1 files changed, 38 insertions, 0 deletions
diff --git a/src/timezone.cc b/src/timezone.cc
new file mode 100644
index 0000000..ca0f501
--- /dev/null
+++ b/src/timezone.cc
@@ -0,0 +1,38 @@
+#include "common.hh"
+
+#include "geo_json.hh"
+#include "timezone.hh"
+#include "tz_info.hh"
+
+namespace {
+
+class TimezoneImpl : public Timezone {
+public:
+  TimezoneImpl(std::shared_ptr<Logger> logger,
+               std::filesystem::path geojsondb,
+               std::filesystem::path tzinfo_dir)
+    : geojson_(GeoJson::create(logger, std::move(geojsondb))),
+      tzinfo_(TzInfo::create(logger, std::move(tzinfo_dir))) {
+  }
+
+  std::optional<time_t> get_local_time(double lat, double lng,
+                                       time_t utc_time) const override {
+    auto tzid = geojson_->get_data(lat, lng, "tzid");
+    if (tzid.has_value())
+      return tzinfo_->get_local_time(tzid.value(), utc_time);
+    return std::nullopt;
+  }
+
+private:
+  std::unique_ptr<GeoJson> geojson_;
+  std::unique_ptr<TzInfo> tzinfo_;
+};
+
+}  // namespace
+
+std::unique_ptr<Timezone> Timezone::create(std::shared_ptr<Logger> logger,
+                                           std::filesystem::path geojsondb,
+                                           std::filesystem::path tzinfo_dir) {
+  return std::make_unique<TimezoneImpl>(std::move(logger), std::move(geojsondb),
+                                        std::move(tzinfo_dir));
+}