column, placeholder and column_value generator progress

include/matador/query/fk_value_extractor.hpp

@@ -3,10 +3,13 @@
 
 #include "matador/utils/access.hpp"
 #include "matador/utils/field_attributes.hpp"
-#include "matador/utils/foreign_attributes.hpp"
 #include "matador/utils/primary_key_attribute.hpp"
 #include "matador/utils/types.hpp"
 
+namespace matador::utils {
+class foreign_attributes;
+}
+
 namespace matador::query::detail {
 
 class fk_value_extractor

include/matador/query/generator.hpp

@@ -0,0 +1,190 @@
+#ifndef MATADOR_GENERATOR_HPP
+#define MATADOR_GENERATOR_HPP
+
+#include <matador/utils/placeholder.hpp>
+#include <matador/utils/primary_key_attribute.hpp>
+#include <matador/utils/field_attributes.hpp>
+#include <matador/utils/foreign_attributes.hpp>
+
+#include "matador/query/fk_value_extractor.hpp"
+#include "matador/query/internal/column_value_pair.hpp"
+
+#include <vector>
+
+namespace matador::query::generator {
+class column_generator final {
+public:
+      template < class V >
+  void on_primary_key(const char *id, V &, const utils::primary_key_attribute& /*attr*/ = utils::default_pk_attributes) {
+      if (has_many_to_many_) {
+          return;
+      }
+      push(id);
+  }
+  void on_revision(const char *id, uint64_t &/*rev*/);
+
+  template<typename Type>
+  void on_attribute(const char *id, Type &, const utils::field_attributes &/*attr*/ = utils::null_attributes) {
+      if (has_many_to_many_) {
+          return;
+      }
+      push(id);
+  }
+
+  template<class Pointer>
+  void on_belongs_to(const char *id, Pointer &x, const utils::foreign_attributes &attr) {
+    on_foreign_key(id, x, attr);
+  }
+  template<class Pointer>
+  void on_has_one(const char *id, Pointer &x, const utils::foreign_attributes &attr) {
+    on_foreign_key(id, x, attr);
+  }
+
+  template<class ContainerType>
+  void on_has_many(const char * /*id*/, ContainerType &, const char *, const utils::foreign_attributes &attr) {
+    if (has_many_to_many_) {
+      return;
+    }
+    if (attr.fetch() == utils::fetch_type::LAZY || force_lazy_) {
+      return;
+    }
+    const auto info = table_schema_.info<typename ContainerType::value_type::value_type>();
+    if (!info) {
+      return;
+    }
+
+    if (seen_tables.count(info->get().name()) == 0) {
+      auto it = seen_tables.insert(info->get().name()).first;
+      table_name_stack_.push(info.value().get().name());
+      typename ContainerType::value_type::value_type obj;
+      access::process(*this, obj);
+      table_name_stack_.pop();
+      seen_tables.erase(it);
+    }
+  }
+
+  template<class ContainerType>
+  void on_has_many_to_many(const char * /*id*/, ContainerType & /*cont*/, const char *join_column, const char *inverse_join_column, const utils::foreign_attributes &/*attr*/) {
+    if (!has_many_to_many_) {
+      return;
+    }
+    push(join_column);
+    push(inverse_join_column);
+  }
+
+  template<class ContainerType>
+  static void on_has_many_to_many(const char * /*id*/, ContainerType & /*cont*/, const utils::foreign_attributes &/*attr*/) {}
+
+};
+class placeholder_generator final {
+public:
+  template< class Type >
+  std::vector<utils::placeholder> generate() {
+    Type obj;
+    return generate(obj);
+  }
+
+  template< class Type >
+  std::vector<utils::placeholder> generate(const Type &obj) {
+    result_.clear();
+    access::process(*this, obj);
+
+    return result_;
+  }
+
+  template < class V >
