Add new familiar followers endpoint

server/api/api/v1/accounts/familiar_followers/index.ts

@@ -0,0 +1,73 @@
+import { getUserByToken } from "@auth";
+import { parseRequest } from "@request";
+import { errorResponse, jsonResponse } from "@response";
+import { User } from "~database/entities/User";
+import { APIAccount } from "~types/entities/account";
+
+/**
+ * Find familiar followers (followers of a user that you also follow)
+ */
+export default async (req: Request): Promise<Response> => {
+	// Check auth token
+	const token = req.headers.get("Authorization")?.split(" ")[1] || null;
+
+	if (!token)
+		return errorResponse("This method requires an authenticated user", 422);
+
+	const self = await getUserByToken(token);
+
+	if (!self) return errorResponse("Unauthorized", 401);
+
+	const { "id[]": ids } = await parseRequest<{
+		"id[]": string[];
+	}>(req);
+
+	// Minimum id count 1, maximum 10
+	if (!ids || ids.length < 1 || ids.length > 10) {
+		return errorResponse("Number of ids must be between 1 and 10", 422);
+	}
+
+	const response = (
+		await Promise.all(
+			ids.map(async id => {
+				// Find followers of user that you also follow
+
+				// Get user
+				const user = await User.findOne({
+					where: { id },
+					relations: {
+						relationships: {
+							subject: {
+								relationships: true,
+							},
+						},
+					},
+				});
+
+				if (!user) return null;
+
+				// Map to user response
+				const response = user.relationships
+					.filter(r => r.following)
+					.map(r => r.subject)
+					.filter(u =>
+						u.relationships.some(
+							r => r.following && r.subject.id === self.id
+						)
+					);
+
+				return {
+					id: id,
+					accounts: await Promise.all(
+						response.map(async u => await u.toAPI())
+					),
+				};
+			})
+		)
+	).filter(r => r !== null) as {
+		id: string;
+		accounts: APIAccount[];
+	}[];
+
+	return jsonResponse(response);
+};

server/api/api/v1/accounts/relationships/index.ts

@@ -5,7 +5,7 @@ import { Relationship } from "~database/entities/Relationship";
 import { User } from "~database/entities/User";
 
 /**
- * Sets a user note
+ * Find relationships
  */
 export default async (req: Request): Promise<Response> => {
 	// Check auth token