diff options
Diffstat (limited to 'main.mjs')
| -rw-r--r-- | main.mjs | 1135 |
1 files changed, 980 insertions, 155 deletions
@@ -1,229 +1,1054 @@ class Device { - #deviceName - #primaryServiceUuid - #writeCharacteristicUuid - #notifyCharacteristicUuid - - constructor(deviceName, primaryServiceUuid, writeCharacteristicUuid, notifyCharacteristicUuid) { - this.#deviceName = deviceName - this.#primaryServiceUuid = primaryServiceUuid - this.#writeCharacteristicUuid = writeCharacteristicUuid - this.#notifyCharacteristicUuid = notifyCharacteristicUuid - } - - static airmxPro() { - return new Device( - 'AIRMX Pro', - '22210000-554a-4546-5542-46534450464d', - '22210001-554a-4546-5542-46534450464d', - '22210002-554a-4546-5542-46534450464d' + #deviceName + #primaryServiceUuid + #writeCharacteristicUuid + #notifyCharacteristicUuid + + constructor(deviceName, primaryServiceUuid, writeCharacteristicUuid, notifyCharacteristicUuid) { + this.#deviceName = deviceName + this.#primaryServiceUuid = primaryServiceUuid + this.#writeCharacteristicUuid = writeCharacteristicUuid + this.#notifyCharacteristicUuid = notifyCharacteristicUuid + } + + static airmxPro() { + return new Device( + 'AIRMX Pro', + '22210000-554a-4546-5542-46534450464d', + '22210001-554a-4546-5542-46534450464d', + '22210002-554a-4546-5542-46534450464d' + ) + } + + get name() { + return this.#deviceName + } + + get primaryServiceUuid() { + return this.#primaryServiceUuid + } + + get writeCharacteristicUuid() { + return this.#writeCharacteristicUuid + } + + get notifyCharacteristicUuid() { + return this.#notifyCharacteristicUuid + } +} + +class Dispatcher { + #characteristic + #sequenceNumber = 1 + #chunkSize = 16 + + constructor(characteristic) { + this.#characteristic = characteristic + } + + async dispatch(command) { + const data = this.#chunk(command.payload, command) + + for (let chunk of data) { + console.log(`Sending chunk: ${Array.from(chunk).map(b => b.toString(16).padStart(2, '0')).join(' ')}`) + await this.#characteristic.writeValueWithResponse(chunk) + await Clock.delay(500) + } + } + + #chunk(data, command) { + const packets = this.#chunked(data, this.#chunkSize) + const total = packets.length + + if (total === 0) { + return [ + this.#packetHeader( + this.#sequenceNumber++, 1, 1, // 1 of 1 packet + command.commandId ) + ] } - get name() { - return this.#deviceName + return packets.map((chunk, index) => { + return new Uint8Array([ + ...this.#packetHeader( + this.#sequenceNumber++, index + 1, total, + command.commandId + ), + ...chunk + ]) + }) + } + + /** + * Splits an array into chunks of `size`. + * + * @param {Uint8Array} data - The array of 8-bit unsigned integers. + * @param {number} size - The size of each chunk. + */ + #chunked(data, size) { + const packets = [] + + for (let i = 0; i < data.length; i += size) { + packets.push(data.slice(i, i + size)) } - get primaryServiceUuid() { - return this.#primaryServiceUuid + return packets + } + + #packetHeader(sequenceNumber, currentPacket, totalPacket, commandId) { + return new Uint8Array([ + sequenceNumber, + currentPacket << 4 | totalPacket, + 0x00, // Unencrypted flag + commandId + ]) + } +} + +class BluetoothHandler { + #device + #dispatcher = null + #gatt = null + #writeCharacteristic = null + #notifyCharacteristic = null + #notificationHandler = null + + /** + * @param {Device} device + */ + constructor(device) { + this.#device = device + } + + async connect() { + const device = await navigator.bluetooth.requestDevice({ + filters: [{ name: this.#device.name }], + optionalServices: [this.#device.primaryServiceUuid] + }) + + this.#gatt = await device.gatt.connect() + const service = await this.#gatt.getPrimaryService(this.#device.primaryServiceUuid) + this.#writeCharacteristic = await service.getCharacteristic(this.#device.writeCharacteristicUuid) + this.#notifyCharacteristic = await service.getCharacteristic(this.#device.notifyCharacteristicUuid) + this.#dispatcher = new Dispatcher(this.#writeCharacteristic) + + await this.#notifyCharacteristic.startNotifications() + this.