Move downloader to lib/downloader

lib/downloader/stats.go

@@ -0,0 +1,59 @@
+// This file is Free Software under the Apache-2.0 License
+// without warranty, see README.md and LICENSES/Apache-2.0.txt for details.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// SPDX-FileCopyrightText: 2023 German Federal Office for Information Security (BSI) <https://www.bsi.bund.de>
+// Software-Engineering: 2023 Intevation GmbH <https://intevation.de>
+
+package downloader
+
+import "log/slog"
+
+// stats contains counters of the downloads.
+type stats struct {
+	downloadFailed  int
+	filenameFailed  int
+	schemaFailed    int
+	remoteFailed    int
+	sha256Failed    int
+	sha512Failed    int
+	signatureFailed int
+	succeeded       int
+}
+
+// add adds other stats to this.
+func (st *stats) add(o *stats) {
+	st.downloadFailed += o.downloadFailed
+	st.filenameFailed += o.filenameFailed
+	st.schemaFailed += o.schemaFailed
+	st.remoteFailed += o.remoteFailed
+	st.sha256Failed += o.sha256Failed
+	st.sha512Failed += o.sha512Failed
+	st.signatureFailed += o.signatureFailed
+	st.succeeded += o.succeeded
+}
+
+func (st *stats) totalFailed() int {
+	return st.downloadFailed +
+		st.filenameFailed +
+		st.schemaFailed +
+		st.remoteFailed +
+		st.sha256Failed +
+		st.sha512Failed +
+		st.signatureFailed
+}
+
+// log logs the collected stats.
+func (st *stats) log() {
+	slog.Info("Download statistics",
+		"succeeded", st.succeeded,
+		"total_failed", st.totalFailed(),
+		"filename_failed", st.filenameFailed,
+		"download_failed", st.downloadFailed,
+		"schema_failed", st.schemaFailed,
+		"remote_failed", st.remoteFailed,
+		"sha256_failed", st.sha256Failed,
+		"sha512_failed", st.sha512Failed,
+		"signature_failed", st.signatureFailed)
+}