ENH: Allow insertion and deletion of single entities

Summary

See https://gitlab.indiscale.com/caosdb/customers/lfpb/management/-/issues/394. Implementations for entities, parents, and properties were added. The transactions were extended s.th. all objects can be inserted, retrieved, and deleted.

Focus

Most of the new stuff is in entity.cpp and entity.h. See test_entity for the new functionality.

Test Environment

Unit and integration tests should be sufficient.

Check List for the Author

Please, prepare your MR for a review. Be sure to write a summary and a focus and create gitlab comments for the reviewer. They should guide the reviewer through the changes, explain your changes and also point out open questions. For further good practices have a look at our review guidelines

• All automated tests pass
• Reference related Issues
• [ ] Up-to-date CHANGELOG.md
• Annotations in code (Gitlab comments)
  • Intent of new code
  • Problems with old code
  • Why this implementation?

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• [ ] Up-to-date CHANGELOG.md
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there spezifications? Are they satisfied?

For further good practices have a look at our review guidelines.

include/caosdb/entity.h

@@ -36,8 +36,15 @@
 namespace caosdb::entity {
 using caosdb::entity::v1alpha1::IdResponse;
 using ProtoParent = caosdb::entity::v1alpha1::Parent;
+using ProtoProperty = caosdb::entity::v1alpha1::Property;
 using ProtoEntity = caosdb::entity::v1alpha1::Entity;
 
+/**
+ * Messages convey information about the state and result of transactions.
+ *
+ * A Message object can be thought of as kinf of a generalized error object in
+ * other frameworks. Please have a look at MessageCodes for more details.
+ */
 class Message {
 public:
   [[nodiscard]] inline auto GetCode() const -> MessageCode {
@@ -48,6 +55,10 @@ public:
   }
 
   friend class Entity;
+  // TODO(fspreck) Re-enable once we have decided how messages are
+  // appended to parents and properties
+  // friend class Parent;
+  // friend class Property;
   friend class Messages;
 
 private:
@@ -68,6 +79,9 @@ public:
   }
 
   friend class Entity;
+  // TODO(fspreck) Same here.
+  // friend class Parent;
+  // friend class Property;
 
 private:
   inline Messages() : wrapped(nullptr){};
@@ -128,20 +142,32 @@ public:
     return out;
   }
 
-  // TODO(fspreck) These need implementations. See Entity::GetErrors for
-  // inspiration.
-  /**
-   * Return the error messages of this parent.
-   */
-  [[nodiscard]] inline auto GetErrors() const -> const Messages &;
-  /**
-   * Return the warning messages of this parent.
-   */
-  [[nodiscard]] inline auto GetWarnings() const -> const Messages &;
-  /**
-   * Return the info messages of this parent.
-   */
-  [[nodiscard]] inline auto GetInfos() const -> const Messages &;
+  // TODO(fspreck) Finish the following implementations once we have
+  // decided how to attach messages to parents.
+  // /**
+  //  * Return the error messages of this parent.
+  //  */
+  // [[nodiscard]] inline auto GetErrors() const -> const Messages & {
+  //   return errors;
+  // }
+  // [[nodiscard]] inline auto HasErrors() const -> bool {
+  //   return this->errors.wrapped->size() > 0;
+  // }
+  // /**
+  //  * Return the warning messages of this parent.
+  //  */
+  // [[nodiscard]] inline auto GetWarnings() const -> const Messages & {
+  //   return warnings;
+  // }
+  // [[nodiscard]] inline auto HasWarnings() const -> bool {
+  //   return this->warnings.wrapped->size() > 0;
+  // }
+  // /**
+  //  * Return the info messages of this parent.
+  //  */
+  // [[nodiscard]] inline auto GetInfos() const -> const Messages & {
+  //   return infos;
+  // }
 
   friend class Entity;
   friend class Parents;
@@ -163,6 +189,9 @@ private:
    * Message which serves as storage backend.
    */
   mutable caosdb::entity::v1alpha1::Parent *wrapped;
+  // Messages errors;
+  // Messages warnings;
+  // Messages infos;
 };
 
 /**
@@ -213,38 +242,93 @@ private:
  *
  * This is a property which belongs to another entity. Don't confuse it with
  * an Entity with the "Property" role.
- *
- * @brief Property of an Entity.
  */
 class Property {
 public:
   explicit inline Property(caosdb::entity::v1alpha1::Property *wrapped)
     : wrapped(wrapped){};
+  Property();
 