#notifyCharacteristic.addEventListener('characteristicvaluechanged', this.#handleNotification.bind(this)) + } + + async disconnect() { + if (this.#notifyCharacteristic) { + await this.#notifyCharacteristic.stopNotifications() + this.#notifyCharacteristic.removeEventListener('characteristicvaluechanged', this.#handleNotification.bind(this)) + this.#notifyCharacteristic = null + } + + this.#dispatcher = null + this.#writeCharacteristic = null + + if (this.#gatt) { + this.#gatt.disconnect() + this.#gatt = null } + } - get writeCharacteristicUuid() { - return this.#writeCharacteristicUuid + /** + * @param {Command} command - The command to dispatch. + */ + async dispatch(command) { + if (! this.#dispatcher) { + return } + await this.#dispatcher.dispatch(command) + return this + } + + onNotification(handler) { + this.#notificationHandler = handler + return this + } - get notifyCharacteristicUuid() { - return this.#notifyCharacteristicUuid + #handleNotification(event) { + if (this.#notificationHandler) { + this.#notificationHandler(event) } + } } -class Dispatcher { - #characteristic - #sequenceNumber = 1 - #chunkSize = 16 +class Command { + get commandId() { + throw new Error('The command ID does not exist.') + } + + get payload() { + throw new Error('The payload does not exist.') + } +} + +class HandshakeCommand extends Command { + get commandId() { + return 0x0b + } + + get payload() { + return new Uint8Array([ + 0x08, // The storage size of the token + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Token: 0 + 0x05, // The length of the version + 0x31, 0x2e, 0x30, 0x2e, 0x30 // Version: 1.0.0 + ]) + } +} + +class ConfigureWifiCommand extends Command { + #ssid + #password + + constructor(ssid, password) { + super() + this.#ssid = ssid + this.#password = password + } + + get commandId() { + return 0x15 + } + + get payload() { + const encoder = new TextEncoder() + const ssid = encoder.encode(this.#ssid) + const password = encoder.encode(this.#password) + + return new Uint8Array([ + ssid.length, ...ssid, + password.length, ...password + ]) + } +} + +class RegisterCommand extends Command { + get commandId() { + return 0x16 + } + + get payload() { + return new Uint8Array([ + // + ]) + } +} - constructor(characteristic) { - this.#characteristic = characteristic +class Clock { + static delay(ms) { + return new Promise(resolve => setTimeout(resolve, ms)) + } +} + +class IncomingMessageHandler { + /** @type {IncomingMessage[]} */ + #bag = [] + + #messageHandler = null + + /** + * @param {DataView} view + */ + handle(view) { + const message = IncomingMessage.parse(view) + this.#addToBag(message) + } + + onMessage(handler) { + this.#messageHandler = handler + return this + } + + /** + * @param {IncomingMessage} message + */ + #addToBag(message) { + this.#bag.push(message) + + if (message.currentPacket === message.totalPacket) { + this.#processBag() } + } - async dispatch(command) { - const data = this.#chunk(command.payload, command) + #processBag() { + const bag = [...this.#bag] + const lastMessage = bag.at(-1) - for (let chunk of data) { - console.log(`Sending chunk: ${Array.from(chunk).map(b => b.toString(16).padStart(2, '0')).join(' ')}`) - await this.#characteristic.writeValueWithResponse(chunk) - await delay(500) - } + if (bag.length !== lastMessage.totalPacket) { + throw new Error('Incomplete message received.') } - #chunk(data, command) { - const packets = this.#chunked(data, this.#chunkSize) - const total = packets.length + let data = new Uint8Array() - if (total === 0) { - return [ - this.#packetHeader( - this.#sequenceNumber++, 1, 1, // 1 of 1 packet - command.commandId - ) - ] - } + for (const [index, message] of bag.entries()) { + if (message.currentPacket !== index + 1) { + throw new Error(`Message packet ${index + 1} is missing.`) + } - return packets.map((chunk, index) => { - return new Uint8Array([ - ...this.#packetHeader( - this.