add subs service

Cargo.toml

@@ -42,6 +42,8 @@ members = [
     "limit-server-event",
     "limit-server-event-test",
 
+    "limit-server-subs",
+
     "limit-db",
     "limit-config",
     "limit-test-utils",

idl/subs.proto

@@ -0,0 +1,31 @@
+syntax = "proto3";
+package limit.subs;
+
+import "auth.proto";
+import "subs.types.proto";
+
+message SubscribableObject {
+    // subscribable object id
+    string id = 1;
+    // public key
+    string pubkey = 6;
+}
+
+message GetObjectsRequest {
+    limit.auth.Auth token = 1;
+    // target subscribable object ids
+    repeated string ids = 2;
+}
+
+message GetSubscribableObjectsResponse {
+    repeated SubscribableObject objects = 1;
+}
+
+message GetProfilesResponse {
+    repeated limit.subs.types.Profile profiles = 1;
+}
+
+service SubsService {
+    rpc GetSubscribableObjects(GetObjectsRequest) returns (GetSubscribableObjectsResponse);
+    rpc GetProfiles(GetObjectsRequest) returns (GetProfilesResponse);
+}

idl/subs.types.proto

@@ -0,0 +1,37 @@
+syntax = "proto3";
+package limit.subs.types;
+
+import "utils.proto";
+
+enum Types {
+    USER = 0;
+    GROUP = 1;
+}
+
+message Profile {
+    // [email protected]
+    string username = 1;
+    // subscribable object name
+    string name = 2;
+    // intro
+    string bio = 3;
+    // avatar link
+    string avatar = 4;
+
+    oneof detail {
+        User user = 5;
+        Group group = 6;
+    }
+}
+
+message User {
+    // last seen date
+    limit.utils.Date last_seen = 1;
+    // last modified date
+    limit.utils.Date last_modified = 2;
+}
+
+message Group {
+    // ids of group members
+    repeated string members = 1;
+}