Added initial structure for include diagram generation

src/include_diagram/model/diagram.cc

@@ -0,0 +1,65 @@
+/**
+ * src/include_diagram/model/diagram.cc
+ *
+ * Copyright (c) 2021-2022 Bartek Kryza <bkryza@gmail.com>
+ *
+ * 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 "diagram.h"
+
+#include "util/error.h"
+#include "util/util.h"
+
+namespace clanguml::include_diagram::model {
+
+common::model::diagram_t diagram::type() const
+{
+    return common::model::diagram_t::kPackage;
+}
+
+type_safe::optional_ref<const common::model::diagram_element> diagram::get(
+    const std::string &full_name) const
+{
+    return get_file(full_name);
+}
+
+void diagram::add_file(std::unique_ptr<include_diagram::model::source_file> &&f)
+{
+    LOG_DBG("Adding source file: {}, {}", f->name(), f->full_name(true));
+
+    files_.emplace_back(*f);
+
+    add_element(f->path(), std::move(f));
+}
+
+type_safe::optional_ref<const include_diagram::model::source_file>
+diagram::get_file(const std::string &name) const
+{
+    for (const auto &p : files_) {
+        if (p.get().full_name(false) == name) {
+            return {p};
+        }
+    }
+
+    return type_safe::nullopt;
+}
+
+std::string diagram::to_alias(const std::string &full_name) const
+{
+    LOG_DBG("Looking for alias for {}", full_name);
+
+    return full_name;
+}
+
+}