
// HELPERS
/*jslint esversion: 6*/
/*global console,require,exports,XMLHttpRequest*/

"use strict";

// In Firefox, there is no console.log in PromiseWorker, but there is worker.log.
// In Thunderbird, you can’t access to console directly. So it’s required to pass a log function.
let funcOutput = null;

var helpers = {

    setLogOutput: function (func) {
        // probably obsolete now, as console.log seems to work everywhere (at last!)
        funcOutput = func;
    },

    echo: function (obj) {
        // probably obsolete now, as console.log seems to work everywhere (at last!)
        if (funcOutput !== null) {
            funcOutput(obj);
        } else {
            console.log(obj);
        }
        return true;
    },

    logerror: function (e, bStack=false) {
        let sMsg = "\n" + e.fileName + "\n" + e.name + "\nline: " + e.lineNumber + "\n" + e.message;
        if (bStack) {
            sMsg += "\n--- Stack ---\n" + e.stack;
        }
        if (funcOutput !== null) {
            funcOutput(sMsg);
        } else {
            console.error(sMsg);
        }
    },

    inspect: function (o) {
        let sMsg = "__inspect__: " + typeof o;
        for (let sParam in o) {
            sMsg += "\n" + sParam + ": " + o.sParam;
        }
        sMsg += "\n" + JSON.stringify(o) + "\n__end__";
        this.echo(sMsg);
    },

    loadFile: function (spf) {
        // load ressources in workers (suggested by Mozilla extensions reviewers)
        // for more options have a look here: https://gist.github.com/Noitidart/ec1e6b9a593ec7e3efed
        // if not in workers, use sdk/data.load() instead
        try {
            let xRequest;
            if (typeof XMLHttpRequest !== "undefined") {
                xRequest = new XMLHttpRequest();
            } else {
                // JS sucks again… necessary for Thunderbird
                let { Cc, Ci } = require("chrome");
                xRequest = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"].createInstance();
                xRequest.QueryInterface(Ci.nsIXMLHttpRequest);
            }
            xRequest.open('GET', spf, false); // 3rd arg is false for synchronous, sync is acceptable in workers
            xRequest.overrideMimeType('text/json');
            xRequest.send();
            return xRequest.responseText;
        }
        catch (e) {
            this.logerror(e);
            return null;
        }
    },

    // conversions
    objectToMap: function (obj) {
        if (obj == null) {
            return null;
        }
        let m = new Map();
        for (let param in obj) {
            m.set(param, obj[param]);
        }
        return m;
    },

    mapToObject: function (m) {
        if (m == null) {
            return null;
        }
        let obj = {};
        for (let [k, v] of m) {
            obj[k] = v;
        }
        return obj;
    }
};


if (typeof(exports) !== 'undefined') {
    exports.setLogOutput = helpers.setLogOutput;
    exports.echo = helpers.echo;
    exports.logerror = helpers.logerror;
    exports.inspect = helpers.inspect;
    exports.loadFile = helpers.loadFile;
    exports.objectToMap = helpers.objectToMap;
    exports.mapToObject = helpers.mapToObject;
}
