text: /*
   * Copyright 2016-present Facebook, Inc.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  #include <ctime>
  #include <sys/types.h>
  
  #include <string>
  #include <fstream>
  #include <iostream>
  #include <vector>
  
  #include <sstream>
  
  #include <boost/filesystem.hpp>
  
  #include <thrift/compiler/generate/t_oop_generator.h>
  using namespace std;
  
  
  /**
   * Smalltalk code generator.
   *
   */
  class t_st_generator : public t_oop_generator {
   public:
    t_st_generator(
        t_program* program,
        t_generation_context context,
        const std::map<std::string, std::string>& /* parsed_options */,
        const std::string& /* option_string */)
        : t_oop_generator(program, std::move(context)) {
      out_dir_base_ = "gen-st";
    }
  
    /**
     * Init and close methods
     */
  
    void init_generator() override;
    void close_generator() override;
  
    /**
     * Program-level generation functions
     */
  
    void generate_typedef(t_typedef* ttypedef) override;
    void generate_enum(t_enum* tenum) override;
    void generate_const(t_const* tconst) override;
    void generate_struct(t_struct* tstruct) override;
    void generate_xception(t_struct* txception) override;
    void generate_service(t_service* tservice) override;
    void generate_class_side_definition ();
    void generate_force_consts ();
  
  
    std::string render_const_value(t_type* type, t_const_value* value);
  
    /**
     * Struct generation code
     */
  
    void generate_st_struct (std::ofstream& out, t_struct* tstruct, bool is_exception);
    void generate_accessors   (std::ofstream& out, t_struct* tstruct);
  
    /**
     * Service-level generation functions
     */
  
    void generate_service_client    (t_service* tservice);
  
    void generate_send_method (t_function* tfunction);
    void generate_recv_method (t_function* tfunction);
  
    std::string map_reader (t_map *tmap);
    std::string list_reader (t_list *tlist);
    std::string set_reader (t_set *tset);
    std::string struct_reader (t_struct *tstruct, std::string clsName);
  
    std::string map_writer (t_map *tmap, std::string name);
    std::string list_writer (t_list *tlist, std::string name);
    std::string set_writer (t_set *tset, std::string name);
    std::string struct_writer (t_struct *tstruct, std::string fname);
  
    std::string write_val (t_type *t, std::string fname);
    std::string read_val (t_type *t);
  
    /**
     * Helper rendering functions
     */
  
    std::string st_autogen_comment();
  
    void st_class_def(std::ofstream &out, std::string name);
    void st_method(std::ofstream &out, std::string cls, std::string name);
    void st_method(std::ofstream &out, std::string cls, std::string name, std::string category);
    void st_close_method(std::ofstream &out);
    void st_class_method(std::ofstream &out, std::string cls, std::string name);
    void st_class_method(std::ofstream &out, std::string cls, std::string name, std::string category);
    void st_setter(std::ofstream &out, std::string cls, std::string name, std::string type);
    void st_getter(std::ofstream &out, std::string cls, std::string name);
    void st_accessors(std::ofstream &out, std::string cls, std::string name, std::string type);
  
    std::string class_name();
    std::string client_class_name();
    std::string prefix(std::string name);
    std::string declare_field(t_field* tfield);
    std::string sanitize(std::string s);
    std::string type_name(t_type* ttype);
  
    std::string function_signature(t_function* tfunction);
    std::string argument_list(t_struct* tstruct);
    std::string function_types_comment(t_function* fn);
  
    std::string type_to_enum(t_type* ttype);
    std::string a_type(t_type* type);
    bool is_vowel(char c);
    std::string temp_name();
    std::string generated_category();
  
   private:
  
    /**
     * File streams
     */
    int temporary_var;
    std::ofstream f_;
  
  };
  
  
  /**
   * Prepares for file generation by opening up the necessary file output
   * streams.
   *
   * @param tprogram The program to generate
   */
  void t_st_generator::init_generator() {
    // Make output directory
    boost::filesystem::create_directory(get_out_dir());
  
    temporary_var = 0;
  
    // Make output file
    string f_name = get_out_dir()+"/"+program_name_+".st";
    f_.open(f_name.c_str());
    record_genfile(f_name);
  
    // Print header
    f_ << st_autogen_comment() << endl;
  
    st_class_def(f_, program_name_);
    generate_class_side_definition();
  
