diff options
author | Sybren A. Stüvel <sybren@blender.org> | 2021-08-02 12:02:47 +0300 |
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committer | Sybren A. Stüvel <sybren@blender.org> | 2021-08-02 12:08:02 +0300 |
commit | 1f0d6f763573b22772dcdb61320a12e1c11949e0 (patch) | |
tree | 03f68b9e777d507b3aeeb21fac35a172f32b95fa /source/blender/blenkernel/intern/asset_catalog.cc | |
parent | 3fd5c93f9ce805b1a59bb6a03a9d39767697e336 (diff) |
Asset Catalogs: loading a catalog definition file
Initial, limited implementation of loading a single asset catalog
definition file. These files are structured as follows:
CATALOG_ID virtual/path/of/catalog
SUBCATALOG_ID virtual/path/of/catalog/child
SOMETHING_ELSE some/unrelated/hierarchy
These virtual paths will be used to show the catalog in a tree
structure; the tree structure itself is not part of this commit. Each
asset will have one catalog ID that determines where in that tree the
asset shows up.
Currently only a single catalog definition file can be read; merging
data from multiple such files, and writing them out again after changes
are made, is for future commits.
This commit only contains the code to load a single file, and unittests
to check that this actually works. No UI, no user-facing functionality
yet.
Diffstat (limited to 'source/blender/blenkernel/intern/asset_catalog.cc')
-rw-r--r-- | source/blender/blenkernel/intern/asset_catalog.cc | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/asset_catalog.cc b/source/blender/blenkernel/intern/asset_catalog.cc new file mode 100644 index 00000000000..0139b7a4abf --- /dev/null +++ b/source/blender/blenkernel/intern/asset_catalog.cc @@ -0,0 +1,148 @@ +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +/** \file + * \ingroup bke + */ + +#include "BKE_asset_catalog.hh" + +#include "BLI_string_ref.hh" + +#include <filesystem> +#include <fstream> + +namespace fs = std::filesystem; + +namespace blender::bke { + +AssetCatalogService::AssetCatalogService() +{ +} + +AssetCatalog *AssetCatalogService::find_catalog(const CatalogID &catalog_id) +{ + std::unique_ptr<AssetCatalog> *catalog_uptr_ptr = this->catalogs.lookup_ptr(catalog_id); + if (catalog_uptr_ptr == nullptr) { + return nullptr; + } + return catalog_uptr_ptr->get(); +} + +void AssetCatalogService::load_from_disk(const CatalogFilePath &asset_library_root) +{ + fs::file_status status = fs::status(asset_library_root); + switch (status.type()) { + case fs::file_type::regular: + load_single_file(asset_library_root); + break; + case fs::file_type::directory: + load_directory_recursive(asset_library_root); + break; + default: + // TODO(@sybren): throw an appropriate exception. + return; + } +} + +void AssetCatalogService::load_directory_recursive(const CatalogFilePath & /*directory_path*/) +{ + // TODO(@sybren): implement +} + +void AssetCatalogService::load_single_file(const CatalogFilePath &catalog_definition_file_path) +{ + std::unique_ptr<AssetCatalogDefinitionFile> cdf = parse_catalog_file( + catalog_definition_file_path); + + BLI_assert_msg(!this->catalog_definition_file, + "Only loading of a single catalog definition file is supported."); + this->catalog_definition_file = std::move(cdf); +} + +std::unique_ptr<AssetCatalogDefinitionFile> AssetCatalogService::parse_catalog_file( + const CatalogFilePath &catalog_definition_file_path) +{ + auto cdf = std::make_unique<AssetCatalogDefinitionFile>(); + cdf->file_path = catalog_definition_file_path; + + std::fstream infile(catalog_definition_file_path); + std::string line; + while (std::getline(infile, line)) { + const StringRef trimmed_line = StringRef(line).trim().trim(path_separator); + if (trimmed_line.is_empty() || trimmed_line[0] == '#') { + continue; + } + + std::unique_ptr<AssetCatalog> catalog = this->parse_catalog_line(trimmed_line, cdf.get()); + + const bool is_catalog_id_reused_in_file = cdf->catalogs.contains(catalog->catalog_id); + /* The AssetDefinitionFile should include this catalog when writing it back to disk, even if it + * was a duplicate. */ + cdf->catalogs.add_new(catalog->catalog_id, catalog.get()); + + if (is_catalog_id_reused_in_file) { + std::cerr << catalog_definition_file_path << ": multiple definitions of catalog " + << catalog->catalog_id << ", using first occurrence." << std::endl; + /* Don't store 'catalog'; unique_ptr will free its memory. */ + continue; + } + + if (this->catalogs.contains(catalog->catalog_id)) { + // TODO(@sybren): apparently another CDF was already loaded. This is not supported yet. + std::cerr << catalog_definition_file_path << ": multiple definitions of catalog " + << catalog->catalog_id << " in multiple files, ignoring this one." << std::endl; + /* Don't store 'catalog'; unique_ptr will free its memory. */ + continue; + } + + /* The AssetCatalog pointer is owned by the AssetCatalogService. */ + this->catalogs.add_new(catalog->catalog_id, std::move(catalog)); + } + + return cdf; +} + +std::unique_ptr<AssetCatalog> AssetCatalogService::parse_catalog_line( + const StringRef line, const AssetCatalogDefinitionFile *catalog_definition_file) +{ + const int64_t first_space = line.find_first_of(' '); + if (first_space == StringRef::not_found) { + std::cerr << "Invalid line in " << catalog_definition_file->file_path << ": " << line + << std::endl; + return std::unique_ptr<AssetCatalog>(nullptr); + } + + const StringRef catalog_id = line.substr(0, first_space); + const StringRef catalog_path = line.substr(first_space + 1).trim().trim(path_separator); + + return std::make_unique<AssetCatalog>(catalog_id, catalog_path); +} + +AssetCatalogDefinitionFile::AssetCatalogDefinitionFile() +{ +} + +AssetCatalog::AssetCatalog() +{ +} + +AssetCatalog::AssetCatalog(const CatalogID &catalog_id, const CatalogPath &path) + : catalog_id(catalog_id), path(path) +{ +} + +} // namespace blender::bke |