marker.js

/*
    marker.js - sobnik.chrome module

    Copyright (c) 2014 Artur Brugeman <brugeman.artur@gmail.com>
    Copyright other contributors as noted in the AUTHORS file.

    This file is part of sobnik.chrome, Sobnik plugin for Chrome:
    http://sobnik.com.

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

    This software 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
    Lesser General Public License for more details.

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

;(function () {

    console.log ("Loading marker");

    var sobnik = window.sobnik;
    console.assert (sobnik, "Sobnik required");

    var cmn = sobnik.require ("cmn");
    var server = sobnik.require ("server.tab");
    var board = sobnik.require ("boards/current");

    var lastMarkList = {};
    function markListDraw (map, ads)
    {
        for (var i = 0; i < ads.length; i++)
        {
            var a = ads[i];
            if (!map[a.AdId])
                continue;

            if (lastMarkList[a.AdId])
                $(lastMarkList[a.AdId]).remove ();

            var row = map[a.AdId].row;
            var mark = board.list.mark (row, a);
//          console.log ("Mark", a, row, mark);
            lastMarkList[a.AdId] = mark;
            delete map[a.AdId];
        }
    }

    var lastMarkPage = [];
    function markPageDraw (ads)
    {
        var ads = ads || [];
        if (!ads.length)
            return;

        console.log ("Removing...");
        console.log (lastMarkPage);
        for (var i = 0; i < lastMarkPage.length; i++)
            $(lastMarkPage[i]).remove ();
        lastMarkPage = [];

        if (ads == null)
            return

        var id = board.url2id (location.href);
        // some boards change the url while user
        // browses photos etc (irr)
        if (!id)
            return

        for (var i = 0; i < ads.length; i++)
        {
            var a = ads[i];
            if (a.AdId != id)
                continue;

            for (var i = 0; i < board.page.marks.length; i++)
            {
                var parent = $(board.page.marks[i].selector);
                var mark = board.page.marks[i].mark (parent, a);
                lastMarkPage.push (mark);
            }
            break;
        }
    }

    function gatherList ()
    {
        var rows = $(board.list.rowSelector);
//      console.log (rows);
        var map = {};
        var regexp = board.list.pattern ? new RegExp(board.list.pattern) : null;
        rows.each (function(i, row) {
            $(row).find (board.list.hrefSelector).each (function (i, a) {
                var url = $(a).attr("href");
//              console.log ("Url "+url+" rx "+regexp);
                if (regexp && !regexp.test(url))
                    return;

                if (!url.match ("^(http[s]?:)?//"))
                    url = location.origin + url;
//              console.log ("Url", url);

                var id = board.url2id (url);
                console.assert (id, "Bad ad id "+url);
                map[id] = {row: row, url: url};
            });
        });

        return map;
    }

    var sobnikDelayMult = 1.0;
    function startSobnik (ads, delay, dataCallback, retryCallback)
    {
        var request = {Ads: ads};

        function backoff (mult)
        {
            sobnikDelayMult *= mult;
            if (sobnikDelayMult > 10.0)
                sobnikDelayMult = 10.0;
            if (retryCallback)
                cmn.later (delay * sobnikDelayMult, retryCallback);
        }

        function errback ()
        {
            // backoff faster on error
            backoff (2.0);
        }

        server.sobnik (request, function (data) {
            if (data && data.Ads)
                dataCallback (data.Ads);

            // backoff slowly
            backoff (1.1);

        }, errback);
    }

    function markList ()
    {
        // min delay
        var delay = cmn.rdelay (5, 10)

        var tryMark = function (firstTry)
        {
            var map = gatherList ();
            var ads = [];
            for (var id in map)
                ads.push ({AdId: id, Url: map[id].url});

            console.log ("Sobnik "+ads.length);

            if (ads.length == 0)
                return;

            if (typeof firstTry !== 'undefined')
                markListDraw (map, ads);

            startSobnik (ads, delay, function (ads) {

                // draw
                markListDraw (map, ads);

            }, tryMark);
        }

        tryMark (true);
    }

    function markPage ()
    {
        var delay = cmn.rdelay (1, 2);

        var first = true;
        var tryMark = function (firstTry)
        {
            var id = board.url2id (location.href);
            if (!id)
            {
                // some boards change url while user browses
                // photos etc (irr)
                cmn.later (delay, function () {
                    tryMark (first);
                });
                return
            }

            first = false;
            var ads = [{AdId: id, Url: location.href}];

            if (typeof firstTry !== 'undefined')
                markPageDraw (ads);

            startSobnik (ads, delay, function (data) {

                // draw
                markPageDraw (data);

            }, tryMark);
        }

        tryMark (true);
    }

    function startMarkList ()
    {
        // we wait a while to let user navigate
        // somewhere else if this page was intermediate
        var delay = 10000;
        cmn.later (delay, function () {
            if (cmn.matchRxs (location.href, board.list.urls))
            {
                console.log ("Marking list");
                markList ();
            }
            else
                console.log ("Not marking list");
        })
    }

    function startMarkPage ()
    {
        if (cmn.matchRxs (location.href, board.urls))
        {
            console.log ("Marking page");
            markPage ();
        }
        else
            console.log ("Not marking page");
    }

    // public
    function start ()
    {
        startMarkList ();
        startMarkPage ();
    }

    sobnik.marker = {
        start: start,
    }

}) ();