add archive_expires_after option

src/utils/parse_duration.cpp

@@ -0,0 +1,36 @@
+#include <cstdio>
+#include <optional>
+#include <stdexcept>
+#include <string>
+#include <unordered_map>
+#include <utils/parse_duration.hpp>
+
+namespace utils {
+
+// Strongly inspired from prosody
+// https://hg.prosody.im/trunk/file/0ff11f2e87cd/util/human/io.lua#l214
+static const long day = 86400;
+
+static const std::unordered_map<std::string, long> multipliers = {
+    {"d", day}, {"w", day * 7}, {"mon", day * 31}, {"y", day * 365.2425},
+    {"s", 1},   {"min", 60},    {"h", 3600},       {"ho", 3600},
+};
+
+std::optional<long> parse_duration(const std::string &duration) {
+  std::size_t ptr;
+  long number;
+  try {
+    number = std::stol(duration, &ptr, 10);
+  } catch (std::invalid_argument &) {
+    return {};
+  }
+  const std::string m = duration.substr(ptr);
+
+  if (!multipliers.contains(m))
+    return {};
+
+  const long multiplier = multipliers.at(m);
+
+  return multiplier * number;
+}
+} // namespace utils

src/utils/parse_duration.hpp

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <optional>
+#include <string>
+
+namespace utils {
+std::optional<long> parse_duration(const std::string &duration);
+} // namespace utils