    //Generate enums
    vector<t_enum*> enums = program_->get_enums();
    vector<t_enum*>::iterator en_iter;
    for (en_iter = enums.begin(); en_iter != enums.end(); ++en_iter) {
      generate_enum(*en_iter);
    }
  }
  
  string t_st_generator::class_name() {
    return capitalize(program_name_);
  }
  
  string t_st_generator::prefix(string class_name) {
    string prefix = program_->get_namespace("smalltalk.prefix");
    string name = capitalize(class_name);
    name = prefix.empty() ? name : (prefix + name);
    return name;
  }
  
  string t_st_generator::client_class_name() {
    return capitalize(service_name_) + "Client";
  }
  
  /**
   * Autogen'd comment
   */
  string t_st_generator::st_autogen_comment() {
    return
      std::string("'") +
      "Autogenerated by Thrift\n" +
      "\n" +
      "DO NOT EDIT UNLESS YOU ARE SURE THAT YOU KNOW WHAT YOU ARE DOING\n" +
      "'!\n";
  }
  
  void t_st_generator::generate_force_consts() {
    f_ << prefix(class_name()) << " enums keysAndValuesDo: [:k :v | " <<
      prefix(class_name()) << " enums at: k put: v value].!" << endl;
  
    f_ << prefix(class_name()) << " constants keysAndValuesDo: [:k :v | " <<
      prefix(class_name()) << " constants at: k put: v value].!" << endl;
  
  }
  
  void t_st_generator::close_generator() {
    generate_force_consts();
    f_.close();
  }
  
  string t_st_generator::generated_category() {
    string cat = program_->get_namespace("smalltalk.category");
    // For compatibility with the Thrift grammar, the category must
    // be punctuated by dots.  Replaces them with dashes here.
    for (string::iterator iter = cat.begin(); iter != cat.end(); ++iter) {
      if (*iter == '.') {
        *iter = '-';
      }
    }
    return cat.size() ? cat : "Generated-" + class_name();
  }
  
  /**
   * Generates a typedef. This is not done in Smalltalk, types are all implicit.
   *
   * @param ttypedef The type definition
   */
  void t_st_generator::generate_typedef(t_typedef* /* ttypedef */) {}
  
  void t_st_generator::st_class_def(std::ofstream &out, string name) {
    out << "Object subclass: #" << prefix(name) << endl;
    indent_up();
    out << indent() << "instanceVariableNames: ''" << endl <<
      indent() << "classVariableNames: ''" << endl <<
      indent() << "poolDictionaries: ''" << endl <<
      indent() << "category: '" << generated_category() << "'!" << endl << endl;
  }
  
  void t_st_generator::st_method(std::ofstream &out, string cls, string name) {
    st_method(out, cls, name, "as yet uncategorized");
  }
  
  void t_st_generator::st_class_method(std::ofstream &out, string cls, string name) {
    st_method(out, cls + " class", name);
  }
  
  void t_st_generator::st_class_method(std::ofstream &out, string cls, string name, string category) {
    st_method(out, cls, name, category);
  }
  
  void t_st_generator::st_method(std::ofstream &out, string cls, string name, string category) {
    char timestr[50];
    time_t rawtime;
    struct tm *tinfo;
  
    time(&rawtime);
    tinfo = localtime(&rawtime);
    strftime(timestr, 50, "%m/%d/%Y %H:%M", tinfo);
  
    out << "!" << prefix(cls) <<
      " methodsFor: '"+category+"' stamp: 'thrift " << timestr << "'!\n" <<
      name << endl;
  
    indent_up();
    out << indent();
  }
  
  void t_st_generator::st_close_method(std::ofstream &out) {
    out << "! !" << endl << endl;
    indent_down();
  }
  
  void t_st_generator::st_setter(std::ofstream &out, string cls, string name, string type = "anObject") {
    st_method(out, cls, name + ": " + type);
    out << name << " := " + type;
    st_close_method(out);
  }
  
  void t_st_generator::st_getter(std::ofstream &out, string cls, string name) {
    st_method(out, cls, name + "");
    out << "^ " << name;
    st_close_method(out);
  }
  
  void t_st_generator::st_accessors(std::ofstream &out, string cls, string name, string type = "anObject") {
    st_setter(out, cls, name, type);
    st_getter(out, cls, name);
  }
  
