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import Utils from './utils';
class Framework7Class {
constructor(params = {}, parents = []) {
const self = this;
self.params = params;
// Events
self.eventsParents = parents;
self.eventsListeners = {};
if (self.params && self.params.on) {
Object.keys(self.params.on).forEach((eventName) => {
self.on(eventName, self.params.on[eventName]);
});
}
}
on(events, handler) {
const self = this;
if (typeof handler !== 'function') return self;
events.split(' ').forEach((event) => {
if (!self.eventsListeners[event]) self.eventsListeners[event] = [];
self.eventsListeners[event].push(handler);
});
return self;
}
once(events, handler) {
const self = this;
if (typeof handler !== 'function') return self;
function onceHandler(...args) {
handler.apply(self, args);
self.off(events, onceHandler);
}
return self.on(events, onceHandler);
}
off(events, handler) {
const self = this;
if (!self.eventsListeners) return self;
events.split(' ').forEach((event) => {
if (typeof handler === 'undefined') {
self.eventsListeners[event] = [];
} else {
self.eventsListeners[event].forEach((eventHandler, index) => {
if (eventHandler === handler) {
self.eventsListeners[event].splice(index, 1);
}
});
}
});
return self;
}
emit(...args) {
const self = this;
if (!self.eventsListeners) return self;
let events;
let data;
let context;
let eventsParents;
if (typeof args[0] === 'string' || Array.isArray(args[0])) {
events = args[0];
data = args.slice(1, args.length);
context = self;
eventsParents = self.eventsParents;
} else {
events = args[0].events;
data = args[0].data;
context = args[0].context || self;
eventsParents = args[0].local ? [] : args[0].parents || self.eventsParents;
}
const eventsArray = Array.isArray(events) ? events : events.split(' ');
const localEvents = eventsArray.map(eventName => eventName.replace('local::', ''));
const parentEvents = eventsArray.filter(eventName => eventName.indexOf('local::') < 0);
localEvents.forEach((event) => {
if (self.eventsListeners[event]) {
const handlers = [];
self.eventsListeners[event].forEach((eventHandler) => {
handlers.push(eventHandler);
});
handlers.forEach((eventHandler) => {
eventHandler.apply(context, data);
});
}
});
if (eventsParents && eventsParents.length > 0) {
eventsParents.forEach((eventsParent) => {
eventsParent.emit(parentEvents, ...data);
});
}
return self;
}
useModulesParams(instanceParams) {
const instance = this;
if (!instance.modules) return;
Object.keys(instance.modules).forEach((moduleName) => {
const module = instance.modules[moduleName];
// Extend params
if (module.params) {
Utils.extend(instanceParams, module.params);
}
});
}
useModules(modulesParams = {}) {
const instance = this;
if (!instance.modules) return;
Object.keys(instance.modules).forEach((moduleName) => {
const module = instance.modules[moduleName];
const moduleParams = modulesParams[moduleName] || {};
// Extend instance methods and props
if (module.instance) {
Object.keys(module.instance).forEach((modulePropName) => {
const moduleProp = module.instance[modulePropName];
if (typeof moduleProp === 'function') {
instance[modulePropName] = moduleProp.bind(instance);
} else {
instance[modulePropName] = moduleProp;
}
});
}
// Add event listeners
if (module.on && instance.on) {
Object.keys(module.on).forEach((moduleEventName) => {
instance.on(moduleEventName, module.on[moduleEventName]);
});
}
// Module create callback
if (module.create) {
module.create.bind(instance)(moduleParams);
}
});
}
static set components(components) {
const Class = this;
if (!Class.use) return;
Class.use(components);
}
static installModule(module, ...params) {
const Class = this;
if (!Class.prototype.modules) Class.prototype.modules = {};
const name = module.name || (`${Object.keys(Class.prototype.modules).length}_${Utils.now()}`);
Class.prototype.modules[name] = module;
// Prototype
if (module.proto) {
Object.keys(module.proto).forEach((key) => {
Class.prototype[key] = module.proto[key];
});
}
// Class
if (module.static) {
Object.keys(module.static).forEach((key) => {
Class[key] = module.static[key];
});
}
// Callback
if (module.install) {
module.install.apply(Class, params);
}
return Class;
}
static use(module, ...params) {
const Class = this;
if (Array.isArray(module)) {
module.forEach(m => Class.installModule(m));
return Class;
}
return Class.installModule(module, ...params);
}
}
export default Framework7Class;