Add user lookup

megalodon/src/misskey.ts

@@ -2355,6 +2355,39 @@ export default class Misskey implements MegalodonInterface {
             limit: 20
           })
         }
+
+        try {
+          const match = q.match(/^@(?<user>.*?)(?:@(?<host>.*?)|)$/);
+          if (match) {
+            const lookupQuery = {
+              username: match.groups?.user,
+              host: match.groups?.host
+            };
+
+            const result = await this.client.post<MisskeyAPI.Entity.UserDetail>('/api/users/show', lookupQuery).then(res => ({
+              ...res,
+              data: {
+                accounts: [this.converter.userDetail(res.data, this.baseUrlToHost(this.baseUrl))],
+                statuses: [],
+                hashtags: []
+              }
+            }));
+
+            if (result.status !== 200) {
+              result.status = 200;
+              result.statusText = "OK";
+              result.data = {
+                accounts: [],
+                statuses: [],
+                hashtags: []
+              };
+            }
+
+            return result;
+          }
+        }
+        catch {}
+
         return this.client.post<Array<MisskeyAPI.Entity.UserDetail>>('/api/users/search', params).then(res => ({
           ...res,
           data: {