#sequenceNumber++, index + 1, total, - command.commandId - ), - ...chunk - ]) - }) + const temp = new Uint8Array(data.byteLength + message.payload.byteLength) + temp.set(data) + temp.set(message.payload, data.byteLength) + data = temp } - /** - * Splits an array into chunks of `size`. - * - * @param {Uint8Array} data - The array of 8-bit unsigned integers. - * @param {number} size - The size of each chunk. - */ - #chunked(data, size) { - const packets = [] + const completeMessage = new CompleteMessage( + lastMessage.commandId, new DataView(data.buffer) + ) + + this.#notify(completeMessage) + this.#clearBag() + } - for (let i = 0; i < data.length; i += size) { - packets.push(data.slice(i, i + size)) - } + #clearBag() { + this.#bag = [] + } - return packets + /** + * @param {CompleteMessage} message + */ + #notify(message) { + if (this.#messageHandler) { + this.#messageHandler(message) } + } +} + +class IncomingMessage { + /** + * @param {number} sequenceNumber - The sequence number of the packet. + * @param {number} currentPacket - The current packet number. + * @param {number} totalPacket - The total number of packets. + * @param {boolean} encrypted - Determines if the packet is encrypted. + * @param {number} commandId - The command ID. + * @param {Uint8Array} payload - The message payload. + */ + constructor(sequenceNumber, currentPacket, totalPacket, encrypted, commandId, payload) { + this.sequenceNumber = sequenceNumber + this.currentPacket = currentPacket + this.totalPacket = totalPacket + this.encrypted = encrypted + this.commandId = commandId + this.payload = payload + } - #packetHeader(sequenceNumber, currentPacket, totalPacket, commandId) { - return new Uint8Array([ - sequenceNumber, - currentPacket << 4 | totalPacket, - 0x00, // Unencrypted flag - commandId - ]) + /** + * @param {DataView} view - The raw packet data. + * @returns {IncomingMessage} + */ + static parse(view) { + if (view.byteLength < 4) { + throw new Error('Invalid packet length.') } + + const sequenceNumber = view.getUint8(0) + const currentPacket = view.getUint8(1) >> 4 + const totalPacket = view.getUint8(1) & 0x0f + const encrypted = view.getUint8(2) + const commandId = view.getUint8(3) + + return new IncomingMessage( + sequenceNumber, currentPacket, totalPacket, + !! encrypted, commandId, new Uint8Array(view.buffer.slice(4)) + ) + } } -class Command { - get commandId() { - throw new Error('The command ID does not exist.') +class CompleteMessage { + /** + * @param {number} commandId - The command ID of the message. + * @param {DataView} payload - The message payload. + */ + constructor(commandId, payload) { + this.commandId = commandId + this.payload = payload + } +} + +class Countdown { + #clock = null + #stopHandler = null + #completeHandler = null + + /** + * @param {HTMLElement|null} el - The HTML element to display the countdown. + * @param {number} seconds - The number of seconds for the countdown. + */ + constructor(el, seconds) { + this.el = el + this.seconds = seconds + + if (this.el === null) { + throw new Error('The HTML element could not be found to mount the countdown.') } + } - get payload() { - throw new Error('The payload does not exist.') + start() { + this.stop() + + let remaining = this.seconds + this.#clock = setInterval(() => { + this.el.textContent = `${--remaining}s` + if (remaining === 0) { + this.stop() + this.notifyComplete() + } + }, 1000) + } + + stop() { + if (! this.#clock) { + return } -} -class HandshakeCommand extends Command { - get commandId() { - return 0x0b + clearInterval(this.#clock) + this.#clock = null + + if (this.#stopHandler) { + this.#stopHandler() } + } + + onStop(callback) { + this.#stopHandler = callback + } - get payload() { - return new Uint8Array([ - 0x08, // The storage size of the token - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Token: 0 - 0x05, // The length of the version - 0x31, 0x2e, 0x30, 0x2e, 0x30 // Version: 1.0.0 - ]) + onComplete(callback) { + this.#completeHandler = callback + } + + notifyComplete() { + if (this.#completeHandler) { + this.