ematrix/js/main-blocked.js

/*******************************************************************************

    ηMatrix - a browser extension to black/white list requests.
    Copyright (C) 2015-2019 Raymond Hill
    Copyright (C) 2019 Alessio Vanni

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see {http://www.gnu.org/licenses/}.

    Home: https://libregit.org/heckyel/ematrix
    uMatrix Home: https://github.com/gorhill/uBlock
*/

/* global uDom */

'use strict';

/******************************************************************************/

(function() {

    /******************************************************************************/

    var details = {};

    (function() {
        var matches = /details=([^&]+)/.exec(window.location.search);
        if ( matches === null ) { return; }
        try {
            details = JSON.parse(atob(matches[1]));
        } catch(ex) {
        }
    })();

    /******************************************************************************/

    uDom('.what').text(details.url);
    // uDom('#why').text(details.why.slice(3));

    /******************************************************************************/

    // https://github.com/gorhill/uMatrix/issues/502
    //   Code below originally imported from:
    //   https://github.com/gorhill/uBlock/blob/master/src/js/document-blocked.js

    (function() {
        if ( typeof URL !== 'function' ) { return; }

        var reURL = /^https?:\/\//;

        var liFromParam = function(name, value) {
            if ( value === '' ) {
                value = name;
                name = '';
            }
            var li = document.createElement('li');
            var span = document.createElement('span');
            span.textContent = name;
            li.appendChild(span);
            if ( name !== '' && value !== '' ) {
                li.appendChild(document.createTextNode(' = '));
            }
            span = document.createElement('span');
            if ( reURL.test(value) ) {
                var a = document.createElement('a');
                a.href = a.textContent = value;
                span.appendChild(a);
            } else {
                span.textContent = value;
            }
            li.appendChild(span);
            return li;
        };

        var safeDecodeURIComponent = function(s) {
            try {
                s = decodeURIComponent(s);
            } catch (ex) {
            }
            return s;
        };

        var renderParams = function(parentNode, rawURL) {
            var a = document.createElement('a');
            a.href = rawURL;
            if ( a.search.length === 0 ) { return false; }

            var pos = rawURL.indexOf('?');
            var li = liFromParam(
                vAPI.i18n('docblockedNoParamsPrompt'),
                rawURL.slice(0, pos)
            );
            parentNode.appendChild(li);

            var params = a.search.slice(1).split('&');
            var param, name, value, ul;
            for ( var i = 0; i < params.length; i++ ) {
                param = params[i];
                pos = param.indexOf('=');
                if ( pos === -1 ) {
                    pos = param.length;
                }
                name = safeDecodeURIComponent(param.slice(0, pos));
                value = safeDecodeURIComponent(param.slice(pos + 1));
                li = liFromParam(name, value);
                if ( reURL.test(value) ) {
                    ul = document.createElement('ul');
                    renderParams(ul, value);
                    li.appendChild(ul);
                }
                parentNode.appendChild(li);
            }
            return true;
        };

        if ( renderParams(uDom.nodeFromId('parsed'), details.url) === false ) {
            return;
        }

        var toggler = document.createElement('span');
        toggler.className = 'fa';
        uDom('#theURL > p').append(toggler);

        uDom(toggler).on('click', function() {
            var collapsed = uDom.nodeFromId('theURL').classList.toggle('collapsed');
            vAPI.localStorage.setItem(
                'document-blocked-collapse-url',
                collapsed.toString()
            );
        });

        uDom.nodeFromId('theURL').classList.toggle(
            'collapsed',
            vAPI.localStorage.getItem('document-blocked-collapse-url') === 'true'
        );
    })();

    /******************************************************************************/

    if ( window.history.length > 1 ) {
        uDom('#back').on('click', function() { window.history.back(); });
        uDom('#bye').css('display', 'none');
    } else {
        uDom('#bye').on('click', function() { window.close(); });
        uDom('#back').css('display', 'none');
    }

    /******************************************************************************/

    // See if the target hostname is still blacklisted, and if not, navigate to it.

    vAPI.messaging.send('main-blocked.js', {
        what: 'mustBlock',
        scope: details.hn,
        hostname: details.hn,
        type: 'doc'
    }, function(response) {
        if ( response === false ) {
            window.location.replace(details.url);
        }
    });

    /******************************************************************************/

})();

/******************************************************************************/