sweetp/dashboard

'use strict';

angular.module('keyboardShortcuts', []).provider('KeyboardShortcuts', function () {
    var providedCombosConfig, sectionDescriptions;

    providedCombosConfig = {};
    sectionDescriptions = {};

    this.addCombos = function (key, description, map) {
        if (!map) {
            return;
        }

        if (!providedCombosConfig[key]) {
            // create section
            providedCombosConfig[key] = {};
        }

        // save description
        sectionDescriptions[key] = description;

        // assign combos
        _.assign(providedCombosConfig[key], map);
    };

    this.$get = function($window, $log) {
        var KeyboardShortcuts, lib;

        lib = $window.keypress;

        KeyboardShortcuts = stampit().state({
            lib:lib,
            configuredCombos:providedCombosConfig,
            sectionDescriptions:sectionDescriptions
        });

        KeyboardShortcuts.methods({
            createListener:function () {
                return new lib.Listener();
            },
            getConfiguredCombos:function (sectionKey, listener) {
                return _(listener)
                    .map(function (configOverride, key) {
                        var config;

                        if (!this.configuredCombos[sectionKey] ||
                            !this.configuredCombos[sectionKey][key]) {
                            $log.error('Keyboard combo found without configuration.', key, this.configuredCombos);
                            return null;
                        }

                        config = _.cloneDeep(this.configuredCombos[sectionKey][key]);
                        return _.assign(config, configOverride);
                    }, this)
                    .compact()
                    .value()
                    ;
            },
            applyScopeTo:function (scope, combos) {
                combos.forEach(function(combo) {
                    var onKeyDown, onKeyUp;

                    if (combo.on_keydown) {
                        onKeyDown = combo.on_keydown;
                        combo.on_keydown = function () {
                            onKeyDown();
                            scope.$apply();
                        };
                    }

                    if (combo.on_keyup) {
                        onKeyUp = combo.on_keyup;
                        combo.on_keyup = function () {
                            onKeyUp();
                            scope.$apply();
                        };
                    }
                });
            }
        });

        // build singleton
        return KeyboardShortcuts;
    };
});