/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* This library 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 2.1 of the License, or (at your option)
* any later version.
*
* This library 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.
*/
import {buildFragment} from 'metal-dom';
import State, {Config} from 'metal-state';
import GeoJSONBase from './GeoJSONBase.es';
import MarkerBase from './MarkerBase.es';
import {isSubsetOf} from './validators.es';
/**
* HTML template string used for generating the home button that is
* used for centering the map at the user location or the original position.
* @review
* @type {string}
*/
const TPL_HOME_BUTTON = `
<button class='btn btn-secondary home-button'>
<i class='glyphicon glyphicon-screenshot'></i>
</button>
`;
/**
* HTML template string used for generating the search box that is used
* for looking for map locations.
* @review
* @type {string}
*/
const TPL_SEARCH_BOX = `
<div class='col-md-6 search-controls'>
<input class='search-input' placeholder='' type='text' />
<div>
`;
/**
* Object that will hold callbacks waiting for being executed
* when maps are created.
* @review
* @see MapBase.register()
* @see MapBase.get()
*/
const pendingCallbacks = {};
/**
* MapBase
* Each instance represents the map object itself, and adds
* all necesary listeners and object specified in the given
* configuration. This class is the core of the module, and
* will create instances of all the other objects, including
* the native maps implemented by inheriting classes.
* @abstract
* @review
*/
class MapBase extends State {
/**
* MapBase constructor
* @param {Array} args List of arguments to be sent to State constructor
* @review
*/
constructor(...args) {
super(...args);
this._customControls = {};
this._dialog = null;
this._eventHandlers = [];
this._geoJSONLayer = null;
this._geocoder = null;
this._geolocationMarker = null;
this._map = null;
this._originalPosition = null;
this._handleGeoJSONLayerFeatureClicked = this._handleGeoJSONLayerFeatureClicked.bind(
this
);
this._handleGeoJSONLayerFeaturesAdded = this._handleGeoJSONLayerFeaturesAdded.bind(
this
);
this._handleGeoLocationMarkerDragended = this._handleGeoLocationMarkerDragended.bind(
this
);
this._handleHomeButtonClicked = this._handleHomeButtonClicked.bind(
this
);
this._handlePositionChanged = this._handlePositionChanged.bind(this);
this._handleSearchButtonClicked = this._handleSearchButtonClicked.bind(
this
);
this.on('positionChange', this._handlePositionChanged);
const geolocation =
this.position && this.position.location
? this.position.location
: {};
if (!geolocation.lat || !geolocation.lng) {
Liferay.Util.getGeolocation(
(lat, lng) => {
this._initializeLocation({lat, lng});
},
() => {
this.zoom = 2;
this._initializeLocation({lat: 0, lng: 0});
}
);
}
else {
this._initializeLocation(geolocation);
}
}
/**
* Destroys the existing _geoJSONLayer and _customControls[SEARCH]
* @review
* @see MapBase._initializeMap()
* @see MapBase._createCustomControls()
*/
destructor() {
if (this._geoJSONLayer) {
this._geoJSONLayer.dispose();
this._geoJSONLayer = null;
}
if (
this._customControls &&
this._customControls[this.constructor.CONTROLS.SEARCH]
) {
this._customControls[this.constructor.CONTROLS.SEARCH].dispose();
this._customControls[this.constructor.CONTROLS.SEARCH] = null;
}
}
/**
* @protected
* @review
*
* Add event listeners to:
* @see this._geoJSONLayer
* @see this._geolocationMarker
* @see this._customControls
*
* All added listeners are implemented as binded methods:
* @see this._handleGeoJSONLayerFeaturesAdded
* @see this._handleGeoJSONLayerFeatureClicked
* @see this._handleGeoLocationMarkerDragended
* @see this._handleHomeButtonClicked
* @see this._handleSearchButtonClicked
*/
_bindUIMB() {
if (this._geoJSONLayer) {
this._geoJSONLayer.on(
'featuresAdded',
this._handleGeoJSONLayerFeaturesAdded
);
this._geoJSONLayer.on(
'featureClick',
this._handleGeoJSONLayerFeatureClicked
);
}
if (this._geolocationMarker) {
this._geolocationMarker.on(
'dragend',
this._handleGeoLocationMarkerDragended
);
}
if (this._customControls) {
const homeControl = this._customControls[
this.constructor.CONTROLS.HOME
];
const searchControl = this._customControls[
this.constructor.CONTROLS.SEARCH
];
if (homeControl) {
homeControl.addEventListener(
'click',
this._handleHomeButtonClicked
);
}
if (searchControl) {
searchControl.on('search', this._handleSearchButtonClicked);
}
}
}
/**
* Creates existing custom controls and stores them inside _customControls.
