Big page refactor

webapp/src/space.ts

@@ -0,0 +1,59 @@
+import { PageMeta } from "./types";
+
+export interface Space {
+  listPages(): Promise<PageMeta[]>;
+  readPage(name: string): Promise<{ text: string; meta: PageMeta }>;
+  writePage(name: string, text: string): Promise<PageMeta>;
+  getPageMeta(name: string): Promise<PageMeta>;
+}
+
+export class HttpRemoteSpace implements Space {
+  url: string;
+  constructor(url: string) {
+    this.url = url;
+  }
+  async listPages(): Promise<PageMeta[]> {
+    let req = await fetch(this.url, {
+      method: "GET",
+    });
+
+    return (await req.json()).map((meta: any) => ({
+      name: meta.name,
+      lastModified: new Date(meta.lastModified),
+    }));
+  }
+  async readPage(name: string): Promise<{ text: string; meta: PageMeta }> {
+    let req = await fetch(`${this.url}/${name}`, {
+      method: "GET",
+    });
+    return {
+      text: await req.text(),
+      meta: {
+        lastModified: new Date(+req.headers.get("Last-Modified")!),
+        name: name,
+      },
+    };
+  }
+  async writePage(name: string, text: string): Promise<PageMeta> {
+    let req = await fetch(`${this.url}/${name}`, {
+      method: "PUT",
+      body: text,
+    });
+    // 201 (Created) means a new page was created
+    return {
+      lastModified: new Date(+req.headers.get("Last-Modified")!),
+      name: name,
+      created: req.status === 201,
+    };
+  }
+
+  async getPageMeta(name: string): Promise<PageMeta> {
+    let req = await fetch(`${this.url}/${name}`, {
+      method: "OPTIONS",
+    });
+    return {
+      name: name,
+      lastModified: new Date(+req.headers.get("Last-Modified")!),
+    };
+  }
+}