fix: wire production Amap adapter

apps/api/src/amap-adapter.ts

@@ -1,5 +1,31 @@
+import { request as httpsRequest } from "node:https";
+
+const amapHostname = "restapi.amap.com" as const;
+const amapMaxResponseBytes = 65_536;
+const amapTimeoutMs = 15_000;
+
+export interface AmapHttpRequest {
+  allowRedirects: false;
+  hostname: typeof amapHostname;
+  maxResponseBytes: number;
+  method: "GET";
+  path: string;
+  protocol: "https:";
+  rejectUnauthorized: true;
+  timeoutMs: number;
+}
+
+type AmapRequester = (request: AmapHttpRequest) => Promise<unknown>;
+
+export class AmapAdapterError extends Error {
+  constructor(readonly code: "amap_adapter_disposed" | "amap_invalid_request" | "amap_invalid_response" | "amap_provider_rejected" | "amap_provider_unavailable" | "amap_redirect_rejected" | "amap_request_timeout" | "amap_response_too_large") {
+    super(code);
+  }
+}
+
 export interface AmapAdapter {
-  reverseGeocode(coordinates: { latitude: number; longitude: number }): Promise<{ formattedValue: string; serviceMode: "mock" }>;
+  dispose?(): void;
+  reverseGeocode(coordinates: { latitude: number; longitude: number }): Promise<{ formattedValue: string; serviceMode: "mock" | "real" }>;
 }
 
 export class MockAmapAdapter implements AmapAdapter {
@@ -13,3 +39,126 @@ export class MockAmapAdapter implements AmapAdapter {
     };
   }
 }
+
+function requestAmapJson(input: AmapHttpRequest) {
+  return new Promise<unknown>((resolve, reject) => {
+    if (input.protocol !== "https:" || input.hostname !== amapHostname || input.allowRedirects || !input.rejectUnauthorized) {
+      reject(new AmapAdapterError("amap_invalid_request"));
+      return;
+    }
+    let settled = false;
+    const finish = (callback: () => void) => {
+      if (settled) return;
+      settled = true;
+      callback();
+    };
+    const request = httpsRequest({
+      headers: { Accept: "application/json" },
+      hostname: input.hostname,
+      method: input.method,
+      path: input.path,
+      port: 443,
+      protocol: input.protocol,
+      rejectUnauthorized: input.rejectUnauthorized,
+      servername: input.hostname,
+    }, (response) => {
+      const statusCode = response.statusCode ?? 0;
+      if (statusCode >= 300 && statusCode < 400) {
+        response.resume();
+        finish(() => reject(new AmapAdapterError("amap_redirect_rejected")));
+        return;
+      }
+      if (statusCode !== 200) {
+        response.resume();
+        finish(() => reject(new AmapAdapterError("amap_provider_unavailable")));
+        return;
+      }
+      const declaredLength = Number(response.headers["content-length"] ?? 0);
+      if (Number.isFinite(declaredLength) && declaredLength > input.maxResponseBytes) {
+        response.destroy();
+        finish(() => reject(new AmapAdapterError("amap_response_too_large")));
+        return;
+      }
+      const chunks: Buffer[] = [];
+      let receivedBytes = 0;
+      response.on("data", (chunk: Buffer | string) => {
+        const bytes = Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk);
+        receivedBytes += bytes.length;
+        if (receivedBytes > input.maxResponseBytes) {
+          response.destroy();
+          finish(() => reject(new AmapAdapterError("amap_response_too_large")));
+          return;
+        }
+        chunks.push(bytes);
+      });
+      response.on("end", () => {
+        finish(() => {
+          try {
+            resolve(JSON.parse(Buffer.concat(chunks).toString("utf8")));
+          } catch {
+            reject(new AmapAdapterError("amap_invalid_response"));
+          } finally {
+            for (const chunk of chunks) chunk.fill(0);
+            chunks.length = 0;
+          }
+        });
+      });
+    });
+    request.setTimeout(input.timeoutMs, () => request.destroy(new AmapAdapterError("amap_request_timeout")));
+    request.on("error", (error) => finish(() => reject(error instanceof AmapAdapterError ? error : new AmapAdapterError("amap_provider_unavailable"))));
+    request.end();
+  });
+}
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return Boolean(value) && typeof value === "object" && !Array.isArray(value);
+}
+
+export class RealAmapAdapter implements AmapAdapter {
+  private readonly credential: Buffer;
+  private readonly requester: AmapRequester;
+  private disposed = false;
+
+  constructor(value: string, options: { request?: AmapRequester } = {}) {
+    if (!value.trim()) throw new AmapAdapterError("amap_invalid_request");
+    this.credential = Buffer.from(value, "utf8");
+    this.requester = options.request ?? requestAmapJson;
+  }
+
+  async reverseGeocode(coordinates: { latitude: number; longitude: number }) {
+    if (this.disposed) throw new AmapAdapterError("amap_adapter_disposed");
+    if (!Number.isFinite(coordinates.latitude) || coordinates.latitude < -90 || coordinates.latitude > 90
+      || !Number.isFinite(coordinates.longitude) || coordinates.longitude < -180 || coordinates.longitude > 180) {
+      throw new AmapAdapterError("amap_invalid_request");
+    }
+    const query = new URLSearchParams({
+      extensions: "base",
+      key: this.credential.toString("utf8"),
+      location: `${coordinates.longitude},${coordinates.latitude}`,
+    });
+    const response = await this.requester({
+      allowRedirects: false,
+      hostname: amapHostname,
+      maxResponseBytes: amapMaxResponseBytes,
+      method: "GET",
+      path: `/v3/geocode/regeo?${query.toString()}`,
+      protocol: "https:",
+      rejectUnauthorized: true,
+      timeoutMs: amapTimeoutMs,
+    });
+    if (!isRecord(response) || response.status !== "1" || !isRecord(response.regeocode)) {
+      throw new AmapAdapterError("amap_provider_rejected");
+    }
+    const formattedValue = typeof response.regeocode.formatted_address === "string"
+      ? response.regeocode.formatted_address.trim()
+      : "";
+    if (!formattedValue || formattedValue.length > 200) throw new AmapAdapterError("amap_invalid_response");
+    return { formattedValue, serviceMode: "real" as const };
+  }
+
+  dispose() {
+    if (this.disposed) return;
+    this.disposed = true;
+    this.credential.fill(0);
+  }
+}