* It only adds the home button and the search box if the corresponding
* flags are activated inside MapBase.controls.
* @protected
* @review
*/
_createCustomControls() {
const controls = this.controls || [];
const customControls = {};
if (controls.indexOf(this.constructor.CONTROLS.HOME) !== -1) {
const homeControl = buildFragment(TPL_HOME_BUTTON).querySelector(
'.btn.btn-secondary.home-button'
);
customControls[this.constructor.CONTROLS.HOME] = homeControl;
this.addControl(
homeControl,
this.constructor.POSITION.RIGHT_BOTTOM
);
}
if (
controls.indexOf(this.constructor.CONTROLS.SEARCH) !== -1 &&
this.constructor.SearchImpl
) {
const searchControl = buildFragment(TPL_SEARCH_BOX).querySelector(
'div.col-md-6.search-controls'
);
customControls[
this.constructor.CONTROLS.SEARCH
] = new this.constructor.SearchImpl({
inputNode: searchControl.querySelector('input'),
});
this.addControl(searchControl, this.constructor.POSITION.TOP_LEFT);
}
this._customControls = customControls;
}
/**
* Creates a new map for the given location and controlsConfig.
* @abstract
* @param {Object} location
* @param {Object} controlsConfig
* @protected
* @return {Object} Created map
* @review
*/
_createMap(
/* eslint-disable no-unused-vars */
location,
controlsConfig
/* eslint-enable no-unused-vars */
) {
throw new Error('This method must be implemented');
}
/**
* Returns an object with the control configuration associated to the
* existing controls (MapBase.controls).
* @protected
* @return {Object} Object with the control options with the following shape:
* for each control, there is a corresponding [control] attribute with a
* boolean value indicating if there is a configuration for the control. If
* true, where will be a [control]Options attribute with the configuration
* content.
* @review
*/
_getControlsConfig() {
const config = {};
const availableControls = this.controls.map(item => {
return typeof item === 'string' ? item : item.name;
});
Object.keys(this.constructor.CONTROLS_MAP).forEach(key => {
const controlIndex = availableControls.indexOf(key);
const value = this.constructor.CONTROLS_MAP[key];
if (controlIndex > -1) {
const controlConfig = this.controls[controlIndex];
if (
controlConfig &&
typeof controlConfig === 'object' &&
controlConfig.cfg
) {
config[`${value}Options`] = controlConfig.cfg;
}
config[value] = controlIndex !== -1;
}
});
return config;
}
/**
* If there is an existing this._dialog, it returns it.
* Otherwise, if the MapBase.DialogImpl class has been set, it creates
* a new instance with the existing map and returns it.
* @protected
* @return {MapBase.DialogImpl|null}
* @review
*/
_getDialog() {
if (!this._dialog && this.constructor.DialogImpl) {
this._dialog = new this.constructor.DialogImpl({
map: this._map,
});
}
return this._dialog;
}
/**
* If there is an existing this._geocoder, it returns it.
* Otherwise, if the MapBase.GeocoderImpl class has been set, it creates
* a new instance and returns it.