  void t_st_generator::generate_class_side_definition() {
    f_ << prefix(class_name()) << " class" << endl <<
      "\tinstanceVariableNames: 'constants enums'!" << endl << endl;
  
    st_accessors(f_, class_name() + " class", "enums");
    st_accessors(f_, class_name() + " class", "constants");
  
    f_ << prefix(class_name()) << " enums: Dictionary new!" << endl;
    f_ << prefix(class_name()) << " constants: Dictionary new!" << endl;
  
    f_ << endl;
  }
  
  /**
   * Generates code for an enumerated type. Done using a class to scope
   * the values.
   *
   * @param tenum The enumeration
   */
  void t_st_generator::generate_enum(t_enum* tenum) {
    string cls_name = program_name_ + capitalize(tenum->get_name());
  
    f_ << prefix(class_name()) << " enums at: '" << tenum->get_name() << "' put: [" <<
      "(Dictionary new " << endl;
  
    vector<t_enum_value*> constants = tenum->get_enum_values();
    vector<t_enum_value*>::iterator c_iter;
    for (c_iter = constants.begin(); c_iter != constants.end(); ++c_iter) {
      int32_t value = (*c_iter)->get_value();
  
      f_ << "\tat: '" << (*c_iter)->get_name() << "' put: " << value << ";" << endl;
    }
  
    f_ << "\tyourself)]!" << endl << endl;
  }
  
  /**
   * Generate a constant value
   */
  void t_st_generator::generate_const(t_const* tconst) {
    t_type* type = tconst->get_type();
    string name = tconst->get_name();
    t_const_value* value = tconst->get_value();
  
    f_ << prefix(class_name()) << " constants at: '" << name << "' put: [" <<
      render_const_value(type, value) << "]!" << endl << endl;
  }
  
  /**
   * Prints the value of a constant with the given type. Note that type checking
   * is NOT performed in this function as it is always run beforehand using the
   * validate_types method in main.cc
   */
  string t_st_generator::render_const_value(t_type* type, t_const_value* value) {
    type = type->get_true_type();
    std::ostringstream out;
    if (type->is_base_type()) {
      t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
      switch (tbase) {
      case t_base_type::TYPE_STRING:
      case t_base_type::TYPE_BINARY:
        out << "'" << value->get_string() << "'";
        break;
      case t_base_type::TYPE_BOOL:
        out << (value->get_integer() > 0 ? "true" : "false");
        break;
      case t_base_type::TYPE_BYTE:
      case t_base_type::TYPE_I16:
      case t_base_type::TYPE_I32:
      case t_base_type::TYPE_I64:
        out << value->get_integer();
        break;
      case t_base_type::TYPE_DOUBLE:
        if (value->get_type() == t_const_value::CV_INTEGER) {
          out << value->get_integer();
        } else {
          out << value->get_double();
        }
        break;
      default:
        throw "compiler error: no const of base type " + t_base_type::t_base_name(tbase);
      }
    } else if (type->is_enum()) {
      indent(out) << value->get_integer();
    } else if (type->is_struct() || type->is_xception()) {
      out << "(" << capitalize(type->get_name()) << " new " << endl;
      indent_up();
  
      const vector<t_field*>& fields = ((t_struct*)type)->get_members();
      vector<t_field*>::const_iterator f_iter;
      const vector<pair<t_const_value*, t_const_value*>>& val = value->get_map();
      vector<pair<t_const_value*, t_const_value*>>::const_iterator v_iter;
  
      for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
        t_type* field_type = nullptr;
        for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
          if ((*f_iter)->get_name() == v_iter->first->get_string()) {
            field_type = (*f_iter)->get_type();
          }
        }
        if (field_type == nullptr) {
          throw "type error: " + type->get_name() + " has no field " + v_iter->first->get_string();
        }
  
        out << indent() << v_iter->first->get_string() << ": " <<
          render_const_value(field_type, v_iter->second) << ";" << endl;
      }
      out << indent() << "yourself)";
  
