {
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foreach($scripts as & $script) {
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$script = <<<DOCHERE
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<script src="{$script}"></script>
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DOCHERE;
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}
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}
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$this->output = join("\n\n\n", $scripts);
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return $this->output;
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}
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}
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