+  void on_primary_key(const char * /*id*/, V &/*x*/, const utils::primary_key_attribute& /*attr*/ = utils::default_pk_attributes) {
+    result_.emplace_back(utils::_);
+  }
+  void on_revision(const char *id, uint64_t &/*rev*/);
+
+  template<typename Type>
+  void on_attribute(const char * /*id*/, Type &/*x*/, const utils::field_attributes &/*attr*/ = utils::null_attributes) {
+    result_.emplace_back(utils::_);
+  }
+
+  template<class Type, template < class ... > class Pointer>
+  void on_belongs_to(const char * /*id*/, Pointer<Type> &/*x*/, const utils::foreign_attributes &/*attr*/) {
+    result_.emplace_back(utils::_);
+  }
+  template<class Type, template < class ... > class Pointer>
+  void on_has_one(const char * /*id*/, Pointer<Type> &/*x*/, const utils::foreign_attributes &/*attr*/) {
+    result_.emplace_back(utils::_);
+  }
+  template<class ContainerType>
+  static void on_has_many(const char *, ContainerType &, const char *, const char *, const utils::foreign_attributes &/*attr*/) {}
+
+private:
+    std::vector<utils::placeholder> result_;
+};
+
+class column_value_generator final {
+public:
+    template< class Type >
+    std::vector<internal::column_value_pair> generate() {
+        Type obj;
+        return generate(obj);
+    }
+
+    template< class Type >
+    std::vector<internal::column_value_pair> generate(const Type &obj) {
+        result_.clear();
+        access::process(*this, obj);
+
+        return result_;
+    }
+
+    template < class V >
+    void on_primary_key(const char *id, V &x, const utils::primary_key_attribute& /*attr*/ = utils::default_pk_attributes) {
+        result_.emplace_back(id, x);
+    }
+    void on_revision(const char *id, uint64_t &/*rev*/);
+
+    template<typename Type>
+    void on_attribute(const char *id, Type &x, const utils::field_attributes &/*attr*/ = utils::null_attributes) {
+        result_.emplace_back(id, x);
+    }
+
+    template<class Type, template < class ... > class Pointer>
+    void on_belongs_to(const char *id, Pointer<Type> &x, const utils::foreign_attributes &/*attr*/) {
+        result_.emplace_back(id, fk_value_extractor_.extract(*x));
+    }
+    template<class Type, template < class ... > class Pointer>
+    void on_has_one(const char *id, Pointer<Type> &x, const utils::foreign_attributes &/*attr*/) {
+        result_.emplace_back(id, fk_value_extractor_.extract(*x));
+    }
+    template<class ContainerType>
+    static void on_has_many(const char *, ContainerType &, const char *, const char *, const utils::foreign_attributes &/*attr*/) {}
+
+private:
+    detail::fk_value_extractor fk_value_extractor_{};
+    std::vector<internal::column_value_pair> result_;
+
+};
+
+template<typename Type>
+std::vector<utils::placeholder> placeholders() {
+  placeholder_generator generator;
+  return generator.generate<Type>();
+}
+
+template<typename Type>
+std::vector<utils::placeholder> placeholders(const Type &obj) {
+  placeholder_generator generator;
+  return generator.generate(obj);
+}
+
+template<typename Type>
+std::vector<internal::column_value_pair> column_value_pairs() {
+  column_value_generator generator;
+  return generator.generate<Type>();
+}
+
+template<typename Type>
+std::vector<internal::column_value_pair> column_value_pairs(const Type &obj) {
+  column_value_generator generator;
+  return generator.generate(obj);
+}
+
+}
+#endif //MATADOR_GENERATOR_HPP

include/matador/query/intermediates/query_update_intermediate.hpp

@@ -7,7 +7,7 @@
 
 #include "matador/query/key_value_generator.hpp"
 