      indent_down();
    } else if (type->is_map()) {
      t_type* ktype = ((t_map*)type)->get_key_type();
      t_type* vtype = ((t_map*)type)->get_val_type();
      out << "(Dictionary new" << endl;
      indent_up();
      indent_up();
      const vector<pair<t_const_value*, t_const_value*>>& val = value->get_map();
      vector<pair<t_const_value*, t_const_value*>>::const_iterator v_iter;
      for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
        out << indent() << indent();
        out << "at: " << render_const_value(ktype, v_iter->first);
        out << " put: ";
        out << render_const_value(vtype, v_iter->second);
        out << ";" << endl;
      }
      out << indent() << indent() << "yourself)";
      indent_down();
      indent_down();
    } else if (type->is_list() || type->is_set()) {
      t_type* etype;
      if (type->is_list()) {
        etype = ((t_list*)type)->get_elem_type();
      } else {
        etype = ((t_set*)type)->get_elem_type();
      }
      if (type->is_set()) {
        out << "(Set new" << endl;
      } else {
        out << "(OrderedCollection new" << endl;
      }
      indent_up();
      indent_up();
      const vector<t_const_value*>& val = value->get_list();
      vector<t_const_value*>::const_iterator v_iter;
      for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
        out << indent() << indent();
        out << "add: " << render_const_value(etype, *v_iter);
        out << ";" << endl;
      }
      out << indent() << indent() << "yourself)";
      indent_down();
      indent_down();
    } else {
      throw "CANNOT GENERATE CONSTANT FOR TYPE: " + type->get_name();
    }
    return out.str();
  }
  
  /**
   * Generates a Smalltalk struct
   */
  void t_st_generator::generate_struct(t_struct* tstruct) {
    generate_st_struct(f_, tstruct, false);
  }
  
  /**
   * Generates a struct definition for a thrift exception. Basically the same
   * as a struct but extends the Exception class.
   *
   * @param txception The struct definition
   */
  void t_st_generator::generate_xception(t_struct* txception) {
    generate_st_struct(f_, txception, true);
  }
  
  /**
   * Generates a smalltalk class to represent a struct
   */
  void t_st_generator::generate_st_struct(std::ofstream& out, t_struct* tstruct, bool is_exception = false) {
    const vector<t_field*>& members = tstruct->get_members();
    vector<t_field*>::const_iterator m_iter;
  
    if (is_exception)
      out << "Error";
    else
      out << "Object";
  
    out << " subclass: #" << prefix(type_name(tstruct)) << endl <<
      "\tinstanceVariableNames: '";
  
    if (members.size() > 0) {
      for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
        if (m_iter != members.begin()) out << " ";
        out << sanitize((*m_iter)->get_name());
      }
    }
  
    out << "'\n" <<
      "\tclassVariableNames: ''\n" <<
      "\tpoolDictionaries: ''\n" <<
      "\tcategory: '" << generated_category() << "'!\n\n";
  
    generate_accessors(out, tstruct);
  }
  
  bool t_st_generator::is_vowel(char c) {
    switch(tolower(c)) {
      case 'a': case 'e': case 'i': case 'o': case 'u':
      return true;
    }
    return false;
  }
  
  string t_st_generator::a_type(t_type* type) {
    string prefix;
  
    if (is_vowel(type_name(type)[0]))
      prefix = "an";
    else
      prefix = "a";
  
    return prefix + capitalize(type_name(type));
  }
  
  void t_st_generator::generate_accessors(std::ofstream& out, t_struct* tstruct) {
    const vector<t_field*>& members = tstruct->get_members();
    vector<t_field*>::const_iterator m_iter;
    string type;
    string prefix;
  
    if (members.size() > 0) {
      for (m_iter = members.begin(); m_iter != members.end(); ++m_iter) {
        st_accessors(out,
                     capitalize(type_name(tstruct)),
                     sanitize((*m_iter)->get_name()),
                     a_type((*m_iter)->get_type()));
      }
      out << endl;
    }
  }
  
