// ==UserScript==
// @name        Stig's Art Grabr
// @namespace   dk.rockland.userscript.misc.artgrab
// @description Grabbing big high resolution album cover-art from various sites
// @version     2016.06.20.0
// @include     /45cat\./
// @include     /allmusic\./
// @include     /amazon\./
// @include     /bandcamp\./
// @include     /cdbaby\./
// @include     /itunes\.apple\./
// @include     /jamendo\./
// @include     /last(fm)?\.[a-z]{2,3}/
// @include     /magnatune\./
// @include     /fnd\.io/
// @include     /labs\.stephenou\.com\/itunes/
// @include     /soundcloud\./
// @include     /play\.google\.com/
// @author      Stig Nygaard, http://www.rockland.dk
// @homepageURL http://www.rockland.dk/userscript/misc/artgrab/
// @supportURL  http://www.rockland.dk/userscript/misc/artgrab/
// @grant       GM_registerMenuCommand
// @noframes
// @downloadURL none
// ==/UserScript==

// Partly based on tips at http://wiki.musicbrainz.org/User:Nikki/CAA

// CHANGELOG - The most important updates/versions:
var changelog = [
    {version: '2016.06.20.0', description: '1st official release version.'},
    {version: '2016.06.19.1', description: 'Updated/fixed support for last.fm and bandcamp. Musicdinner is gone, but support for fnd.io and labs.stephenou.com/itunes added instead.'},
    {version: '2016.06.19.0', description: 'First userscript version (Converted from my old BCA bookmarklet).'}
];

function runGrabr() {
    var DEBUG = true;
    var log = function(s) {
        if (DEBUG && window.console) {
            window.console.log(s);
        }
    };
    // [ page pattern, search for img patterns, replace this, with this ]
    var a = [[/45cat\./, /-s\.jpg/i, /-s\.jpg/gi, ".jpg"],
        [/45cat\./, /-s\.png/i, /-s\.png/gi, ".png"],
        [/allmusic\./, /\/JPG_\d{3}\//i, /\/JPG_\d{3}\//gi, "/JPG_1080/"],
        [/amazon\./, /\._[A-Z]{2}\d{3}_[\w_,-]*\.jpg/i, /\._[A-Z]{2}\d{3}_[\w_,-]*\.jpg/gi, ".jpg"],
        [/amazon\./, /\._[A-Z]{2}\d{3}_[\w_,-]*\.png/i, /\._[A-Z]{2}\d{3}_[\w_,-]*\.png/gi, ".png"],
        [/bandcamp\./, /_\d{1,2}\.jpg/i, /_\d{1,2}\.jpg/gi, "_0.jpg"],
        [/bandcamp\./, /_\d{1,2}\.png/i, /_\d{1,2}\.png/gi, "_0.png"],
        [/cdbaby\./, /images\..*_small\.[jpgn]{3}/i, /_small\./gi, "."],
        [/cdbaby\./, /images\..*\.jpg/i, /\.jpg/gi, "_large.jpg"],
        [/cdbaby\./, /images\..*\.png/i, /\.png/gi, "_large.png"],
        [/itunes\.apple\./, /1\d0x1\d0\./i, /1\d0x1\d0\./gi, "1200x1200."],
        [/jamendo\./, /1\.\d00\.jpg/i, /1\.\d00\.jpg/gi, "1.0.jpg"],
        [/jamendo\./, /1\.\d00\.png/i, /1\.\d00\.png/gi, "1.0.png"],
        [/last(fm)?\.[a-z]{2,3}/, /\.lst\.fm\/i\/u\/[a-zA-Z]*\d{2,}\w*\//i, /\.lst\.fm\/i\/u\/[a-z]*\d{2,}\w*\//gi, ".lst.fm/i/u/"],
        [/magnatune\./, /cover_\d{2,3}\./i, /cover_\d{2,3}\./gi, "cover."],
        [/musicbrainz\.org/, /_thumb\d{3}\./i, /_thumb\d{3}\./gi, "."],
        [/musicbrainz\.org/, /-\d{3}\.jpg/i, /-\d{3}\.jpg/gi, ".jpg"],
        [/musicbrainz\.org/, /-\d{3}\.png/i, /-\d{3}\.png/gi, ".png"],
        [/fnd\.io/, /\/\d{2,}x\d{2,}bb/i, /\/\d{2,}x\d{2,}bb/gi, "/1200x1200bb"],
        [/labs\.stephenou\.com/, /\/\d{2,3}x\d{2,3}bb/i, /\/\d{2,3}x\d{2,3}bb/gi, "/1200x1200bb"],
        /* https://affiliate.itunes.apple.com/resources/documentation/itunes-store-web-service-search-api/ */
        [/soundcloud\./, /t\d\d0x\d\d0\./i, /t\d\d0x\d\d0\./gi, "original."],
        [/play\.google\.com/, /googleusercontent\.com.*\=w\d{3}/, /\=w\d{3}$/, "=w1200"]];
    var aEv = function (e,ev,f,c) {
        c=(c)?c:false;
        if(e.addEventListener) {
            e.addEventListener(ev,f,c)
        } else if(e.attachEvent) {
            e.attachEvent("on"+ev,f)
        } else {
            e["on"+ev]=f
        }
    };
    var w = null, n = 0, m = 20, d = document;
    if (d.location.hostname.search(/soundcloud\./) > -1) {
        spans = document.querySelectorAll("span[style*=background-image]");
        for (i = 0; i < spans.length; i++) {
            if (spans[i].style.backgroundImage) {
                imgsrc = spans[i].style.backgroundImage.match(/url[\(\"\u0027]+([^\"\u0027\)]*)[\)\"\u0027]+/)[1];
                if ((spans[i].getElementsByTagName("img").length == 0) && (imgsrc.match(/t[\d]{3}x[\d]{3}\./) != null)) {
                    spans[i].innerHTML = "<img src=\u0027" + imgsrc + "\u0027 alt=\u0027\u0027 style=\u0027width:200px;height:200px;border:none\u0027 />";
                }
            }
        }
    }
    log('Activated while on ' + d.location.hostname);
    o:
    for (var v = 0; v < a.length; v++) {
        if (d.location.hostname.search(a[v][0]) > -1) {
            log('Running on ' + d.location.hostname);
            w = a[v];
            var l = d.getElementsByTagName("img");
            if (l) {
                log('Found ' + l.length + ' image tags');
                for (var i = 0; i < l.length; i++) {
                    if ((l[i].src).search(w[1]) > -1) {
                        l[i].style.border = "1px #FB0 solid";
                        if (l[i].naturalWidth) {
                            l[i].onmouseover = function () {
                                this.title = "" + this.naturalWidth + "x" + this.naturalHeight
                            };
                        }
                        aEv(l[i], "load", function () {
                            if (this.style) {
                                this.style.borderColor = "#F00";
                                if (this.naturalWidth && this.naturalWidth > 999) {
                                    this.style.borderWidth = "2px"
                                }
                            }
                        });
                        aEv(l[i], "click", function () {
                            if (this.src) {
                                location = this.src
                            }
                        });
                        l[i].src = l[i].src.replace(w[2], w[3]);
                        n++;
                        if (n == m) {
                            if (confirm("" + n + " images requested. Continue?")) {
                                m = m + 20;
                            } else {
                                break o;
                            }
                        }
                    }
                }
            }
        }
    }
    if (w == null) {
        log('No hits found...');
    }
    return void(0);
}

//window.runGrabr = runGrabr; // (requires @grant none - but could open for bookmarklet version)
if (GM_registerMenuCommand) {
    GM_registerMenuCommand("Search big size cover art", runGrabr, "a");
}