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samples/mongo_service/mongo_service.cpp
namespace samples::mongodb {
class Translations final : public server::handlers::HttpHandlerBase {
public:
static constexpr std::string_view kName = "handler-translations";
Translations(const components::ComponentConfig& config,
: HttpHandlerBase(config, context),
pool_(context.FindComponent<components::Mongo>("mongo-tr").GetPool()) {}
std::string HandleRequestThrow(
const server::http::HttpRequest& request,
if (request.GetMethod() == server::http::HttpMethod::kPatch) {
InsertNew(request);
return {};
} else {
return ReturnDiff(request);
}
}
private:
void InsertNew(const server::http::HttpRequest& request) const;
std::string ReturnDiff(const server::http::HttpRequest& request) const;
storages::mongo::PoolPtr pool_;
};
} // namespace samples::mongodb
namespace samples::mongodb {
void Translations::InsertNew(const server::http::HttpRequest& request) const {
const auto& key = request.GetArg("key");
const auto& lang = request.GetArg("lang");
const auto& value = request.GetArg("value");
auto transl = pool_->GetCollection("translations");
transl.InsertOne(MakeDoc("key", key, "lang", lang, "value", value));
request.SetResponseStatus(server::http::HttpStatus::kCreated);
}
std::string Translations::ReturnDiff(
const server::http::HttpRequest& request) const {
auto time_point = std::chrono::system_clock::time_point{};
if (request.HasArg("last_update")) {
const auto& update_time = request.GetArg("last_update");
time_point = utils::datetime::Stringtime(update_time);
}
namespace options = storages::mongo::options;
auto transl = pool_->GetCollection("translations");
auto cursor = transl.Find(
MakeDoc("_id",
options::Sort{std::make_pair("_id", options::Sort::kAscending)});
if (!cursor) {
return "{}";
}
auto content = vb["content"];
for (const auto& doc : cursor) {
const auto key = doc["key"].As<std::string>();
const auto lang = doc["lang"].As<std::string>();
content[key][lang] = doc["value"].As<std::string>();
last = doc;
}
vb["update_time"] = utils::datetime::Timestring(
last["_id"].As<formats::bson::Oid>().GetTimePoint());
return ToString(vb.ExtractValue());
}
} // namespace samples::mongodb
int main(int argc, char* argv[]) {
const auto component_list = components::MinimalServerComponentList()
.Append<components::Mongo>("mongo-tr")
.Append<samples::mongodb::Translations>();
return utils::DaemonMain(argc, argv, component_list);
}