Check status of sent messages.
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@ -47,6 +47,15 @@ struct message {
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struct user from; ///< Info on the peer who sent the message.
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};
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/**
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* @brief Status of a message.
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*/
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enum {
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NC_PENDING = 1, ///< Status of message is pending.
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NC_GOOD = 2, ///< Message was sent properly.
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NC_BAD = 3, ///< Message failed to send.
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};
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/**
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* @brief Initialize a local DHT node. If port is 0 then the default port
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* number will be used.
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@ -137,10 +146,23 @@ void NeoComm_free_message(struct message *msg);
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* @param channel_name Name of the channel to send the message to.
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* @param message A message to send to the channel.
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*
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* @return 1 upon success, 0 upon failure. Use NeoComm_get_last_error for a
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* text description of the error.
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* @return Upon success it returns the time that the message was sent which
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* can be used as a token to see if the message was sent properly using
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* NeoComm_check_message, if the function failed then 0 will be returned.
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*/
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int NeoComm_send_message(const char *channel_name, const char *message);
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time_t NeoComm_send_message(const char *channel_name, const char *message);
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/**
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* @brief Check the status of a sent message.
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*
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* @param token The token of a message to check its status.
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*
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* @return The status of the message (NC_GOOD, NC_BAD, or NC_PENDING). If the
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* token does not exist then 0 is returned.
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*
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* @warning Once checked the token becomes invalid.
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*/
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int NeoComm_check_message(const time_t token);
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/**
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* @brief Get the last error that occurred in text.
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@ -23,9 +23,11 @@
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std::map<std::string, struct channel_info> channels;
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static std::mt19937_64 rand_dev {dht::crypto::random_device{}()};
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static std::mt19937_64 rand_dev { dht::crypto::random_device{}() };
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static std::uniform_int_distribution<dht::Value::Id> rand_id;
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static std::map<time_t, int> sent_messages;
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int NeoComm_join_channel(const char *channel_name) {
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if(not node.isRunning())
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{
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@ -54,7 +56,7 @@ int NeoComm_join_channel(const char *channel_name) {
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channels[s_chan_name] = {
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/*.hash =*/ chan_hash,
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/*.token =*/ node.listen<dht::ImMessage>(chan_hash,
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[=](dht::ImMessage &&msg) {
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[&](dht::ImMessage &&msg) {
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channels[s_chan_name].msgs.push_back(msg);
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return true;
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}),
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@ -98,7 +100,12 @@ void NeoComm_free_message(struct message *msg) {
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free(msg);
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}
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int NeoComm_send_message(const char *channel_name, const char *message) {
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time_t NeoComm_send_message(const char *channel_name, const char *message) {
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if(not node.isRunning())
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{
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add_error("NeoComm must be initialized.");
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return 0;
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}
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const dht::InfoHash chan_hash = channels[channel_name].hash;
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const time_t now =
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std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
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@ -108,10 +115,21 @@ int NeoComm_send_message(const char *channel_name, const char *message) {
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add_error("Not connected to channel");
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return 0;
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}
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sent_messages[now] = NC_PENDING;
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node.putSigned(chan_hash,
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dht::ImMessage(rand_id(rand_dev), message, now), [](bool sent) {
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// TODO: Figure out what to do here for failed messages.
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dht::ImMessage(rand_id(rand_dev), message, now), [&](bool sent) {
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sent_messages[now] = sent ? NC_GOOD : NC_BAD;
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});
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return 1;
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return now;
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}
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int NeoComm_check_message(const time_t token) {
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if(sent_messages.find(token) == sent_messages.end())
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{
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add_error("No message found with that token.");
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return 0;
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}
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const int status = sent_messages[token];
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sent_messages.erase(token);
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return status;
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}
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