-#include "matador/query/internal/key_value_pair.hpp"
+#include "matador/query/internal/column_value_pair.hpp"
 
 namespace matador::query {
 
@@ -15,8 +15,8 @@ class query_update_intermediate : public query_intermediate {
 public:
   explicit query_update_intermediate(const sql::table& table);
 
-  query_set_intermediate set(std::initializer_list<internal::key_value_pair> columns);
-  query_set_intermediate set(std::vector<internal::key_value_pair> &&columns);
+  query_set_intermediate set(std::initializer_list<internal::column_value_pair> columns);
+  query_set_intermediate set(std::vector<internal::column_value_pair> &&columns);
   template<class Type>
   query_set_intermediate set() {
     Type obj;

include/matador/query/internal/column_value_pair.hpp

@@ -8,12 +8,12 @@
 
 namespace matador::query::internal {
 
-class key_value_pair {
+class column_value_pair {
 public:
-  key_value_pair(const sql::column &col, utils::database_type value);
-  key_value_pair(std::string name, utils::database_type value);
-  key_value_pair(const char *name, utils::database_type value);
-  key_value_pair(const char *name, utils::placeholder p);
+  column_value_pair(const sql::column &col, utils::database_type value);
+  column_value_pair(std::string name, utils::database_type value);
+  column_value_pair(const char *name, utils::database_type value);
+  column_value_pair(const char *name, utils::placeholder p);
 
   [[nodiscard]] const std::string& name() const;
   [[nodiscard]] const std::variant<utils::placeholder, utils::database_type>& value() const;

include/matador/query/internal/query_parts.hpp

@@ -4,7 +4,7 @@
 #include "matador/query/query_part_visitor.hpp"
 #include "matador/query/criteria.hpp"
 
-#include "matador/query/internal/key_value_pair.hpp"
+#include "matador/query/internal/column_value_pair.hpp"
 #include "matador/query/query_part.hpp"
 
 #include "matador/sql/column.hpp"
@@ -318,15 +318,15 @@ private:
 class query_set_part final : public query_part
 {
 public:
-  explicit query_set_part(const std::vector<internal::key_value_pair>& key_value_pairs);
+  explicit query_set_part(const std::vector<internal::column_value_pair>& key_value_pairs);
 
-  [[nodiscard]] const std::vector<internal::key_value_pair>& key_values() const;
+  [[nodiscard]] const std::vector<internal::column_value_pair>& key_values() const;
 
 private:
   void accept(query_part_visitor &visitor) override;
 
 private:
-  std::vector<internal::key_value_pair> key_value_pairs_;
+  std::vector<internal::column_value_pair> key_value_pairs_;
 };
 
 class query_delete_part final : public query_part

include/matador/query/key_value_generator.hpp

@@ -2,7 +2,7 @@
 #define QUERY_KEY_VALUE_GENERATOR_HPP
 
 #include "matador/query/fk_value_extractor.hpp"
-#include "matador/query/internal/key_value_pair.hpp"
+#include "matador/query/internal/column_value_pair.hpp"
 
 #include "matador/utils/foreign_attributes.hpp"
 #include "matador/utils/primary_key_attribute.hpp"
@@ -15,12 +15,12 @@ class key_value_generator
 {
 private:
 public:
-  explicit key_value_generator(std::vector<internal::key_value_pair> &result);
+  explicit key_value_generator(std::vector<internal::column_value_pair> &result);
 
 public:
   template < class Type >
-  static std::vector<internal::key_value_pair> generate(const Type &obj) {
-    std::vector<internal::key_value_pair> result;
+  static std::vector<internal::column_value_pair> generate(const Type &obj) {
+    std::vector<internal::column_value_pair> result;
     key_value_generator generator(result);
     access::process(generator, obj);
 
@@ -51,7 +51,7 @@ public:
 
 private:
   detail::fk_value_extractor fk_value_extractor_{};
-  std::vector<internal::key_value_pair> &result_;
+  std::vector<internal::column_value_pair> &result_;
 };
 
 }