  /**
   * Generates a thrift service.
   *
   * @param tservice The service definition
   */
  void t_st_generator::generate_service(t_service* tservice) {
    generate_service_client(tservice);
    // generate_service_server(tservice);
  }
  
  string t_st_generator::temp_name() {
    std::ostringstream out;
    out << "temp" << temporary_var++;
    return out.str();
  }
  
  string t_st_generator::map_writer(t_map *tmap, string fname) {
    std::ostringstream out;
    string key = temp_name();
    string val = temp_name();
  
    out << "[oprot writeMapBegin: (TMap new keyType: " << type_to_enum(tmap->get_key_type()) <<
      "; valueType: " << type_to_enum(tmap->get_val_type()) << "; size: " << fname << " size)." << endl;
    indent_up();
  
    out << indent() << fname << " keysAndValuesDo: [:" << key << " :" << val << " |" << endl;
    indent_up();
  
    out << indent() << write_val(tmap->get_key_type(), key) << "." << endl <<
      indent() << write_val(tmap->get_val_type(), val);
    indent_down();
  
    out << "]." << endl <<
      indent() << "oprot writeMapEnd] value";
    indent_down();
  
    return out.str();
  }
  
  string t_st_generator::map_reader(t_map *tmap) {
    std::ostringstream out;
    string desc = temp_name();
    string val = temp_name();
  
    out << "[|" << desc << " " << val << "| " << endl;
    indent_up();
  
    out << indent() << desc << " := iprot readMapBegin." << endl <<
      indent() << val << " := Dictionary new." << endl <<
      indent() << desc << " size timesRepeat: [" << endl;
  
    indent_up();
    out << indent() << val << " at: " << read_val(tmap->get_key_type()) <<
      " put: " << read_val(tmap->get_val_type());
    indent_down();
  
    out << "]." << endl <<
      indent() << "iprot readMapEnd." << endl <<
    indent() << val << "] value";
    indent_down();
  
    return out.str();
  }
  
  string t_st_generator::list_writer(t_list *tlist, string fname) {
    std::ostringstream out;
    string val = temp_name();
  
    out << "[oprot writeListBegin: (TList new elemType: " <<
      type_to_enum(tlist->get_elem_type()) << "; size: " << fname << " size)." << endl;
    indent_up();
  
    out << indent() << fname << " do: [:" << val << "|" << endl;
    indent_up();
  
    out << indent() << write_val(tlist->get_elem_type(), val) << endl;
    indent_down();
  
    out << "]." << endl <<
      indent() << "oprot writeListEnd] value";
    indent_down();
  
    return out.str();
  }
  
  string t_st_generator::list_reader(t_list *tlist) {
    std::ostringstream out;
    string desc = temp_name();
    string val = temp_name();
  
    out << "[|" << desc << " " << val << "| " << desc << " := iprot readListBegin." << endl;
    indent_up();
  
    out << indent() << val << " := OrderedCollection new." << endl <<
      indent() << desc << " size timesRepeat: [" << endl;
  
    indent_up();
    out << indent() << val << " add: " << read_val(tlist->get_elem_type());
    indent_down();
  
    out << "]." << endl <<
      indent() << "iprot readListEnd." << endl <<
    indent() << val << "] value";
    indent_down();
  
    return out.str();
  }
  
  string t_st_generator::set_writer(t_set *tset, string fname) {
    std::ostringstream out;
    string val = temp_name();
  
    out << "[oprot writeSetBegin: (TSet new elemType: " << type_to_enum(tset->get_elem_type()) <<
      "; size: " << fname << " size)." << endl;
    indent_up();
  
    out << indent() << fname << " do: [:" << val << "|" << endl;
    indent_up();
  
    out << indent() << write_val(tset->get_elem_type(), val) << endl;
    indent_down();
  
    out << "]." << endl <<
      indent() << "oprot writeSetEnd] value";
    indent_down();
  
    return out.str();
  }
  
  string t_st_generator::set_reader(t_set *tset) {
    std::ostringstream out;
    string desc = temp_name();
    string val = temp_name();
  
    out << "[|" << desc << " " << val << "| " << desc << " := iprot readSetBegin." << endl;
    indent_up();
  
    out << indent() << val << " := Set new." << endl <<
      indent() << desc << " size timesRepeat: [" << endl;
  
    indent_up();
    out << indent() << val << " add: " << read_val(tset->get_elem_type());
    indent_down();
  
    out << "]." << endl <<
      indent() << "iprot readSetEnd." << endl <<
    indent() << val << "] value";
    indent_down();
  
    return out.str();
  }
  
  string t_st_generator::struct_writer(t_struct *tstruct, string sname) {
    std::ostringstream out;
    const vector<t_field*>& fields = tstruct->get_sorted_members();
    vector<t_field*>::const_iterator fld_iter;
  
