From 7d29dc4cc0bc9ad12f698d373915045ae1d723f2 Mon Sep 17 00:00:00 2001
From: Jens Geyer <jensg@apache.org>
Date: Tue, 4 May 2021 22:59:25 +0200
Subject: [PATCH] THRIFT-5408 Support for deprecated/obsolete methods (via
 annotation) Client: netstd Patch: Jens Geyer

---
 .../src/thrift/generate/t_netstd_generator.cc | 43 +++++++++++++++++++
 .../src/thrift/generate/t_netstd_generator.h  |  1 +
 .../optional_required_default.thrift          |  8 ++++
 3 files changed, 52 insertions(+)

diff --git a/compiler/cpp/src/thrift/generate/t_netstd_generator.cc b/compiler/cpp/src/thrift/generate/t_netstd_generator.cc
index 766d2b62fd9..fd218f8f88f 100644
--- a/compiler/cpp/src/thrift/generate/t_netstd_generator.cc
+++ b/compiler/cpp/src/thrift/generate/t_netstd_generator.cc
@@ -1943,6 +1943,16 @@ void t_netstd_generator::generate_service_interface(ostream& out, t_service* tse
             }
         }
 
+        auto iter = (*f_iter)->annotations_.find("deprecated");
+        if( (*f_iter)->annotations_.end() != iter) {
+          out << indent() << "[Obsolete";
+          // empty annotation values end up with "1" somewhere, ignore these as well
+          if ((iter->second.length() > 0) && (iter->second != "1")) {
+            out << "(" << make_csharp_string_literal(iter->second) << ")";
+          }
+          out << "]" << endl;
+        }
+
         out << indent() << function_signature_async(*f_iter) << ";" << endl << endl;
     }
     indent_down();
@@ -2312,6 +2322,11 @@ void t_netstd_generator::generate_process_function_async(ostream& out, t_service
     const vector<t_field*>& fields = arg_struct->get_members();
     vector<t_field*>::const_iterator f_iter;
 
+    bool is_deprecated = (tfunction->annotations_.end() != tfunction->annotations_.find("deprecated"));
+    if( is_deprecated) {
+      out << indent() << "#pragma warning disable CS0618,CS0612" << endl; 
+    }
+
     out << indent();
     if (!tfunction->is_oneway() && !tfunction->get_returntype()->is_void())
     {
@@ -2346,6 +2361,10 @@ void t_netstd_generator::generate_process_function_async(ostream& out, t_service
 
     out << "cancellationToken);" << endl;
 
+    if( is_deprecated) {
+      out << indent() << "#pragma warning restore CS0618,CS0612" << endl; 
+    }
+
     vector<t_field*>::const_iterator x_iter;
 
     collect_extensions_types(xs);
@@ -2947,6 +2966,30 @@ void t_netstd_generator::generate_netstd_property(ostream& out, t_field* tfield,
     out << endl;
 }
 
+string t_netstd_generator::make_csharp_string_literal( string const& value)
+{
+  if (value.length() == 0) {
+    return "";
+  }
+
+  std::stringstream result;
+  result << "\"";
+  for (signed char const c: value) {
+    if( (c >= 0) && (c < 32)) {  // convert ctrl chars, but leave UTF-8 alone
+      int width = std::max( (int)sizeof(c), 4);
+      result << "\\x" << std::hex << std::setw(width) << std::setfill('0') << (int)c;
+    } else if ((c == '\\') || (c == '"')) {
+      result << "\\" << c;
+    } else {
+      result << c;   // anything else "as is"
+    }
+  }
+  result << "\"";
+  
+  return result.str();
+}
+
+
 string t_netstd_generator::make_valid_csharp_identifier(string const& fromName)
 {
     string str = fromName;
diff --git a/compiler/cpp/src/thrift/generate/t_netstd_generator.h b/compiler/cpp/src/thrift/generate/t_netstd_generator.h
index 8a812a35321..b35550db774 100644
--- a/compiler/cpp/src/thrift/generate/t_netstd_generator.h
+++ b/compiler/cpp/src/thrift/generate/t_netstd_generator.h
@@ -165,6 +165,7 @@ class t_netstd_generator : public t_oop_generator
   void init_keywords();
   string normalize_name(string name);
   string make_valid_csharp_identifier(string const& fromName);
+  string make_csharp_string_literal( string const& value);
   void prepare_member_name_mapping(t_service* tservice);
   void prepare_member_name_mapping(t_struct* tstruct);
   void prepare_member_name_mapping(t_struct* scope, const vector<t_field*>& members, const string& structname);
diff --git a/lib/netstd/Tests/Thrift.PublicInterfaces.Compile.Tests/optional_required_default.thrift b/lib/netstd/Tests/Thrift.PublicInterfaces.Compile.Tests/optional_required_default.thrift
index 1f6c7ee5ead..4a38205dcc7 100644
--- a/lib/netstd/Tests/Thrift.PublicInterfaces.Compile.Tests/optional_required_default.thrift
+++ b/lib/netstd/Tests/Thrift.PublicInterfaces.Compile.Tests/optional_required_default.thrift
@@ -141,3 +141,11 @@ service foobar {
     set<set<set<Distance>>> DoItNow( 1 : list<list<list<RaceDetails>>> rd, 2: i32 mitDefault = 42) throws (1: CrashBoomBang cbb)
 }
 
+service deprecate_everything {
+  void Foo( ) ( deprecated = "This method has neither 'x' nor \"y\"" )
+  void Bar( ) ( deprecated = "Fails to deliver 中文 колбаса" )
+  void Baz( ) ( deprecated = "Need this to work with tabs (\t) or Umlauts (äöüÄÖÜß) too" )
+  void Deprecated() ( deprecated ) // no comment
+}
+
+