Initial work on #190

theme/moth.mjs

@@ -0,0 +1,83 @@
+class Server {
+    constructor(baseUrl) {
+        this.baseUrl = new URL(baseUrl)
+        this.teamId = null
+    }
+
+    /**
+     * Fetch a MOTH resource.
+     * 
+     * This is just a convenience wrapper to always send teamId.
+     * If body is set, POST will be used instead of GET
+     * 
+     * @param {String} path Path to API endpoint
+     * @param {Object} body Key/Values to send in POST data
+     * @returns {Promise} Response
+     */
+    fetch(path, body) {
+        let url = new URL(path, this.baseUrl)
+        if (this.teamId & (!(body && body.id))) {
+            url.searchParams.set("id", this.teamId)
+        }
+        return fetch(url, {
+            method: body?"POST":"GET",
+            body,
+        })
+    }
+
+    /**
+     * Send a request to a JSend API endpoint.
+     * 
+     * @param {String} path Path to API endpoint
+     * @param {Object} args Key/Values to send in POST
+     * @returns JSend Data
+     */
+    async postJSend(path, args) {
+        let resp = await this.fetch(path, args)
+        if (!resp.ok) {
+            throw new Error(resp.statusText)
+        }
+        let obj = await resp.json()
+        switch (obj.status) {
+            case "success":
+                return obj.data
+            case "failure":
+                throw new Error(obj.data.description || obj.data.short || obj.data)
+            case "error":
+                throw new Error(obj.message)
+            default:
+                throw new Error(`Unknown JSend status: ${obj.status}`)
+        }
+    }
+
+    /**
+     * Register a team name with a team ID.
+     * 
+     * This is similar to, but not exactly the same as, logging in.
+     * See MOTH documentation for details.
+     * 
+     * @param {String} teamId 
+     * @param {String} teamName 
+     * @returns {String} Success message from server
+     */
+    async Register(teamId, teamName) {
+        let data = await postJSend("/login", {id: teamId, name: teamName})
+        this.teamId = teamId
+        this.teamName = teamName
+        return data.description || data.short
+    }
+
+    /**
+     * Fetch current contest status.
+     * 
+     * @returns {Object} Contest status
+     */
+    async Status() {
+        let data = await this.postJSend("/status")
+        return data
+    }
+}
+
+export {
+    Server
+}