    out << "[oprot writeStructBegin: " <<
      "(TStruct new name: '" + tstruct->get_name() +"')." << endl;
    indent_up();
  
    for (fld_iter = fields.begin(); fld_iter != fields.end(); ++fld_iter) {
      bool optional = (*fld_iter)->get_req() == t_field::T_OPTIONAL;
      string fname = (*fld_iter)->get_name();
      string accessor = sname + " " + sanitize(fname);
  
      if (optional) {
        out << indent() << accessor << " ifNotNil: [" << endl;
        indent_up();
      }
  
      out << indent() << "oprot writeFieldBegin: (TField new name: '" << fname <<
        "'; type: " << type_to_enum((*fld_iter)->get_type()) <<
        "; id: " << (*fld_iter)->get_key() << ")." << endl;
  
      out << indent() << write_val((*fld_iter)->get_type(), accessor) << "." << endl <<
        indent() << "oprot writeFieldEnd";
  
      if (optional) {
        out << "]";
        indent_down();
      }
  
      out << "." << endl;
    }
  
    out << indent() << "oprot writeFieldStop; writeStructEnd] value";
    indent_down();
  
    return out.str();
  }
  
  string t_st_generator::struct_reader(t_struct *tstruct, string clsName = "") {
    std::ostringstream out;
    const vector<t_field*>& fields = tstruct->get_members();
    vector<t_field*>::const_iterator fld_iter;
    string val = temp_name();
    string desc = temp_name();
    string found = temp_name();
  
    if (clsName.size() == 0) {
      clsName = tstruct->get_name();
    }
  
    out << "[|" << desc << " " << val << "|" << endl;
    indent_up();
  
    //This is nasty, but without it we'll break things by prefixing TResult.
    string name = ((capitalize(clsName) == "TResult") ? capitalize(clsName) : prefix(clsName));
    out << indent() << val << " := " << name << " new." << endl;
  
    out << indent() << "iprot readStructBegin." << endl <<
      indent() << "[" << desc << " := iprot readFieldBegin." << endl <<
      indent() << desc << " type = TType stop] whileFalse: [|" << found << "|" << endl;
    indent_up();
  
    for (fld_iter = fields.begin(); fld_iter != fields.end(); ++fld_iter) {
      out << indent() << desc << " id = " << (*fld_iter)->get_key() <<
        " ifTrue: [" << endl;
      indent_up();
  
      out << indent() << found << " := true." << endl <<
        indent() << val << " " << sanitize((*fld_iter)->get_name()) << ": " <<
        read_val((*fld_iter)->get_type());
      indent_down();
  
      out << "]." << endl;
    }
  
    out << indent() << found << " ifNil: [iprot skip: " << desc << " type]]." << endl;
    indent_down();
  
    out << indent() << "oprot readStructEnd." << endl <<
      indent() << val << "] value";
    indent_down();
  
    return out.str();
  }
  
  string t_st_generator::write_val(t_type *t, string fname) {
    t = t->get_true_type();
  
    if (t->is_base_type()) {
      t_base_type::t_base tbase = ((t_base_type*) t)->get_base();
      switch(tbase) {
      case t_base_type::TYPE_DOUBLE:
        return "iprot writeDouble: " + fname + " asFloat";
      case t_base_type::TYPE_BYTE:
      case t_base_type::TYPE_I16:
      case t_base_type::TYPE_I32:
      case t_base_type::TYPE_I64:
        return "iprot write" + capitalize(type_name(t)) + ": " + fname + " asInteger";
      default:
        return "iprot write" + capitalize(type_name(t)) + ": " + fname;
      }
    } else if (t->is_map()) {
      return map_writer((t_map*) t, fname);
    } else if (t->is_struct() || t->is_xception()) {
      return struct_writer((t_struct*) t, fname);
    } else if (t->is_list()) {
      return list_writer((t_list*) t, fname);
    } else if (t->is_set()) {
      return set_writer((t_set*) t, fname);
    } else if (t->is_enum()) {
      return "iprot writeI32: " + fname;
    } else {
      throw "Sorry, I don't know how to write this: " + type_name(t);
    }
  }
  
  string t_st_generator::read_val(t_type *t) {
    t = t->get_true_type();
  