* @protected
* @return {MapBase.GeocoderImpl|null}
* @review
*/
_getGeocoder() {
if (!this._geocoder && this.constructor.GeocoderImpl) {
this._geocoder = new this.constructor.GeocoderImpl();
}
return this._geocoder;
}
/**
* Event handler executed when any feature is added to the existing.
* GeoJSONLayer. It will update the current position if necesary.
* @param {{ features: Array<Object> }} param0 Array of features that
* will be processed.
* @protected
* @review
* @see MapBase.getBounds()
* @see MapBase.position
*/
_handleGeoJSONLayerFeaturesAdded({features}) {
const bounds = this.getBounds();
const locations = features.map(feature => feature.getGeometry().get());
if (locations.length > 1) {
locations.forEach(location => bounds.extend(location));
}
else {
this.position = {location: locations[0]};
}
}
/**
* Event handler executed when a GeoJSONLayer feature is clicked. It
* simple propagates the event with the given feature.
* @param {{ feature: Object }} param0 Feature to be propagated.
* @protected
* @review
*/
_handleGeoJSONLayerFeatureClicked({feature}) {
this.emit('featureClick', {feature});
}
/**
* Event handler executed when the geolocation marker has been dragged to
* a new position. It updates the instance position.
* @param {{ location: Object }} param0 New marker location.
* @protected
* @review
* @see MapBase._getGeoCoder()
* @see MapBase.position
*/
_handleGeoLocationMarkerDragended({location}) {
this._getGeocoder().reverse(location, ({data}) => {
this.position = data;
});
}
/**
* Event handler executed when the home button GeoJSONLayer feature is
* clicked. It resets the instance position to _originalPosition and stops
* the event propagation.
* @param {Event} event Click event.
* @review
* @see MapBase.position
* @see MapBase._originalPosition
*/
_handleHomeButtonClicked(event) {
event.preventDefault();
this.position = this._originalPosition;
}
/**
* Event handler executed when the user position changes. It centers the map
* and, if existing, updates the _geolocationMarker position.
* @param {{ newVal: { location: Object } }} param0 New location information.
* @review
* @see MapBase.setCenter()
* @see MapBase._geolocationMarker
*/
_handlePositionChanged({newVal: {location}}) {
this.setCenter(location);
if (this._geolocationMarker) {
this._geolocationMarker.setPosition(location);
}
}
/**
* Event handler executed when the search button GeoJSONLayer feature has
* been clicked. It updates the instance position.
* @param {{ position: Object }} param0 New position.
* @review
* @see MapBase.position
*/
_handleSearchButtonClicked({position}) {
this.position = position;
}
/**
* If this.data has a truthy value and this._geoJSONLayer has been
* set, it tries to parse geoJSON information with _geoJSONLayer.addData()
* @protected
* @review
* @see this._geoJSONLayer
* @see this.data
*/
_initializeGeoJSONData() {
if (this.data && this._geoJSONLayer) {
this._geoJSONLayer.addData(this.data);
}
}
/**
* Initializes the instance map using the given location and, if
* this.geolocation property is true, tries to get the location using
* the geocoder.
* @param {Object} location Location object user for map initialization.
* @protected
* @review
* @see this._initializeMap()
* @see this._getGeocoder()
*/
_initializeLocation(geolocation) {
const geocoder = this._getGeocoder();
if (this.geolocation && geocoder) {
geocoder.reverse(geolocation, ({data}) =>
this._initializeMap(data)
);
}
else {
this._initializeMap({location: geolocation});
}
}
/**
* Creates a new map with the given position and initialize the map
* controls, loads the geoJSONData and, if geolocation is active, creates
* a marker for it.
* @param {Object} position Initial position added to the map.
