Plan app export targets in app core

src/app_core/document_export.h

@@ -0,0 +1,111 @@
+#pragma once
+
+#include "foundation/result.h"
+
+#include <string>
+#include <string_view>
+#include <utility>
+
+namespace pp::app {
+
+struct DocumentExportFileTarget {
+    std::string path;
+    std::string suggested_name;
+};
+
+struct DocumentExportCollectionTarget {
+    std::string directory;
+    std::string stem_path;
+};
+
+struct DocumentExportStemTarget {
+    std::string stem_path;
+};
+
+struct DocumentExportSuggestedName {
+    std::string name;
+};
+
+[[nodiscard]] inline pp::foundation::Result<DocumentExportFileTarget> make_document_export_file_target(
+    std::string_view work_directory,
+    std::string_view document_name,
+    std::string_view extension)
+{
+    if (document_name.empty()) {
+        return pp::foundation::Result<DocumentExportFileTarget>::failure(
+            pp::foundation::Status::invalid_argument("document name must not be empty"));
+    }
+
+    if (extension.empty()) {
+        return pp::foundation::Result<DocumentExportFileTarget>::failure(
+            pp::foundation::Status::invalid_argument("extension must not be empty"));
+    }
+
+    DocumentExportFileTarget target;
+    target.suggested_name.reserve(document_name.size() + extension.size());
+    target.suggested_name += document_name;
+    target.suggested_name += extension;
+    target.path.reserve(work_directory.size() + target.suggested_name.size() + 1);
+    target.path += work_directory;
+    target.path += "/";
+    target.path += target.suggested_name;
+    return pp::foundation::Result<DocumentExportFileTarget>::success(std::move(target));
+}
+
+[[nodiscard]] inline pp::foundation::Result<DocumentExportCollectionTarget> make_document_export_collection_target(
+    std::string_view work_directory,
+    std::string_view document_name,
+    std::string_view suffix)
+{
+    if (document_name.empty()) {
+        return pp::foundation::Result<DocumentExportCollectionTarget>::failure(
+            pp::foundation::Status::invalid_argument("document name must not be empty"));
+    }
+
+    DocumentExportCollectionTarget target;
+    target.directory.reserve(work_directory.size() + document_name.size() + suffix.size() + 1);
+    target.directory += work_directory;
+    target.directory += "/";
+    target.directory += document_name;
+    target.directory += suffix;
+    target.stem_path.reserve(target.directory.size() + document_name.size() + 1);
+    target.stem_path += target.directory;
+    target.stem_path += "/";
+    target.stem_path += document_name;
+    return pp::foundation::Result<DocumentExportCollectionTarget>::success(std::move(target));
+}
+
+[[nodiscard]] inline pp::foundation::Result<DocumentExportStemTarget> make_document_export_stem_target(
+    std::string_view directory,
+    std::string_view document_name)
+{
+    if (document_name.empty()) {
+        return pp::foundation::Result<DocumentExportStemTarget>::failure(
+            pp::foundation::Status::invalid_argument("document name must not be empty"));
+    }
+
+    DocumentExportStemTarget target;
+    target.stem_path.reserve(directory.size() + document_name.size() + 1);
+    target.stem_path += directory;
+    target.stem_path += "/";
+    target.stem_path += document_name;
+    return pp::foundation::Result<DocumentExportStemTarget>::success(std::move(target));
+}
+
+[[nodiscard]] inline pp::foundation::Result<DocumentExportSuggestedName> make_document_export_suggested_name(
+    std::string_view document_name,
+    std::string_view suffix)
+{
+    if (document_name.empty()) {
+        return pp::foundation::Result<DocumentExportSuggestedName>::failure(
+            pp::foundation::Status::invalid_argument("document name must not be empty"));
+    }
+
+    DocumentExportSuggestedName target;
+    target.name.reserve(document_name.size() + suffix.size());
+    target.name += document_name;
+    target.name += suffix;
+    return pp::foundation::Result<DocumentExportSuggestedName>::success(std::move(target));
+}
+
+}