From e43a759d866882a8cd500133dd5e3e20d5fe3d45 Mon Sep 17 00:00:00 2001
From: Michael Tremer <michael.tremer@ipfire.org>
Date: Mon, 3 Feb 2025 10:28:32 +0000
Subject: [PATCH] repos: Add a new object to parse the metadata into

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---
 src/pakfire/repo.c | 68 ++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 63 insertions(+), 5 deletions(-)

diff --git a/src/pakfire/repo.c b/src/pakfire/repo.c
index 2be82477..5a6d5af8 100644
--- a/src/pakfire/repo.c
+++ b/src/pakfire/repo.c
@@ -60,6 +60,14 @@
 
 #define MAX_DESCRIPTION 4096
 
+struct pakfire_repomd {
+	// Version
+	int64_t version;
+
+	// Revision
+	int64_t revision;
+};
+
 struct pakfire_repo_appdata {
 	// Reference Counter
 	int nrefs;
@@ -759,6 +767,50 @@ ERROR:
 	return r;
 }
 
+static int pakfire_repo_parse_repomd(struct pakfire_repo* self,
+		struct pakfire_repomd* repomd, const struct pakfire_buffer* buffer) {
+	struct json_object* root = NULL;
+	int r;
+
+	// Parse JSON from buffer
+	root = pakfire_json_parse(self->ctx, buffer->data, buffer->length);
+	if (!root) {
+		r = -EBADMSG;
+		goto ERROR;
+	}
+
+	// Parse version
+	r = pakfire_json_get_int64(root, "version", &repomd->version);
+	if (r < 0)
+		goto ERROR;
+
+	// Check if we support this version
+	switch (repomd->version) {
+		case 0:
+			break;
+
+		default:
+			ERROR(self->ctx, "Unsupported version of repository metadata: %ld\n", repomd->version);
+			r = -ENOTSUP;
+			goto ERROR;
+	}
+
+	DEBUG(self->ctx, "Parsing repository metadata in version %ld\n", repomd->version);
+
+	// Parse revision
+	r = pakfire_json_get_int64(root, "revision", &repomd->revision);
+	if (r < 0)
+		goto ERROR;
+
+	// XXX There is more to do here...
+
+ERROR:
+	if (root)
+		json_object_put(root);
+
+	return r;
+}
+
 static int pakfire_repo_verify_metadata(
 		struct pakfire_repo* self, const struct pakfire_buffer* repomd) {
 	struct pakfire_buffer signature = {};
@@ -812,7 +864,8 @@ ERROR:
 }
 
 static int pakfire_repo_download_metadata(struct pakfire_repo* repo, const char* path, int force) {
-	struct pakfire_buffer repomd = {};
+	struct pakfire_repomd repomd = {};
+	struct pakfire_buffer buffer = {};
 	struct pakfire_xfer* xfer = NULL;
 	int r;
 
@@ -851,7 +904,7 @@ static int pakfire_repo_download_metadata(struct pakfire_repo* repo, const char*
 		goto ERROR;
 
 	// Set the output path
-	r = pakfire_xfer_set_output_buffer(xfer, &repomd.data, &repomd.length);
+	r = pakfire_xfer_set_output_buffer(xfer, &buffer.data, &buffer.length);
 	if (r < 0)
 		goto ERROR;
 
@@ -862,16 +915,21 @@ static int pakfire_repo_download_metadata(struct pakfire_repo* repo, const char*
 
 	// Verify the downloaded data
 	if (repo->appdata->key) {
-		r = pakfire_repo_verify_metadata(repo, &repomd);
+		r = pakfire_repo_verify_metadata(repo, &buffer);
 		if (r < 0)
 			goto ERROR;
 	}
 
+	// Parse the metadata
+	r = pakfire_repo_parse_repomd(repo, &repomd, &buffer);
+	if (r < 0)
+		goto ERROR;
+
 ERROR:
 	if (xfer)
 		pakfire_xfer_unref(xfer);
-	if (repomd.data)
-		free(repomd.data);
+	if (buffer.data)
+		free(buffer.data);
 
 	return r;
 }
-- 
2.39.5