* @protected
* @review
* @see MapBase._getControlsConfig()
* @see MapBase._createMap()
* @see MapBase.GeoJSONImpl
* @see MapBase.addMarker()
* @see MapBase._createCustomControls()
* @see MapBase._bindUIMB()
* @see MapBase._initializeGeoJSONData()
*/
_initializeMap(position) {
const controlsConfig = this._getControlsConfig();
const geolocation = position.location;
this._originalPosition = position;
this._map = this._createMap(geolocation, controlsConfig);
if (
this.constructor.GeoJSONImpl &&
this.constructor.GeoJSONImpl !== GeoJSONBase
) {
this._geoJSONLayer = new this.constructor.GeoJSONImpl({
map: this._map,
});
}
if (this.geolocation) {
this._geolocationMarker = this.addMarker(geolocation);
}
this.position = position;
this._createCustomControls();
this._bindUIMB();
this._initializeGeoJSONData();
}
/**
* Adds a new control to the interface at the given position.
* @param {Object} control Native control object
* @param {MapBase.POSITION} position Position defined in MapBase class
* @review
*/
addControl(
/* eslint-disable no-unused-vars */
control,
position
/* eslint-enable no-unused-vars */
) {
throw new Error('This method must be implemented');
}
/**
* Returns the map bounds.
* @abstract
* @return {Object} Map bounds
* @review
*/
getBounds() {
throw new Error('This method must be implemented');
}
/**
* Centers the map on the given location.
* @abstract
* @param {Object} location
* @review
*/
setCenter(
/* eslint-disable no-unused-vars */
location
/* eslint-enable no-unused-vars */
) {
throw new Error('This method must be implemented');
}
/**
* If the class MapBase.MarkerImpl has been specified, creates an instance
* of this class with the given location and the existing this._map object
* and returns it.
* @param {Object} location Location object used for the marker position
* @return {MapBase.MarkerImpl}
* @review
*/
addMarker(location) {
let marker;
if (
this.constructor.MarkerImpl &&
this.constructor.MarkerImpl !== MarkerBase
) {
marker = new this.constructor.MarkerImpl({
location,
map: this._map,
});
}
return marker;
}
/**
* Returns the stored map
* @return {Object}
* @review
* @see MapBase._initializeMap()
*/
getNativeMap() {
return this._map;
}
/**
* Adds a listener for the given event using the given context. This
* methods uses MetalJS' functionality, but overrides the context binding
* in order to avoid breaking changes with the old implementation.
* @param {string} eventName Event name that will be listened.
* @param {function} callback Callback executed when the event fires.
* @param {Object} [context] Optional context that will be used for binding
* the callback when specified.
* @return {*} Result of the State.on method.
* @review
* @see State.on
*/
on(eventName, callback, context) {
let boundCallback = callback;
if (context) {
boundCallback = callback.bind(context);
}
return super.on(eventName, boundCallback);
}
/**
* Opens a dialog if this_getDialog() returns a valid object.
* @param {*} dialogConfig Dialog configuration that will be sent to the
* dialog.open() method.
* @review
* @see MapBase._getDialog()
*/
openDialog(dialogConfig) {
const dialog = this._getDialog();
if (dialog) {
dialog.open(dialogConfig);
}
}
/**
* Setter called everytime the position attribute is changed.
* @param {Object} position New position
* @return {Object} The given position object
* @review
*/
setPosition(position) {
this.emit('positionChange', {
newVal: {
address: position.address,
location: position.location,
},
});
return position;
}
}
/**
* Registers the given callback to be executed when the map identified
* by the given id has been created. If the map has already been created, it
* is executed immediatly.
* @param {string} id Id of the map that needs to be created
* @param {function} callback Callback being executed
* @review
*/
MapBase.get = function(id, callback) {
const map = Liferay.component(id);
if (map) {
callback(map);
}
else {
const idPendingCallbacks = pendingCallbacks[id] || [];
idPendingCallbacks.push(callback);
pendingCallbacks[id] = idPendingCallbacks;
}
};
/**
* Registers the given map with the given id, and executes all existing
* callbacks associated with the id. Then it clears the list of callbacks.
