/* 
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
function imgCSS(ed) {
    var code = ed.getCss(), imags;
    local = document.location.host.replace(/[-\/\\^$*+?.()|[\]{}]/g,'\\$&');
    regex = new RegExp('(http:|https:){0,1}\/\/'+local,'g');
    code = code.replace(regex,''); //limpiar url locales
    code = code.replace(/(http:|https:){0,1}\/\//g,'#'); //marcar url no locales
    imags = code.match(/\("{0,1}[^#^\(]+?\.(gif|jpg|png|jpeg|tif|tiff|webp|svg|ico)"{0,1}\)/gi);
    if (imags !== null){
        imags =imags.map(function(x){ return x.replace(/\("{0,1}(.*){0,1}"\)/,'$1');});
    }
    else 
        imags =[];	
    return imags;
 }
/*
get image src from HTML file
just local urls
*/
function imgHTML(){
    var imags = [];
    var src;
    var code = document.querySelector('.gjs-frame').contentDocument;
    code = code.getElementsByTagName('img');
    for (i = 0; i < code.length; i++){
        src = code[i].src;
        src = src.replace(location.origin,'');
        if (!src.includes('http')){
            imags.push(src);
        }
    };
    imags.push('img/pleca.webp'); //obtiene imagen de la pleca cartel/ en pruebas
    return imags;	
}

/**
Convierte a binario los datos devueltos en la lectura
**/
function arrayBufferToBinary(buffer) {
    var binary = '';
    var bytes = [].slice.call(new Uint8Array(buffer));
    bytes.forEach((b) => binary += String.fromCharCode(b));
    return binary;
};

/*
Leer los archivos de imagen
param: ed  el editor
*/
async function readImgs(ed){
    var ImgData;
    var listaImgs, imagsSet;
    var peticion, archivo;
    var content=[];
    listaImgs = imgHTML(ed).concat(imgCSS(ed));
    imagsSet = new Set(listaImgs);
    listaImgs = [...imagsSet];
    for (var i = 0; i<listaImgs.length; i++){
        try{
            peticion = await fetch(listaImgs[i]);
            imgData =  await peticion.arrayBuffer();
            archivo = peticion.url.match(/[^\/\.]*\.[^\.]*$/, '$&')[0];
            content[archivo] = arrayBufferToBinary(imgData);;		
        }
        catch(e){
            console.log("error "+e.message);
        }
    };
    return content;
}