2 files changed, 164 insertions, 0 deletions
diff --git a/bot/src/api/kick.cpp b/bot/src/api/kick.cpp
new file mode 100644
index 0000000..9b64f48
--- /dev/null
+++ b/bot/src/api/kick.cpp
@@ -0,0 +1,125 @@
+#include "api/kick.hpp"
+
+#include <chrono>
+#include <stdexcept>
+#include <string>
+#include <thread>
+#include <vector>
+
+#include "cpr/api.h"
+#include "cpr/cprtypes.h"
+#include "cpr/response.h"
+#include "logger.hpp"
+#include "nlohmann/json.hpp"
+#include "nlohmann/json_fwd.hpp"
+#include "utils/chrono.hpp"
+#include "utils/string.hpp"
+
+namespace bot::api {
+  std::vector<KickChannel> parse_json_channels(const nlohmann::json &value) {
+    if (!value.contains("data")) {
+      log::warn("api/kick", "No data object in Kick API get_channels response");
+      return {};
+    }
+
+    std::vector<KickChannel> channels;
+    nlohmann::json d = value["data"];
+
+    for (const nlohmann::json &c : d) {
+      channels.push_back(
+          {c["broadcaster_user_id"], c["slug"], c["stream_title"],
+           c["category"]["name"], c["stream"]["is_live"],
+           utils::chrono::string_to_time_point(c["stream"]["start_time"],
+                                               "%Y-%m-%dT%H:%M:%SZ")});
+    }
+
+    return channels;
+  }
+
+  std::vector<KickChannel> KickAPIClient::get_channels(
+      const std::vector<int> &ids) const {
+    if (this->authorization_key.empty()) {
+      log::error("api/kick", "You must be authorized before using Kick API");
+      return {};
+    }
+
+    if (ids.empty()) {
+      return {};
+    }
+
+    cpr::Response r = cpr::Get(
+        cpr::Url{this->base_url + "/public/v1/channels?broadcaster_user_id=" +
+                 utils::string::str(ids.begin(), ids.end(), ',')},
+        cpr::Header{{"Authorization", "Bearer " + this->authorization_key}});
+
+    if (r.status_code != 200) {
+      log::error("api/kick", "Failed to get Kick channels. Status code: " +
+                                 std::to_string(r.status_code));
+      return {};
+    }
+
+    nlohmann::json j = nlohmann::json::parse(r.text);
+    return parse_json_channels(j);
+  }
+
+  std::vector<KickChannel> KickAPIClient::get_channels(
+      const std::string &slug) const {
+    if (this->authorization_key.empty()) {
+      log::error("api/kick", "You must be authorized before using Kick API");
+      return {};
+    }
+
+    if (slug.empty()) {
+      return {};
+    }
+
+    cpr::Response r = cpr::Get(
+        cpr::Url{this->base_url + "/public/v1/channels?slug=" + slug},
+        cpr::Header{{"Authorization", "Bearer " + this->authorization_key}});
+
+    if (r.status_code != 200) {
+      log::error("api/kick", "Failed to get Kick channels. Status code: " +
+                                 std::to_string(r.status_code));
+      return {};
+    }
+
+    nlohmann::json j = nlohmann::json::parse(r.text);
+    return parse_json_channels(j);
+  }
+
+  void KickAPIClient::authorize() {
+    cpr::Response r = cpr::Post(
+        cpr::Url{"https://id.kick.com/oauth/"
+                 "token?grant_type=client_credentials&client_id=" +
+                 this->client_id + "&client_secret=" + this->client_secret});
+
+    if (r.status_code != 200) {
+      throw std::runtime_error(
+          "Failed to authorize in Kick API. Status code: " +
+          std::to_string(r.status_code));
+    }
+
+    nlohmann::json j = nlohmann::json::parse(r.text);
+
+    this->authorization_key = j["access_token"];
+    this->expires_in = j["expires_in"];
+    this->token_acquired_timestamp = std::time(nullptr);
+
+    log::info("api/kick", "Successfully authorized in Kick API!");
+  }
+
+  void KickAPIClient::refresh_token_thread() {
+    while (true) {
+      std::this_thread::sleep_for(std::chrono::seconds(60));
+      if (this->client_id.empty() || this->client_secret.empty()) {
+        break;
+      } else if (std::time(nullptr) - this->token_acquired_timestamp <
+                 this->expires_in - 300) {
+        continue;
+      }
+
+      log::info("api/kick", "Kick token is going to expire. Refreshing...");
+      this->authorize();
+    }
+  }
+}
+\ No newline at end of file
diff --git a/bot/src/api/kick.hpp b/bot/src/api/kick.hpp
new file mode 100644
index 0000000..9b29b24
--- /dev/null
+++ b/bot/src/api/kick.hpp
@@ -0,0 +1,39 @@
+#pragma once
+
+#include <chrono>
+#include <string>
+#include <vector>
+
+namespace bot::api {
+  struct KickChannel {
+      int broadcaster_user_id;
+      std::string slug, stream_title, stream_game_name;
+      bool is_live;
+      std::chrono::system_clock::time_point start_time;
+  };
+
+  class KickAPIClient {
+    public:
+      KickAPIClient(const std::string &client_id,
+                    const std::string &client_secret)
+          : client_id(client_id), client_secret(client_secret) {
+        this->authorize();
+      };
+
+      ~KickAPIClient() = default;
+
+      std::vector<KickChannel> get_channels(const std::vector<int> &ids) const;
+      std::vector<KickChannel> get_channels(const std::string &slug) const;
+
+      void refresh_token_thread();
+
+    private:
+      void authorize();
+
+      std::string authorization_key;
+      int expires_in;
+      long token_acquired_timestamp;
+      const std::string base_url = "https://api.kick.com", client_id,
+                        client_secret;
+  };
+}
+\ No newline at end of file