#completeHandler() } + } } -class ConfigureWifiCommand extends Command { - #ssid - #password +class Form { + #activeClassName = 'form--active' + + constructor(id) { + this.form = document.getElementById(id) + if (this.form === null) { + throw new Error(`Form with id ${id} does not exist.`) + } + } + + display() { + this.form.classList.add(this.#activeClassName) - constructor(ssid, password) { - super() - this.#ssid = ssid - this.#password = password + if (typeof this.onDisplay === 'function') { + this.onDisplay() } + } + + hide() { + this.form.classList.remove(this.#activeClassName) - get commandId() { - return 0x15 + if (typeof this.onHide === 'function') { + this.onHide() } + } +} + +class ProgressibleForm extends Form { + #nextForm = null - get payload() { - const encoder = new TextEncoder() - const ssid = encoder.encode(this.#ssid) - const password = encoder.encode(this.#password) + nextTo(form) { + this.#nextForm = form + return this + } - return new Uint8Array([ - ssid.length, ...ssid, - password.length, ...password - ]) + transitToNextForm() { + if (this.#nextForm === null) { + return } + + this.hide() + this.#nextForm.display() + } +} + +class WelcomeForm extends ProgressibleForm { + constructor(id) { + super(id) + this.form.addEventListener('submit', this.handleSubmit.bind(this)) + } + + handleSubmit(event) { + event.preventDefault() + this.transitToNextForm() + } } -class RequestIdentityCommand extends Command { - get commandId() { - return 0x16 +class WifiCredentialsForm extends ProgressibleForm { + #alert + #submitCallback = null + + constructor(id) { + super(id) + this.#alert = new Alert(this.form.querySelector('[data-alert]')) + this.form.addEventListener('submit', this.handleSubmit.bind(this)) + } + + handleSubmit(event) { + event.preventDefault() + const { elements } = event.target + try { + const [ssid, password] = this.validate(elements.ssid.value, elements.password.value) + if (this.#submitCallback) { + this.#submitCallback({ ssid, password }) + } + this.transitToNextForm() + } catch (error) { + this.#alert.show(error.message) + } + } + + /** + * Validate with the IEEE 802.11 standard. + * + * @param {string} ssid - The Wi-Fi name + * @param {string} password - The Password (WPA/WPA2-PSK) + */ + validate(ssid, password) { + if (ssid === '' ) { + throw new Error('SSID cannot be empty.') + } + + // The SSID is up to 32 characters + if (ssid.length > 32) { + throw new Error('SSID cannot be longer than 32 characters.') } - get payload() { - return new Uint8Array([ - // - ]) + if (password === '' ) { + throw new Error('Password cannot be empty.') } + + // The password is between 8 and 63 characters + if (password.length < 8 || password.length > 63) { + throw new Error('Password must be between 8 and 63 characters long.') + } + + return [ssid, password] + } + + onSubmit(callback) { + this.#submitCallback = callback + return this + } } -async function delay(ms) { - return new Promise(resolve => setTimeout(resolve, ms)) +class PairingActivationForm extends ProgressibleForm { + constructor(id) { + super(id) + this.form.addEventListener('submit', this.handleSubmit.bind(this)) + } + + handleSubmit(event) { + event.preventDefault() + this.transitToNextForm() + } } -async function connect() { - const ssid = document.getElementById('ssid') - const password = document.getElementById('password') +class CommunicationForm extends Form { + #handler + #messages = null - if (ssid.value === '' || password.value === '') { - return + /** @type {Countdown} */ + #countdown + + /** @type {HTMLElement|null} */ + #description + + /** @type {string} */ + #descriptionText + + /** @type {Progress} */ + #progress + + #handshakeCommand + #wifiCredentialsCommand + #registerCommand + + #successForm = null + #failureForm = null + + #retryMessage = null + #retryMessageClassName = 'retry-message' + #retryMessageShownClassName = 'retry-message--shown' + + #retryLink = null + #retryLinkClassName = `retry-link` + + /** + * The callback handles the registered device. + * + * @type {CallableFunction|null} + */ + #pairHandler = null + + /** + * @param {string} id - The ID of the form. + * @param {BluetoothHandler} handler - The Bluetooth handler to manage the connection. + */ + constructor(id, handler) { + super(id) + this.