-  // TODO(fspreck) All of these methods need implementations.
+  /**
+   * Return the id of this  property
+   */
   [[nodiscard]] auto GetId() const -> const std::string &;
+  /**
+   * Return the name of this  property
+   */
   [[nodiscard]] auto GetName() const -> const std::string &;
+  /**
+   * Return the description of this  property
+   */
   [[nodiscard]] auto GetDescription() const -> const std::string &;
+  /**
+   * Return the importance of this  property
+   */
   [[nodiscard]] auto GetImportance() const -> const std::string &;
+  /**
+   * Return the value of this  property
+   */
   [[nodiscard]] auto GetValue() const -> const std::string &;
+  /**
+   * Return the unit of this  property
+   */
   [[nodiscard]] auto GetUnit() const -> const std::string &;
+  /**
+   * Return the datatype of this  property
+   */
   [[nodiscard]] auto GetDatatype() const -> const std::string &;
-  [[nodiscard]] auto GetErrors() const -> const Messages &;
-  [[nodiscard]] auto GetWarnings() const -> const Messages &;
-  [[nodiscard]] auto GetInfos() const -> const Messages &;
+  // TODO(fspreck) Implement these when we have decided how to attach
+  // messages to properties.
+  // [[nodiscard]] auto GetErrors() const -> const Messages &;
+  // [[nodiscard]] auto GetWarnings() const -> const Messages &;
+  // [[nodiscard]] auto GetInfos() const -> const Messages &;
 
+  /**
+   * Set the id of this property.
+   */
   auto SetId(const std::string &id) -> void;
+  /**
+   * Set the name of this property.
+   */
   auto SetName(const std::string &name) -> void;
+  /**
+   * Set the importance of this property.
+   */
   auto SetImportance(const std::string &importance) -> void;
+  /**
+   * Set the value of this property.
+   */
   auto SetValue(const std::string &value) -> void;
+  /**
+   * Set the unit of this property.
+   */
   auto SetUnit(const std::string &unit) -> void;
+  /**
+   * Set the datatype of this property.
+   */
   auto SetDatatype(const std::string &datatype) -> void;
 
+  /**
+   * Return a json string representing this property.
+   *
+   * This is intended for debugging
+   */
+  inline auto ToString() const -> const std::string {
+    google::protobuf::util::JsonOptions options;
+    std::string out;
+    google::protobuf::util::MessageToJsonString(*(this->wrapped), &out,
+                                                options);
+
+    return out;
+  }
+
   friend class Entity;
   friend class Properties;
 
 private:
-  caosdb::entity::v1alpha1::Property *wrapped;
+  static auto CreateProtoProperty() -> ProtoProperty *;
+
+  mutable caosdb::entity::v1alpha1::Property *wrapped;
 };
 
 /**
@@ -254,10 +338,18 @@ private:
  */
 class Properties {
 public:
-  // TODO(fspreck) Implementations needed (basically everything). See Parents
-  // container for inspiration.
-  [[nodiscard]] auto At(int index) const -> const Property &;
-  auto Append(const Property &property) -> void;
+  /**
+   * Return the current size of the properties container.
+   *
+   * This is also the number of properties the owningn entity currently has.
+   */
+  [[nodiscard]] inline auto Size() const -> int { return wrapped->size(); }
+  /**
+   * Return the property at the given index.
+   */
+  [[nodiscard]] auto At(int index) const -> const Property {
+    return Property(&(wrapped->at(index)));
+  }
 
   friend class Entity;
 
@@ -268,6 +360,13 @@ private:
       *wrapped)
     : wrapped(wrapped){};
 
+  /**
+   * Append a property
+   *
+   * This increases the Size() by one.
+   */
+  auto Append(const Property &property) -> void;
+
   ::google::protobuf::RepeatedPtrField<caosdb::entity::v1alpha1::Property>
     *wrapped;
 };
@@ -310,6 +409,9 @@ public:
   [[nodiscard]] inline auto GetUnit() const -> const std::string & {
     return wrapped->unit();
   };
+  [[nodiscard]] inline auto GetValue() const -> const std::string & {
+    return wrapped->value();
+  };
 
   [[nodiscard]] auto GetParents() const -> const Parents &;
   [[nodiscard]] auto GetProperties() const -> const Properties &;
@@ -322,6 +424,9 @@ public:
   [[nodiscard]] auto GetWarnings() const -> const Messages & {
     return warnings;
   }
+  [[nodiscard]] inline auto HasWarnings() const -> bool {
+    return this->warnings.wrapped->size() > 0;
+  }
   [[nodiscard]] auto GetInfos() const -> const Messages & { return infos; }
 
   inline auto ToString() const -> const std::string {
@@ -337,12 +442,10 @@ public:
   auto SetName(const std::string &name) -> void;
   auto SetVersionId(const std::string &id) -> void;
 
-  // TODO(fspreck) ... and also these
   auto SetValue(const std::string &value) -> void;
   auto SetUnit(const std::string &unit) -> void;
   // Currently no references or lists.
   auto SetDatatype(const std::string &datatype) -> void;
-  // TODO(fspreck) this one is tricky. See AppendParent
   auto AppendProperty(const Property &property) -> void;
 
   auto AppendParent(const Parent &parent) -> void;