01-07

src/01_basics/07_cache/CMakeLists.txt

@@ -0,0 +1,15 @@
+cmake_minimum_required(VERSION 3.28)
+project(dppbots)
+set(example_name "01_07_cache")
+message("Setting up ${example_name}")
+add_executable(${example_name} "${CMAKE_CURRENT_SOURCE_DIR}/src/main.cpp")
+target_include_directories(${example_name} PUBLIC
+    "${dpp_SOURCE_DIR}/include"
+    "${dotenv-cpp_SOURCE_DIR}/include/laserpants"
+
+)
+target_link_libraries(${example_name}
+    dpp
+    dotenv
+)
+SET_OUTPUT_NAMES(${example_name})

src/01_basics/07_cache/src/main.cpp

@@ -0,0 +1,58 @@
+#include <cache.h>
+#include <cluster.h>
+#include <intents.h>
+#include <misc-enum.h>
+
+#include <cstdlib>
+#include <iostream>
+#include <string>
+
+#include "dotenv.h"
+
+int main() {
+    // Load the .env into the environment
+    dotenv::init();
+    // Make sure the DISCORD_TOKEN environment var exists
+    if (!std::getenv("DISCORD_TOKEN")) {
+        std::cout << "Failed to get DISCORD_TOKEN from .env or the environment."
+                  << std::endl;
+        exit(EXIT_FAILURE);
+    }
+    // Get the bot token from DISCORD_TOKEN
+    std::string botToken = std::getenv("DISCORD_TOKEN");
+
+    // Create the bot, passing in our token as well as the intents
+    dpp::cluster bot(botToken, dpp::i_default_intents | dpp::i_guild_members);
+
+    // Create a lamba as a callback for when a reaction is removed
+    bot.on_message_reaction_remove(
+        [&bot](const dpp::message_reaction_remove_t& event) {
+            // Get the user from the cache.
+            // More then just users are cached, you can use the following
+            // functions to interact with it
+            // dpp::find_role()
+            // dpp::find_channel()
+            // dpp::find_guild()
+            // dpp::find_guild_member()
+            // dpp::find_user()
+            dpp::user* reacting_user = dpp::find_user(event.reacting_user_id);
+
+            // Make sure the user was actually found in the cache
+            if (!reacting_user) {
+                bot.log(dpp::ll_info,
+                        "User with id " +
+                            std::to_string(event.reacting_user_id) +
+                            " was not found.");
+                return;
+            }
+            // Log the action, using their username that we grabbed from the
+            // cache
+            bot.log(dpp::ll_info, reacting_user->format_username() +
+                                      " removed their reaction.");
+        });
+
+    // Start the bot
+    bot.start(dpp::st_wait);
+
+    return 0;
+}