Asset Manager

[b] So I was checking out some of the assets extensions people have made and though they were useful and served their purpose, I had some additions I wanted to make and so I went off to make my own asset system. Here is the scoop: [/b]

[b] So I wanted to be able to use the CodeIgnitor system in my javascript and css files and I wanted a simple way to incorporate this as well as load images, js, css, swf, flv, etc... So my system is as follows. [/b]

[b] The files used are: [/b]

[b] application>config>assets.php application>controllers>asset_controller.php application>libraries>Assets.php [/b]

[h3] And then just add in a simple route in our application>config>routes.php file. [/h3]

[code] $route["asset/:any"] = "asset_controller/index"; [/code]

[h3] application>config>assets.php [/h3]

[code] <?php $config["assets_folder"] = "assets"; $config["assets_path"] = $_SERVER["DOCUMENT_ROOT"]."/".$config["assets_folder"]; $config["default_level"] = "public";

// set asset types and folders $config["asset_types"] = array( "flv" => "flash", "swf" => "flash", "jpg" => "images", "png" => "images", "gif" => "images", "js" => "js", "css" => "css" ); ?> [/code]

[h3] application>controllers>asset_controller.php [/h3]

[code] <?php

class Asset_controller extends Controller {

function Asset_controller()
{
    parent::Controller();
}

function load_files(){
    $this->load->config("assets");
    $asset_folder = $this->config->item("assets_path");
    $type = $this->uri->segment(2);
    $level = $this->uri->segment(3);
    $files_path = "$asset_folder/$level/$type/";
    $ext = ".$type";
    $file = $this->uri->segment(4);
    if($type == 'js'){
        Header("Content-type: text/javascript");
    }elseif($type == 'css'){
        Header ("Content-type: text/css");
    }
    require_once($files_path.$file.$ext);
}

} ?> [/code]

[h3] application>libraries>Assets.php [/h3]

[code] <?php if (!defined('BASEPATH')) exit('No direct script access allowed');

class Assets {

var $javascript = array();
var $css = array();

function Assets($config=array()){
    // Get CI instance
    $this->ci =& get_instance();
    if(!empty($config)){
        foreach($config as $k => $v){
            $this->$k = $v;
        }
    }else{
        show_error("Assets Config File is Missing or is Empty");
    }
}

function load($file,$level="",$params=array()){
    if(!$level){
        $level = $this->default_level;
    }
    $type = strtolower(substr(strrchr($file, '.'), 1));
    if($type=="jpg" || $type=="png" || $type=="gif"){
        // Generate Image Link
        $image_link = site_url("$this->assets_folder/$level/images").$file;
        // Generate the Paramaters
        $image_params = $this->generate_params($params);
        // Create Image Tag
        $output = "<img src='$image_link'$image_params />";
        return $output;
    }elseif($type=="js"){
        if(array_key_exists("extra",$params) && $params["extra"] != ""){
            $this->javascript[] = "$type/$level/$file/{$params["extra"]}";
        }else{
            $this->javascript[] = "$type/$level/$file";
        }
    }elseif($type=="css"){
        $this->css[] = "$type/$level/$file";
    }else{
        return false;
    }
}

function url($file,$level=""){
    if(!$level){
        $level = $this->default_level;
    }
    $type = strtolower(substr(strrchr($file, '.'), 1));
    if(array_key_exists($type,$this->asset_types)){
        foreach($this->asset_types as $asset_type => $folder){
            if($type == $asset_type){
                $output = site_url("$this->assets_folder/$level/$folder").$file;
                return $output;
                break;
            }
        }
    }else{
        show_error("$type is not a valid asset type");
    }
}
    
function generate_params($params){
    $output = '';
    if(!empty($params)){
        foreach($params as $k => $v){
            $output .= ' '.$k.'="'.$v.'"';
        }
    }
    return $output;
}

function display_header_assets(){
    $output = '';
    foreach($this->javascript as $file){
        $output .= "\n";
    }
    foreach($this->css as $file){
        $output .= "&lt;link type='text/css' rel='stylesheet' href='".site_url("asset").str_replace(".css","",$file)."/' /&gt;\n";
    }
    return $output;
}

}

?> [/code]