initial commit

src/lib/backend.ts

@@ -0,0 +1,104 @@
+
+
+export type UserEntry = {
+    id: string,
+    username: string,
+    display_name?: string,
+    biography?: string,
+    joined_at?: string,
+    age: number, // actually not just that
+    badges?: string[]
+    type?: 'user',
+    karma?: number
+};
+
+export type GuildEntry = {
+    type?: 'guild',
+    id: string,
+    name: string,
+    display_name?: string,
+    description?: string,
+    created_at?: string 
+};
+
+export type PostEntry = {
+    id: string,
+    url: string,
+    title: string,
+    created_at: string,
+    author?: UserEntry | null,
+    content?: string | null,
+    to: UserEntry | GuildEntry 
+};
+
+export type ServerHealth = {
+    version: string,
+    name: string,
+    post_count: number,
+    user_count: number,
+    me: string | null,
+    csrf_token?: string
+};
+
+
+export class Backend {
+    static ENDPOINT_BASE = '/v1';
+
+    constructor () {
+    }
+
+    async fetch(url: string, options?: RequestInit) {
+        console.info(`fetch ${Backend.ENDPOINT_BASE}/${encodeURIComponent(url)}`)
+        return await fetch(`${Backend.ENDPOINT_BASE}/${encodeURIComponent(url)}`, options);
+    }
+
+    withEvent(event: any) {
+        return new EventBackend(event);
+    }
+}
+
+class EventBackend extends Backend {
+    event: any;
+
+    constructor (event: any) {
+        super();
+        this.event = event;
+    }
+
+    async oath (): Promise<CsrfEventBackend> {
+        const resp = await this.fetch("oath");
+        if (resp.status !== 200) {
+            throw new Error();
+        }
+        const respJ = await resp.json();
+        const { csrfToken } = respJ;
+        return new CsrfEventBackend(this.event, csrfToken);
+    }
+
+    async fetch(url: string, options?: RequestInit): Promise<Response> {
+        return await this.event.fetch(`${Backend.ENDPOINT_BASE}/${url.replace(/^\/+/, '')}`, options);
+    }
+}
+
+class CsrfEventBackend extends EventBackend {
+    csrfToken: string;
+
+    constructor(event:EventBackend, csrfToken: string) {
+        super(event);
+        this.csrfToken = csrfToken;
+    }
+
+    async submitJson(url: string, data: object) {
+        return await this.fetch(url, {
+            method: 'POST',
+            body: JSON.stringify(data),
+            headers: {
+                'content-type': 'application/json',
+                'x-csrftoken': this.csrfToken
+            }
+        });
+    }
+}
+
+export const backend = new Backend();
+