diff options
Diffstat (limited to '')
| -rw-r--r-- | lib/api.js | 67 | ||||
| -rw-r--r-- | lib/systems.js | 36 |
2 files changed, 67 insertions, 36 deletions
@@ -5,32 +5,28 @@ let busy = false; // lets us know if we are already sending api requests or not. let headers = undefined; // a file scope variable so that we only evaluate these once. let queue = new PriorityQueue(); // a priority queue to hold api calls we want to send, allows for throttling. -// chain takes an array of actions as argument. For each one it sets the `next` property. -// example action: { -// action: function to call, -// next: optional nested action object, would get overriden by this function, except for the last action, -// ... other attributes as required by the action function (for example ship or waypoing symbol...) -// } -export function chain(actions) { - for(let i=actions.length-1;i>0;--i) { - actions[i-1].next = actions[i]; - } - actions[0].action(actions[0]); -} - -// send takes a data object as argument -// example data: { +// send takes a request object as argument and an optional context ctx +// example request: { // endpoint: the url endpoint to call, // method: HTTP method for `fetch` call, defaults to 'GET', -// next: optional nested action object, as specified above with the chain function, // payload: optional json object that will be send along with the request, +// priority: optional priority value (defaults to 10, lower than 10 means the message will be sent faster) // } -export function send(data) { - if (!busy) { - send_this(data); - } else { - queue.enqueue(data, data.priority ? data.priority : 10); - } +export function send(request, ctx) { + return new Promise((resolve, reject) => { + let data = { + ctx: ctx, + reject: reject, + request: request, + resolve: resolve, + }; + if (!busy) { + busy = true; + send_this(data); + } else { + queue.enqueue(data, request.priority ? request.priority : 10); + } + }); } function send_next() { @@ -41,6 +37,7 @@ function send_next() { } } +// send_this take a data object as argument built in the send function above function send_this(data) { if (headers === undefined) { const token = getToken(); @@ -55,22 +52,20 @@ function send_this(data) { let options = { headers: headers, }; - if (data.method !== undefined) { - options['method'] = data.method; + if (data.request.method !== undefined) { + options['method'] = data.request.method; } - if (data.payload !== undefined) { - options['body'] = JSON.stringify(data.payload); + if (data.request.payload !== undefined) { + options['body'] = JSON.stringify(data.request.payload); } - busy = true; - fetch(`https://api.spacetraders.io/v2${data.endpoint}`, options) + fetch(`https://api.spacetraders.io/v2${data.request.endpoint}`, options) .then(response => response.json()) - .then(response => { - if (data.next !== undefined) { // if we have a next action, call it now - data.next.action(data.next, response); - } else { // otherwise use this debug action - console.log(JSON.stringify(response, null, 2)); - } - }) - .catch(err => console.error(err)); + .then(response => data.resolve(response)) + .catch(err => data.reject(err)); setTimeout(send_next, 500); } + +export function debugLog(ctx) { + console.log(`--- ${Date()} -----------------------------------------------------------------------------`); + console.log(JSON.stringify(ctx, null, 2)); +} diff --git a/lib/systems.js b/lib/systems.js new file mode 100644 index 0000000..ad354e4 --- /dev/null +++ b/lib/systems.js @@ -0,0 +1,36 @@ +import * as api from './api.js'; +import * as db from '../database/systems.js'; + +// Retrieves a list of waypoints that have a specific ctx.trait like a SHIPYARD or a MARKETPLACE in the system ctx.symbol +export async function trait(ctx) { + const s = await getSystem(ctx); + return s.filter(s => s.traits.some(t => t.symbol === ctx.trait)); +} + +// Retrieves a list of waypoints that have a specific ctx.type like ASTEROID_FIELD in the system ctx.symbol +export async function type(ctx, response) { + const s = await getSystem(ctx); + return s.filter(s => s.type === ctx.type); +} + +// Retrieves the system's information for ctx.symbol and cache it in the database +async function getSystem(ctx) { + let s = db.getSystem(ctx.symbol); + if (s === null) { + const response = await api.send({endpoint: `/systems/${ctx.symbol}/waypoints?limit=20&page=1`}); + if (response.error !== undefined) { + switch(response.error.code) { + case 404: + throw `Error retrieving waypoints for system ${ctx.symbol}: ${response.error.message}`; + default: // yet unhandled error + throw response; + } + } + if (response.meta !== undefined && response.meta.total > response.meta.limit) { + throw `Error retrieving waypoints for system ${ctx.symbol}: Pagination is not implemented yet!`; + } + s = response.data; + db.setSystem(ctx.symbol, s); + } + return s; +} |