Slon/Api/V2: Add initial support for Search endpoint

Slon/Api/V2/Search.HC

@@ -0,0 +1,52 @@
+U0 @slon_api_v2_search_get(SlonHttpSession* session)
+{
+    SLON_SCRATCH_BUFFER_AND_REQUEST_JSON
+
+    if (@slon_api_authorized(session)) {
+        // SLON_AUTH_ACCOUNT_ID
+        // FIXME: Implement this
+        JsonObject* results = Json.CreateObject();
+        results->set("accounts", Json.CreateArray(), JSON_ARRAY);
+        results->set("statuses", Json.CreateArray(), JSON_ARRAY);
+        results->set("hashtags", Json.CreateArray(), JSON_ARRAY);
+
+        U8* q = request_json->@("q");
+        if (!q) {
+            goto slon_api_v2_search_get_return;
+        }
+
+        if (q[0] == '@' || StrFind("@", request_json->@("q")) > 0) {
+            // if "type" is specified, value must be "accounts"
+            // if "resolve" is TRUE, do WebFinger lookup if the remote account doesn't exist on this server
+            I64 at_fragment_count = 0;
+            U8* q_copy = @slon_strnew(session, q);
+            U8** at_fragments = String.Split(q_copy, '@', &at_fragment_count);
+
+            switch (at_fragment_count) {
+            case 2:
+                // Local user
+                // break;
+            case 3:
+                // Remote user
+                StrPrint(scratch_buffer, "%s@%s", at_fragments[0], at_fragments[1]);
+                JsonObject* remote_account = @slon_api_account_by_acct(scratch_buffer);
+                if (remote_account) {
+                    results->a("accounts")->append(Json.CreateItem(remote_account, JSON_OBJECT));
+                } else {
+                }
+                break;
+            default:
+                // Unsupported
+                break;
+            }
+
+            @slon_free(session, q_copy);
+        }
+
+    slon_api_v2_search_get_return:
+        @slon_http_send_json(session, results);
+        Json.Delete(results);
+    } else {
+        @slon_http_set_status_code(session, 401);
+    }
+}

Slon/Endpoints/Get/Search.HC

@@ -0,0 +1,4 @@
+if (!StrICmp("/api/v2/search", @slon_http_request_path(session))) {
+    @slon_api_v2_search_get(session);
+    return;
+}

Slon/Http/Server.HC

@@ -405,6 +405,7 @@ U0 @slon_http_handle_get_request(SlonHttpSession* session)
     #include "Endpoints/Get/Instance";
     #include "Endpoints/Get/Notifications";
     #include "Endpoints/Get/OAuth";
+    #include "Endpoints/Get/Search";
     #include "Endpoints/Get/Suggestions";
     #include "Endpoints/Get/Timelines";
     #include "Endpoints/Get/Web";

Slon/MakeSlon.HC

@@ -24,6 +24,7 @@ WinMax(Fs);
 
 #include "Api/V2/Filters";
 #include "Api/V2/Instance";
+#include "Api/V2/Search";
 #include "Api/V2/Suggestions";
 
 #include "Modules/ActivityPub";