    if (t->is_base_type()) {
      return "iprot read" + capitalize(type_name(t));
    } else if (t->is_map()) {
      return map_reader((t_map*) t);
    } else if (t->is_struct() || t->is_xception()) {
      return struct_reader((t_struct*) t);
    } else if (t->is_list()) {
      return list_reader((t_list*) t);
    } else if (t->is_set()) {
      return set_reader((t_set*) t);
    } else if (t->is_enum()) {
      return "iprot readI32";
    } else {
      throw "Sorry, I don't know how to read this: " + type_name(t);
    }
  }
  
  void t_st_generator::generate_send_method(t_function* function) {
    string funname = function->get_name();
    string signature = function_signature(function);
    t_struct* arg_struct = function->get_arglist();
    const vector<t_field*>& fields = arg_struct->get_members();
    vector<t_field*>::const_iterator fld_iter;
  
    st_method(f_, client_class_name(), "send" + capitalize(signature));
    f_ << "oprot writeMessageBegin:" << endl;
    indent_up();
  
    f_ << indent() << "(TCallMessage new" << endl;
    indent_up();
  
    f_ << indent() << "name: '" << funname << "'; " << endl <<
      indent() << "seqid: self nextSeqid)." << endl;
    indent_down();
    indent_down();
  
    f_ << indent() << "oprot writeStructBegin: " <<
      "(TStruct new name: '" + capitalize(function->get_name()) + "_args')." << endl;
  
    for (fld_iter = fields.begin(); fld_iter != fields.end(); ++fld_iter) {
      string fname = (*fld_iter)->get_name();
  
      f_ << indent() << "oprot writeFieldBegin: (TField new name: '" << fname <<
        "'; type: " << type_to_enum((*fld_iter)->get_type()) <<
        "; id: " << (*fld_iter)->get_key() << ")." << endl;
  
      f_ << indent() << write_val((*fld_iter)->get_type(), fname) << "." << endl <<
        indent() << "oprot writeFieldEnd." << endl;
    }
  
    f_ << indent() << "oprot writeFieldStop; writeStructEnd; writeMessageEnd." << endl;
    f_ << indent() << "oprot transport flush";
  
    st_close_method(f_);
  }
  
  // We only support receiving TResult structures (so this won't work on the server side)
  void t_st_generator::generate_recv_method(t_function* function) {
    string funname = function->get_name();
    string signature = function_signature(function);
  
    t_struct result(program_, "TResult");
    auto success =
        std::make_unique<t_field>(function->get_returntype(), "success", 0);
    result.append(std::move(success));
  
    t_struct* xs = function->get_xceptions();
    const vector<t_field*>& fields = xs->get_members();
    vector<t_field*>::const_iterator f_iter;
    for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
      // duplicate the field, but call it "exception"... we don't need a dynamic
      // name
      auto exception = std::make_unique<t_field>(
          (*f_iter)->get_type(), "exception", (*f_iter)->get_key());
      result.append(std::move(exception));
    }
  
    st_method(f_, client_class_name(), "recv" + capitalize(funname));
    f_ << "| f msg res | " << endl <<
      indent() << "msg := oprot readMessageBegin." << endl <<
      indent() << "self validateRemoteMessage: msg." << endl <<
      indent() << "res := " << struct_reader(&result) << "." << endl <<
      indent() << "oprot readMessageEnd." << endl <<
      indent() << "oprot transport flush." << endl <<
      indent() << "res exception ifNotNil: [res exception signal]." << endl <<
      indent() << "^ res";
    st_close_method(f_);
  }
  
  string t_st_generator::function_types_comment(t_function* fn) {
    std::ostringstream out;
    const vector<t_field*>& fields = fn->get_arglist()->get_members();
    vector<t_field*>::const_iterator f_iter;
  
    out << "\"";
  
    for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
      out << (*f_iter)->get_name() << ": " << type_name((*f_iter)->get_type());
      if ((f_iter + 1) != fields.end()) {
        out << ", ";
      }
    }
  
    out << "\"";
  
    return out.str();
  }
  
  /**
   * Generates a service client definition.
   *
   * @param tservice The service to generate a server for.
   */
  void t_st_generator::generate_service_client(t_service* tservice) {
    string extends = "";
    string extends_client = "TClient";
    vector<t_function*> functions = tservice->get_functions();
    vector<t_function*>::iterator f_iter;
  
