feat: implemented jsonplaceholders rest apis grpc method

build.rs

@@ -1,14 +1,35 @@
 use std::path::PathBuf;
 
 fn main() {
+    fn configure_tonic() -> tonic_build::Builder {
+        tonic_build::configure()
+            .protoc_arg("--experimental_allow_proto3_optional")
+            .build_server(true)
+            .build_client(true)
+    }
+
+    // Compile news.proto
     let mut news = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
     news.push("news.proto");
-    tonic_build::compile_protos(news).expect("Failed to compile protos");
 
+    // Configure and compile each proto file with descriptors
     let out_dir = PathBuf::from(std::env::var("OUT_DIR").unwrap());
 
-    tonic_build::configure()
+    // Compile news.proto
+    configure_tonic()
         .file_descriptor_set_path(out_dir.join("news_descriptor.bin"))
-        .compile(&["news.proto"], &["proto"])
-        .unwrap();
+        .compile(&["news.proto"], &["."])
+        .expect("Failed to compile news.proto");
+
+    // Compile posts.proto
+    configure_tonic()
+        .file_descriptor_set_path(out_dir.join("posts_descriptor.bin"))
+        .compile(&["posts.proto"], &["."])
+        .expect("Failed to compile posts.proto");
+
+    // Compile users.proto
+    configure_tonic()
+        .file_descriptor_set_path(out_dir.join("users_descriptor.bin"))
+        .compile(&["users.proto"], &["."])
+        .expect("Failed to compile users.proto");
 }

posts.proto

@@ -0,0 +1,35 @@
+syntax = "proto3";
+package posts;
+
+message Post {
+  int32 id = 1;
+  int32 userId = 2;
+  string title = 3;
+  string body = 4;
+}
+
+message Filter {
+  optional int32 userId = 1;
+}
+
+message PostRequest {
+  int32 id = 1;
+}
+
+message PostList {
+  repeated Post posts = 1;
+}
+
+message PostResponse {
+  Post post = 1;
+}
+
+message DeleteResponse {}
+
+service PostService {
+  rpc ListPosts(Filter) returns (PostList);
+  rpc GetPost(PostRequest) returns (Post);
+  rpc CreatePost(Post) returns (PostResponse);
+  rpc UpdatePost(Post) returns (PostResponse);
+  rpc DeletePost(PostRequest) returns (DeleteResponse);
+}