From 8dd9efa88da99f602a6848731a115f10ec3a5b31 Mon Sep 17 00:00:00 2001 From: Eugen Wissner Date: Sat, 9 May 2026 10:28:52 +0200 Subject: Convert the backend to modules --- backend/utils.cpp | 250 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 250 insertions(+) create mode 100644 backend/utils.cpp (limited to 'backend/utils.cpp') diff --git a/backend/utils.cpp b/backend/utils.cpp new file mode 100644 index 0000000..086fa42 --- /dev/null +++ b/backend/utils.cpp @@ -0,0 +1,250 @@ +/* + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at https://mozilla.org/MPL/2.0/. + */ +module; + +#include +#include +#include +#include +#include +#include + +export module katja.utils; + +export namespace katja +{ +enum class Info +{ + // Error. + unknown, + // Installed in the same version. + installed, + // A different version is installed. + updating, + // Available, but not installed. + installing, + // Available. + available +}; + +struct JobData +{ + sqlite3 *db; + CURL *curl; + + virtual void package(Info info, const char *package_id, const char *summary) = 0; + virtual void files(char **) = 0; + virtual void details(char *package_id, + const char *group, const char *description, const char *homepage, int uncompressed) = 0; + virtual void set_percentage(double) = 0; +}; + +/** + * katja::get_file: + * @curl: curl easy handle. + * @source_url: source url. + * @dest: destination. + * + * Download the file. + * + * Returns: CURLE_OK (zero) on success, non-zero otherwise. + **/ +CURLcode get_file(CURL **curl, char *source_url, char *dest) +{ + char *dest_dir_name; + FILE *fout = nullptr; + CURLcode ret; + glong response_code; + + if ((*curl == nullptr) && (!(*curl = curl_easy_init()))) + { + return CURLE_BAD_FUNCTION_ARGUMENT; + } + + curl_easy_setopt(*curl, CURLOPT_FOLLOWLOCATION, 1L); + curl_easy_setopt(*curl, CURLOPT_URL, source_url); + + if (dest == nullptr) + { + curl_easy_setopt(*curl, CURLOPT_NOBODY, 1L); + curl_easy_setopt(*curl, CURLOPT_HEADER, 1L); + ret = curl_easy_perform(*curl); + curl_easy_getinfo(*curl, CURLINFO_RESPONSE_CODE, &response_code); + + if (response_code != 200) + { + ret = CURLE_REMOTE_FILE_NOT_FOUND; + } + } + else + { + if (g_file_test(dest, G_FILE_TEST_IS_DIR)) + { + dest_dir_name = dest; + dest = g_strconcat(dest_dir_name, g_strrstr(source_url, "/"), nullptr); + g_free(dest_dir_name); + } + if ((fout = fopen(dest, "ab")) == nullptr) + { + return CURLE_WRITE_ERROR; + } + curl_easy_setopt(*curl, CURLOPT_WRITEDATA, fout); + ret = curl_easy_perform(*curl); + } + curl_easy_reset(*curl); + if (fout != nullptr) + { + fclose(fout); + } + return ret; +} + +/** + * katja::split_package_name: + * Got the name of a package, without version-arch-release data. + **/ +char **split_package_name(const char *pkg_filename) +{ + char *pkg_full_name; + char **pkg_tokens; + + g_return_val_if_fail(pkg_filename != nullptr, nullptr); + + int len = strlen(pkg_filename); + if (len < 4) + { + return nullptr; + } + + if (pkg_filename[len - 4] == '.') + { + pkg_tokens = static_cast(g_malloc_n (6, sizeof (char *))); + + /* Full name without extension */ + len -= 4; + pkg_full_name = g_strndup(pkg_filename, len); + pkg_tokens[3] = g_strdup(pkg_full_name); + + /* The last 3 characters should be the file extension */ + pkg_tokens[4] = g_strdup(pkg_filename + len + 1); + pkg_tokens[5] = nullptr; + } + else + { + pkg_tokens = static_cast(g_malloc_n (4, sizeof (char *))); + pkg_full_name = g_strdup(pkg_filename); + pkg_tokens[3] = nullptr; + } + + /* Reverse all of the bytes in the package filename to get the name, version and the architecture */ + g_strreverse (pkg_full_name); + char **reversed_tokens = g_strsplit(pkg_full_name, "-", 4); + pkg_tokens[0] = g_strreverse(reversed_tokens[3]); /* Name */ + pkg_tokens[1] = g_strreverse(reversed_tokens[2]); /* Version */ + pkg_tokens[2] = g_strreverse(reversed_tokens[1]); /* Architecture */ + + g_free(reversed_tokens[0]); /* Build number */ + g_free(reversed_tokens); + g_free(pkg_full_name); + + return pkg_tokens; +} + +/** + * katja::is_installed: + * Checks if a package is already installed in the system. + * + * @pkg_fullname: Package name should be looked for. + * + * Returns: Package installation information. + **/ +Info is_installed(const char *pkg_fullname) +{ + GFileEnumerator *pkg_metadata_enumerator; + GFileInfo *pkg_metadata_file_info; + GFile *pkg_metadata_dir; + Info ret = Info::installing; + const char *it; + std::uint8_t dashes = 0; + ptrdiff_t pkg_name; + + g_return_val_if_fail(pkg_fullname != nullptr, Info::unknown); + + // We want to find the package name without version for the package we're + // looking for. + g_debug("Looking if %s is installed", pkg_fullname); + + for (it = pkg_fullname + strlen(pkg_fullname); it != pkg_fullname; --it) + { + if (*it == '-') + { + if (dashes == 2) + { + break; + } + ++dashes; + } + } + if (dashes < 2) + { + return Info::unknown; + } + pkg_name = it - pkg_fullname; + + // Read the package metadata directory and comprare all installed packages + // with ones in the cache. + pkg_metadata_dir = g_file_new_for_path("/var/log/packages"); + if (!(pkg_metadata_enumerator = g_file_enumerate_children(pkg_metadata_dir, + "standard::name", + G_FILE_QUERY_INFO_NONE, + nullptr, + nullptr))) + { + g_object_unref(pkg_metadata_dir); + return Info::unknown; + } + + while ((pkg_metadata_file_info = g_file_enumerator_next_file(pkg_metadata_enumerator, nullptr, nullptr))) + { + const char *dir = g_file_info_get_name(pkg_metadata_file_info); + dashes = 0; + + if (strcmp(dir, pkg_fullname) == 0) + { + ret = Info::installed; + } + else + { + for (it = dir + strlen(dir); it != dir; --it) + { + if (*it == '-') + { + if (dashes == 2) + { + break; + } + ++dashes; + } + } + if (pkg_name == (it - dir) && strncmp(pkg_fullname, dir, pkg_name) == 0) + { + ret = Info::updating; + } + } + g_object_unref(pkg_metadata_file_info); + + if (ret != Info::installing) /* If installed */ + { + break; + } + } + g_object_unref(pkg_metadata_enumerator); + g_object_unref(pkg_metadata_dir); + + return ret; +} + +} -- cgit v1.2.3