From 4672a0846297cea8184c2c3f52b4dc05f9c79fd2 Mon Sep 17 00:00:00 2001
From: Ilion Beyst <ilion.beyst@gmail.com>
Date: Sat, 6 Aug 2022 15:23:02 +0200
Subject: introduce ApiClient

---
 web/pw-server/src/lib/api_client.ts             | 70 +++++++++++++++++++++++++
 web/pw-server/src/lib/utils.ts                  | 37 +++----------
 web/pw-server/src/routes/bots/[bot_name].svelte | 41 ++++++---------
 3 files changed, 92 insertions(+), 56 deletions(-)
 create mode 100644 web/pw-server/src/lib/api_client.ts

diff --git a/web/pw-server/src/lib/api_client.ts b/web/pw-server/src/lib/api_client.ts
new file mode 100644
index 0000000..93135ab
--- /dev/null
+++ b/web/pw-server/src/lib/api_client.ts
@@ -0,0 +1,70 @@
+import { get_session_token } from "./auth";
+
+export type FetchFn = (input: RequestInfo, init?: RequestInit) => Promise<Response>;
+
+export class ApiError extends Error {
+  constructor(public status: number, message?: string) {
+    super(message);
+  }
+}
+
+export class ApiClient {
+  private fetch_fn: FetchFn;
+  private sessionToken?: string;
+
+  constructor(fetch_fn?: FetchFn) {
+    if (fetch_fn) {
+      this.fetch_fn = fetch_fn;
+    } else {
+      this.fetch_fn = fetch;
+    }
+
+    // TODO: maybe it is cleaner to pass this as a parameter
+    this.sessionToken = get_session_token();
+  }
+
+  async get(url: string, params?: Record<string, string>): Promise<any> {
+    const headers = { "Content-Type": "application/json" };
+
+    if (this.sessionToken) {
+      headers["Authorization"] = `Bearer ${this.sessionToken}`;
+    }
+
+    if (params) {
+      let searchParams = new URLSearchParams(params);
+      url = `${url}?${searchParams}`;
+    }
+
+    const response = await this.fetch_fn(url, {
+      method: "GET",
+      headers,
+    });
+
+    return await this.getJsonResponse(response);
+  }
+
+  async post(url: string, data: any): Promise<any> {
+    const headers = { "Content-Type": "application/json" };
+
+    const token = get_session_token();
+    if (token) {
+      headers["Authorization"] = `Bearer ${token}`;
+    }
+
+    const response = await this.fetch_fn(url, {
+      method: "POST",
+      headers,
+      body: JSON.stringify(data),
+    });
+
+    return await this.getJsonResponse(response);
+  }
+
+  private async getJsonResponse(response: Response): Promise<any> {
+    if (response.ok) {
+      return await response.json();
+    } else {
+      throw new ApiError(response.status, response.statusText);
+    }
+  }
+}
diff --git a/web/pw-server/src/lib/utils.ts b/web/pw-server/src/lib/utils.ts
index 155d952..ab1faa5 100644
--- a/web/pw-server/src/lib/utils.ts
+++ b/web/pw-server/src/lib/utils.ts
@@ -1,4 +1,4 @@
-import { get_session_token } from "./auth";
+import { ApiClient, FetchFn } from "./api_client";
 
 export function debounce(func: Function, timeout: number = 300) {
   let timer: ReturnType<typeof setTimeout>;
@@ -10,35 +10,12 @@ export function debounce(func: Function, timeout: number = 300) {
   };
 }
 
-export async function get(url: string, fetch_fn: Function = fetch) {
-  const headers = { "Content-Type": "application/json" };
-
-  const token = get_session_token();
-  if (token) {
-    headers["Authorization"] = `Bearer ${token}`;
-  }
-
-  const response = await fetch_fn(url, {
-    method: "GET",
-    headers,
-  });
-
-  return JSON.parse(response);
+export async function get(url: string, params?: Record<string, string>, fetch_fn: FetchFn = fetch) {
+  const client = new ApiClient(fetch_fn);
+  return await client.get(url, params);
 }
 
-export async function post(url: string, data: any, fetch_fn: Function = fetch) {
-  const headers = { "Content-Type": "application/json" };
-
-  const token = get_session_token();
-  if (token) {
-    headers["Authorization"] = `Bearer ${token}`;
-  }
-
-  const response = await fetch_fn(url, {
-    method: "POST",
-    headers,
-    body: JSON.stringify(data),
-  });
-
-  return JSON.parse(response);
+export async function post(url: string, data: any, fetch_fn: FetchFn = fetch) {
+  const client = new ApiClient(fetch_fn);
+  return await client.post(url, data);
 }
diff --git a/web/pw-server/src/routes/bots/[bot_name].svelte b/web/pw-server/src/routes/bots/[bot_name].svelte
index 48aef21..d110e4b 100644
--- a/web/pw-server/src/routes/bots/[bot_name].svelte
+++ b/web/pw-server/src/routes/bots/[bot_name].svelte
@@ -1,27 +1,16 @@
 <script lang="ts" context="module">
-  import { get_session_token } from "$lib/auth";
+  import { ApiClient } from "$lib/api_client";
 
   export async function load({ params, fetch }) {
-    const token = get_session_token();
-    const res = await fetch(`/api/bots/${params["bot_name"]}`, {
-      headers: {
-        "Content-Type": "application/json",
-        Authorization: `Bearer ${token}`,
-      },
-    });
-
-    const matches_res = await fetch(`/api/matches?bot=${params["bot_name"]}`, {
-      headers: {
-        "Content-Type": "application/json",
-        Authorization: `Bearer ${token}`,
-      },
-    });
-
-
-    if (res.ok && matches_res.ok) {
-      const { bot, owner, versions } = await res.json();
-      const matches = await matches_res.json();
-      // sort most recent first
+    const apiClient = new ApiClient(fetch);
+
+    try {
+      const [botData, matches] = await Promise.all([
+        apiClient.get(`/api/bots/${params["bot_name"]}`),
+        apiClient.get("/api/matches", { bot: params["bot_name"] }),
+      ]);
+
+      const { bot, owner, versions } = botData;
       versions.sort((a: string, b: string) =>
         dayjs(a["created_at"]).isAfter(b["created_at"]) ? -1 : 1
       );
@@ -33,12 +22,12 @@
           matches,
         },
       };
+    } catch (error) {
+      return {
+        status: error.status,
+        error: error,
+      };
     }
-
-    return {
-      status: res.status,
-      error: new Error("Could not find bot"),
-    };
   }
 </script>
 
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