* @param {string} id Id of the map that has been created
* @param {Object} map Map that has been created
* @param {string} portletId Id of the portlet that registers the map
* @review
*/
MapBase.register = function(id, map, portletId) {
const componentConfig = portletId ? {portletId} : {destroyOnNavigate: true};
Liferay.component(id, map, componentConfig);
const idPendingCallbacks = pendingCallbacks[id];
if (idPendingCallbacks) {
idPendingCallbacks.forEach(callback => callback(map));
idPendingCallbacks.length = 0;
}
};
/**
* Class that will be used for creating dialog objects.
* @review
*/
MapBase.DialogImpl = null;
/**
* Class that will be used for parsing geoposition information.
* @review
*/
MapBase.GeocoderImpl = null;
/**
* Class that will be used for creating GeoJSON instances.
* This class must be replaced by another one extending GeoJSONBase.
* @review
*/
MapBase.GeoJSONImpl = GeoJSONBase;
/**
* Class that will be used for creating map markers.
* This class must be replaced by another one extending MarkerBase.
* @review
*/
MapBase.MarkerImpl = MarkerBase;
/**
* Class that will be used for creating an instance of searchbox.
* This class must be replaced by another one extending MarkerBase.
* @review
*/
MapBase.SearchImpl = null;
/**
* List of controls that maybe shown inside the rendered map.
* @review
*/
MapBase.CONTROLS = {
ATTRIBUTION: 'attribution',
GEOLOCATION: 'geolocation',
HOME: 'home',
OVERVIEW: 'overview',
PAN: 'pan',
ROTATE: 'rotate',
SCALE: 'scale',
SEARCH: 'search',
STREETVIEW: 'streetview',
TYPE: 'type',
ZOOM: 'zoom',
};
/**
* Control mapping that should be overriden by child classes.
* @review
*/
MapBase.CONTROLS_MAP = {};
/**
* Available map positions.
* @review
*/
MapBase.POSITION = {
BOTTOM: 11,
BOTTOM_CENTER: 11,
BOTTOM_LEFT: 10,
BOTTOM_RIGHT: 12,
CENTER: 13,
LEFT: 5,
LEFT_BOTTOM: 6,
LEFT_CENTER: 4,
LEFT_TOP: 5,
RIGHT: 7,
RIGHT_BOTTOM: 9,
RIGHT_CENTER: 8,
RIGHT_TOP: 7,
TOP: 2,
TOP_CENTER: 2,
TOP_LEFT: 1,
TOP_RIGHT: 3,
};
/**
* Position mapping that should be overriden by child classes.
* @review
*/
MapBase.POSITION_MAP = {};
/**
* State definition.
* @review
* @static
* @type {!Object}
*/
MapBase.STATE = {
/**
* DOM node selector identifying the element that will be used
* for rendering the map
* @review
* @type {string}
*/
boundingBox: Config.string().value(''),
/**
* List of controls that will be shown on the map.
* The full control list is kept inside MapBase.CONTROLS.
* @review
* @type {Array<string>}
*/
controls: Config.validator(
isSubsetOf(Object.values(MapBase.CONTROLS))
).value([
MapBase.CONTROLS.PAN,
MapBase.CONTROLS.TYPE,
MapBase.CONTROLS.ZOOM,
]),
/**
* Data that will be parsed as GeoJSONData
* @review
* @type {Object}
*/
data: Config.object(),
/**
* If true, the geolocation API will be used (if implemented)
* @review
* @type {boolean}
*/
geolocation: Config.bool().value(false),
/**
* Position being shown on the map. This value will be updated
* if the position is changed internally.
* @review
* @type {{ lat: number, lng: number }}
*/
position: Config.shapeOf({
location: Config.shapeOf({
lat: Config.number().value(0),
lng: Config.number().value(0),
}),
})
.value({
location: {lat: 0, lng: 0},
})
.setter('setPosition'),
/**
* Zoom being used on the map.
* @review
* @type {number}
*/
zoom: Config.number().value(11),
};
Liferay.MapBase = MapBase;
export default MapBase;
export {MapBase};