implemented homework

src/liftclient.ts

@@ -0,0 +1,91 @@
+import {Lift, LiftFilterCriteron, SmallLiftRepresentation} from "./shared.ts";
+import {h} from "https://esm.sh/stable/preact@10.8.1/denonext/preact.mjs";
+
+class LiftClient{
+
+    private readonly host: string;
+
+    constructor(host: string) {
+        this.host = host;
+    }
+
+    async listElevators(): Promise<SmallLiftRepresentation[]> {
+        const resp = await fetch(`${this.host}/api/v1/lifts`);
+        const ret = await resp.json();
+        return ret.lifts as SmallLiftRepresentation[] ;
+    }
+
+    async filterLifts(criteron: LiftFilterCriteron):  Promise<SmallLiftRepresentation[]> {
+        const searchParams =  new URLSearchParams(criteron);
+        const resp = await fetch(`${this.host}/api/v1/lifts?${searchParams}`);
+        const ret = await resp.json();
+        return ret.lifts as SmallLiftRepresentation[];
+    }
+
+    async getLiftById(id: number): Promise<Lift | null> {
+        const resp = await fetch(`${this.host}/api/v1/lifts/${id}`);
+        if(resp.status === 404){
+            return null;
+        }
+        return (await resp.json()) as Lift;
+    }
+
+    private async sendPost(url: string, payload: unknown): Promise<Response>{
+        return  await fetch(url, {
+            method: "POST",
+            headers: {
+                "Content-Type": "application/json",
+            },
+            body: JSON.stringify(payload),
+        });
+    }
+
+    async moveLift(liftId: number, newLevel: number): Promise<boolean> {
+        const payload = {
+            type: 'lift-move',
+            level: newLevel,
+        }
+        const resp = await this.sendPost(`${this.host}/api/v1/lifts/${liftId}`, payload);
+        return 199 < resp.status && resp.status < 300;
+    }
+
+    async openLiftDoor(liftId: number): Promise<boolean> {
+        const lift = await this.getLiftById(liftId);
+        if(lift == null){
+            return false;
+        }
+        const payload = {
+            type: 'door-open',
+            level: lift.level,
+        }
+        const resp = await this.sendPost(`${this.host}/api/v1/lifts/${liftId}`, payload);
+        return 199 < resp.status && resp.status < 300;
+    }
+
+    async setDestination(liftId: number, newDestination: number): Promise<boolean> {
+        const payload = {
+            type: 'add-destination',
+            destination: newDestination,
+        }
+        const resp = await this.sendPost(`${this.host}/api/v1/lifts/${liftId}`, payload);
+        return 199 < resp.status && resp.status < 300;
+    }
+}
+
+async function experiment(): Promise<void>{
+    const client = new LiftClient("http://localhost:3000");
+    console.log(await client.getLiftById(2));
+    console.log(await client.setDestination(2, -1))
+    console.log(await client.setDestination(2, 11))
+    console.log(await client.setDestination(2, 16))
+    console.log(await client.setDestination(2, 14))
+    console.log(await client.setDestination(2, -1))
+
+
+    console.log(await client.getLiftById(2));
+    console.log(await client.openLiftDoor(2))
+    console.log(await client.getLiftById(2));
+}
+
+
+await experiment()