    if (tservice->get_extends() != nullptr) {
      extends = type_name(tservice->get_extends());
      extends_client = extends + "Client";
    }
  
    f_ << extends_client << " subclass: #" << prefix(client_class_name()) << endl <<
      "\tinstanceVariableNames: ''\n" <<
      "\tclassVariableNames: ''\n" <<
      "\tpoolDictionaries: ''\n" <<
      "\tcategory: '" << generated_category() << "'!\n\n";
  
    for (f_iter = functions.begin(); f_iter != functions.end(); ++f_iter) {
      string funname = (*f_iter)->get_name();
      string signature = function_signature(*f_iter);
  
      st_method(f_, client_class_name(), signature);
      f_ << function_types_comment(*f_iter) << endl <<
        indent() << "self send" << capitalize(signature) << "." << endl;
  
      if (!(*f_iter)->is_oneway()) {
        f_ << indent() << "^ self recv" << capitalize(funname) << " success " << endl;
      }
  
      st_close_method(f_);
  
      generate_send_method(*f_iter);
      if (!(*f_iter)->is_oneway()) {
        generate_recv_method(*f_iter);
      }
    }
  }
  
  string t_st_generator::sanitize(string s) {
    std::ostringstream out;
    bool underscore = false;
  
    for (unsigned int i = 0; i < s.size(); i++) {
      if (s[i] == '_') {
        underscore = true;
        continue;
      }
      if (underscore) {
        out << (char) toupper(s[i]);
        underscore = false;
        continue;
      }
      out << s[i];
    }
  
    return out.str();
  }
  
  /**
   * Renders a function signature of the form 'type name(args)'
   *
   * @param tfunction Function definition
   * @return String of rendered function definition
   */
  string t_st_generator::function_signature(t_function* tfunction) {
    return tfunction->get_name() + capitalize(argument_list(tfunction->get_arglist()));
  }
  
  /**
   * Renders a field list
   */
  string t_st_generator::argument_list(t_struct* tstruct) {
    string result = "";
  
    const vector<t_field*>& fields = tstruct->get_members();
    vector<t_field*>::const_iterator f_iter;
    bool first = true;
    for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
      if (first) {
        first = false;
      } else {
        result += " ";
      }
      result += (*f_iter)->get_name() + ": " + (*f_iter)->get_name();
    }
    return result;
  }
  
  string t_st_generator::type_name(t_type* ttype) {
    string prefix = "";
    const t_program* program = ttype->get_program();
    if (program != nullptr && program != program_) {
      if (!ttype->is_service()) {
        prefix = program->get_name() + "_types.";
      }
    }
  
    string name = ttype->get_name();
    if (ttype->is_struct() || ttype->is_xception()) {
      name = capitalize(ttype->get_name());
    }
  
    return prefix + name;
  }
  
  /* Convert t_type to Smalltalk type code */
  string t_st_generator::type_to_enum(t_type* type) {
    type = type->get_true_type();
  
    if (type->is_base_type()) {
      t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
      switch (tbase) {
      case t_base_type::TYPE_VOID:
        throw "NO T_VOID CONSTRUCT";
      case t_base_type::TYPE_STRING:
      case t_base_type::TYPE_BINARY:
        return "TType string";
      case t_base_type::TYPE_BOOL:
        return "TType bool";
      case t_base_type::TYPE_BYTE:
        return "TType byte";
      case t_base_type::TYPE_I16:
        return "TType i16";
      case t_base_type::TYPE_I32:
        return "TType i32";
      case t_base_type::TYPE_I64:
        return "TType i64";
      case t_base_type::TYPE_FLOAT:
        return "TType float";
      case t_base_type::TYPE_DOUBLE:
        return "TType double";
      }
    } else if (type->is_enum()) {
      return "TType i32";
    } else if (type->is_struct() || type->is_xception()) {
      return "TType struct";
    } else if (type->is_map()) {
      return "TType map";
    } else if (type->is_set()) {
      return "TType set";
    } else if (type->is_list()) {
      return "TType list";
    }
  
    throw "INVALID TYPE IN type_to_enum: " + type->get_name();
  }
  
  
  THRIFT_REGISTER_GENERATOR(st, "Smalltalk", "");
  