#handler = handler + this.#handler.onNotification((event) => { + this.#messages.handle(event.target.value) + }) + this.#messages = new IncomingMessageHandler() + this.#messages.onMessage(this.handleMessage.bind(this)) + this.#setupCounter() + this.#setupProgress() + this.#handshakeCommand = new HandshakeCommand() + this.#wifiCredentialsCommand = new ConfigureWifiCommand('', '') + this.#registerCommand = new RegisterCommand() + this.#retryMessage = this.form.querySelector(`.${this.#retryMessageClassName}`) + if (this.#retryMessage) { + this.#retryLink = this.form.querySelector(`.${this.#retryLinkClassName}`) + this.#retryLink.addEventListener('click', () => { + this.hideRetryOption() + this.startPairing() + }) } + } + + onDisplay() { + this.startPairing() + } + + #setupCounter() { + this.#description = this.form.querySelector('.form__description') + this.#descriptionText = this.#description ? this.#description.textContent : '' + this.#countdown = new Countdown(this.#description, 30) + this.#countdown.onComplete(() => { + this.#progress.clear() + this.disconnectIfNeeded() + this.transitToFailureResultForm() + }) + this.#countdown.onStop(() => { + this.#description.textContent = this.#descriptionText + }) + } + + #setupProgress() { + const el = this.form.querySelector('[data-slot="progress"]') + this.#progress = new Progress(el, [ + { id: 'handshake', name: 'Say a hello to the machine' }, + { id: 'wifi', name: 'Send Wi-Fi credentials' }, + { id: 'register', name: 'Register the device' } + ]) + } + + async startPairing() { + try { + await this.connect() + } catch { + this.showRetryOption() + } + } + + async connect() { + await this.#handler.connect() + + this.#countdown.start() + this.#progress.render() + + this.#progress.markAsCurrent('handshake') + await this.#handler.dispatch(this.#handshakeCommand) + } + + async disconnectIfNeeded() { + await this.#handler.disconnect() + } + + /** + * @param {CompleteMessage} message + */ + handleMessage(message) { + switch (message.commandId) { + case this.#handshakeCommand.commandId: + this.handleHandshakeMessage(message) + break + case this.#wifiCredentialsCommand.commandId: + this.handleWifiCredentialsMessage(message) + break + case this.#registerCommand.commandId: + this.handleRegisterMessage(message) + break + default: + console.warn(`Unknown command ID: ${message.commandId}`) + break + } + } + + /** + * @param {CompleteMessage} message + */ + handleHandshakeMessage(message) { + this.#progress.markAsComplete('handshake') + this.#progress.markAsCurrent('wifi') + this.#handler.dispatch(this.#wifiCredentialsCommand) + } - const device = Device.airmxPro() - const wifiCredentials = { ssid: ssid.value, password: password.value } - await connectToDevice(device, wifiCredentials) + /** + * @param {CompleteMessage} message + */ + handleWifiCredentialsMessage(message) { + this.#progress.markAsComplete('wifi') + this.#progress.markAsCurrent('register') + this.#handler.dispatch(this.#registerCommand) + } + + /** + * @param {CompleteMessage} message + */ + handleRegisterMessage(message) { + this.#countdown.stop() + this.#progress.markAsComplete('register') + this.#progress.clear() + this.disconnectIfNeeded() + + if (this.#pairHandler) { + const length = message.payload.getUint8(0) + if (length === 4) { + const deviceId = message.payload.getUint32(1) + this.#pairHandler(deviceId) + } + } + + this.transitToSuccessResultForm() + } + + showRetryOption() { + if (this.#retryMessage === null) { + return + } + + this.#retryMessage.classList.add(this.#retryMessageShownClassName) + } + + hideRetryOption() { + if (this.#retryMessage === null) { + return + } + + this.#retryMessage.classList.remove(this.#retryMessageShownClassName) + } + + succeedTo(form) { + this.#successForm = form + return this + } + + failTo(form) { + this.#failureForm = form + return this + } + + wifiCredentialsUsing(credentials) { + this.