89 lines
2 KiB
JavaScript
89 lines
2 KiB
JavaScript
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/**
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* A command string.
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* @typedef {('forward' | 'backward' | 'left' | 'right' | 'stop')} Command
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*/
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/**
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* Send command to the robot.
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*
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* @param {Command} command Command to send.
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* @param {number} value Value of the command if needed.
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*
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* @returns {Promise<void>}
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*/
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export async function sendCommand(command, value) {
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const endpoint = getEndpoint()
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const url = new URL(`/get?command=${command}&value=${value}`, endpoint)
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const response = await fetch(url)
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const text = await response.text()
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console.log(text)
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}
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/**
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* Get robot endpoint address.
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*
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* @returns {string}
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*/
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export function getEndpoint() {
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const endpoint = sessionStorage.getItem('robot-endpoint')
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if (endpoint === null) {
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alert("Aucune adresse IP n'a été renseignée !")
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throw new Error('no given ip address')
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}
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return endpoint
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}
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/**
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* Set robot endpoint address.
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*
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* @param {string} ip Robot ip.
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*
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* @returns {void}
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*/
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export function setEndpoint(ip) {
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sessionStorage.setItem('robot-endpoint', ip)
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}
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/**
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* Test connection to endpoint.
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*
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* @param {string} endpoint Endpoint to test for.
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*
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* @returns {void}
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* @throws {Error} Endpoint unreachable.
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*/
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export async function testEndpoint(endpoint) {
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try {
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const response = await fetch(endpoint)
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if (response.ok) return
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} catch (cause) {
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alert(`Impossible de joindre l'adresse "${endpoint}"`)
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throw new Error(`unable to connect to robot at ${endpoint}`, {
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cause,
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})
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}
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}
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/**
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* Assign a command to an input.
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* Do negative command if value < 0 else do positive command.
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*
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* @param {Command} negativeCommand Command if value < 0.
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* @param {Command} positiveCommand Command if value >= 0.
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* @param {event} event Event of the input.
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*
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* @returns {Promise<void>}
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*/
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export function assignCommands(negativeCommand, positiveCommand, event) {
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if (event.target === null) return
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/** @type {HTMLInputElement} */
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const target = event.target
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const value = target.valueAsNumber
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if (value < 0) {
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return sendCommand(negativeCommand, Math.abs(value))
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}
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return sendCommand(positiveCommand, value)
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}
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