#wifiCredentialsCommand = new ConfigureWifiCommand(credentials.ssid, credentials.password) + return this + } + + /** + * @param {CallableFunction} handler + */ + onPair(handler) { + this.#pairHandler = handler + return this + } + + transitToSuccessResultForm() { + this.hide() + this.#successForm?.display() + } + + transitToFailureResultForm() { + this.hide() + this.#failureForm?.display() + } } -async function connectToDevice(device, wifiCredentials) { - const bluetoothDevice = await navigator.bluetooth.requestDevice({ - filters: [{ name: device.name }], - optionalServices: [device.primaryServiceUuid] +class SuccessForm extends Form { + /** @type {HTMLElement} */ + #inputGroup + + /** @type {HTMLElement} */ + #input + + /** @type {HTMLElement} */ + #button + + #alert + + /** @type {string|null} */ + #deviceId = null + + /** @type {string|null} */ + #key = null + + constructor(id) { + super(id) + this.#inputGroup = this.form.querySelector('[data-key]') + if (this.#inputGroup === null) { + throw new Error('Could not find the input group for device key.') + } + this.#alert = new Alert(this.form.querySelector('[data-alert]')) + this.#renderInput() + } + + #renderInput() { + this.#input = document.createElement('input') + this.#input.classList.add('input') + this.#input.setAttribute('type', 'text') + this.#input.setAttribute('name', 'key') + this.#input.setAttribute('value', 'Loading...') + this.#input.setAttribute('readonly', '') + this.#inputGroup.appendChild(this.#input) + } + + #renderButton() { + this.#button = document.createElement('button') + this.#button.classList.add('button') + this.#button.setAttribute('type', 'button') + this.#button.addEventListener('click', this.#handleButtonClick.bind(this)) + this.#button.innerText = 'Copy' + this.#inputGroup.appendChild(this.#button) + } + + onDisplay() { + if (this.#key === null) { + this.#initializeDeviceKey() + } + } + + async #initializeDeviceKey() { + try { + this.#key = await this.#fetchDeviceKey() + + if (this.#key === null) { + this.#handleDeviceKeyRetrievalFailure() + return + } + + this.#input.value = this.#key + this.#renderButton() + } catch { + this.#handleDeviceKeyRetrievalFailure() + } + } + + async #fetchDeviceKey() { + if (this.#deviceId === null) { + return null + } + + // We are using HTTP because the domain name is remapped to our local + // mock server, and the communication between the device and our mock + // server utilizes the HTTP protocol as well. + const response = await fetch(`http://i.airmx.cn/exchange?device=${this.#deviceId}`, { + signal: AbortSignal.timeout(3000) }) - const server = await bluetoothDevice.gatt.connect() - const service = await server.getPrimaryService(device.primaryServiceUuid) + if (! response.ok) { + throw new Error('Could not retrieve the device key.') + } + + const data = await response.json() + return data.key + } + + async #handleButtonClick() { + if (! this.#input) { + return + } + + try { + await navigator.clipboard.writeText(this.#input.value) + this.#alert.show('Copied to the clipboard.') + } catch { + this.#alert.show('Unable to copy to the clipboard because of permission issues.') + } + } + + #handleDeviceKeyRetrievalFailure() { + this.#input.value = 'Could not retrieve the device key.' + } - const writeCharacteristic = await service.getCharacteristic(device.writeCharacteristicUuid) - const notifyCharacteristic = await service.getCharacteristic(device.notifyCharacteristicUuid) + /** + * @param {number} deviceId + */ + deviceIdUsing(deviceId) { + this.#deviceId = deviceId + return this + } +} - await notifyCharacteristic.startNotifications() - notifyCharacteristic.addEventListener('characteristicvaluechanged', handleDeviceResponse) +class FailureForm extends ProgressibleForm { + constructor(id) { + super(id) + this.form.addEventListener('submit', this.handleSubmit.bind(this)) + } - const dispatcher = new Dispatcher(writeCharacteristic) - await dispatcher.dispatch(new HandshakeCommand()) - await dispatcher.dispatch(new ConfigureWifiCommand(wifiCredentials.ssid, wifiCredentials.password)) - await dispatcher.dispatch(new RequestIdentityCommand()) + handleSubmit(event) { + event.preventDefault() + this.transitToNextForm() + } } -function handleDeviceResponse(event) { - const value = event.target.value - const receivedBytes = [] - for (let i = 0; i < value.byteLength; i++) { - receivedBytes.push(value.getUint8(i).toString(16).padStart(2, '0')) +class Alert { + /** @type {HTMLElement} */ + #el + + /** + * @param {HTMLElement|null} el - The HTML element to mount the alert component. + */ + constructor(el) { + if (el === null) { + throw new Error('The HTML element to mount the alert component does not exist.') + } + this.#el = el + } + + /** + * @param {string} message + */ + show(message) { + if (! this.#el.classList.contains('help-text')) { + this.#el.classList.add('help-text') } - console.log(`Received data from device: ${receivedBytes.join(' ')}`) + this.#el.textContent = message + } } -function supportBluetoothApi() { - return 'bluetooth' in navigator +class Progress { + #el + #steps + + /** + * @param {HTMLElement|null} el - The HTML element to display the progress. + * @param {{ id: string, name: string }[]} steps - The progress steps. + */ + constructor(el, steps) { + this.#el = el + this.#steps = steps + if (this.#el === null) { + throw new Error('The HTML element could not be found to mount the progress.') + } + } + + render() { + if (! this.#el.classList.contains('progress')) { + this.#el.classList.add('progress') + } + + for (const step of this.#steps) { + const el = document.createElement('li') + el.innerText = step.name + el.classList.add('progress__item') + el.dataset.progress = step.id + this.#el.appendChild(el) + } + } + + clear() { + this.#el.innerHTML = '' + } + + /** + * @param {string} step - The step ID. + */ + markAsCurrent(step) { + this.markAsDefault(step) + + const el = this.#stepElement(step) + el.dataset.current = '' + } + + /** + * @param {string} step - The step ID. + */ + markAsComplete(step) { + this.markAsDefault(step) + + const el = this.#stepElement(step) + el.dataset.complete = '' + } + + /** + * @param {string} step - The step ID. + */ + markAsDefault(step) { + const el = this.#stepElement(step) + if ('current' in el.dataset) { + delete el.dataset.current + } + if ('complete' in el.dataset) { + delete el.dataset.complete + } + } + + /** + * @param {string} id - The step ID. + */ + #stepElement(id) { + const el = this.#el.querySelector(`[data-progress="${id}"]`) + if (! el) { + throw new Error(`Progress step "${step}" does not exist.`) + } + return el + } } -if (! supportBluetoothApi()) { - const unsupportedMessage = document.getElementById('unsupported-message') - unsupportedMessage.style.display = 'block' +class Application { + static supportBluetoothApi() { + return 'bluetooth' in navigator + } + + static run() { + if (! this.supportBluetoothApi()) { + const unsupportedForm = new Form('form-unsupported') + unsupportedForm.display() + return + } + + const successForm = new SuccessForm('form-result-success') + const failureForm = new FailureForm('form-result-failure') + + const handler = new BluetoothHandler(Device.airmxPro()) + const communicationForm = new CommunicationForm('form-communication', handler) + .succeedTo(successForm) + .failTo(failureForm) + .onPair((deviceId) => { + successForm.deviceIdUsing(deviceId) + }) + + const pairingActivationForm = new PairingActivationForm('form-pairing-activation') + .nextTo(communicationForm) - const main = document.querySelector('main') - main.style.display = 'none' + const wifiCredentialsForm = new WifiCredentialsForm('form-wifi-credentials') + .nextTo(pairingActivationForm) + .onSubmit((credentials) => { + communicationForm.wifiCredentialsUsing(credentials) + }) + + // If the pairing process fails, we will redirect the user to the Wi-Fi + // credentials form so that they can retry with different credentials. + failureForm.nextTo(wifiCredentialsForm) + + // Now that everything is set up, it's time to show the user + // the welcome screen. + new WelcomeForm('form-welcome') + .nextTo(wifiCredentialsForm) + .display() + } } + +Application.run() |