Start implementing yaml loading

src/main/java/wtf/beatrice/hidekobot/Cache.java

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+package wtf.beatrice.hidekobot;
+
+import net.dv8tion.jda.api.interactions.commands.Command;
+import org.jetbrains.annotations.Nullable;
+import wtf.beatrice.hidekobot.database.DatabaseManager;
+import wtf.beatrice.hidekobot.listeners.MessageLogger;
+
+import java.awt.*;
+import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+
+public class Cache
+{
+
+
+    private static DatabaseManager dbManager = null;
+    private static boolean verbose = false;
+    private static MessageLogger verbosityLogger;
+    private static final long botMaintainerId = 979809420714332260L;
+    private static long botOwnerId = 0L;
+
+    private final static String expiryTimestampFormat = "yy/MM/dd HH:mm:ss";
+
+    // note: discord sets interactions' expiry time to 15 minutes by default, so we can't go higher than that.
+    private final static long expiryTimeSeconds = 15L;
+
+    // used to count eg. uptime
+    private static LocalDateTime startupTime;
+
+    // todo: allow people to set their own url
+    private static final String heartbeatLink = "https://status.beatrice.wtf/api/push/%apikey%?status=up&msg=OK&ping=";
+    private static String heartbeatApiKey = "";
+
+
+    private static final String botVersion = "0.1.5-slash"; // we should probably find a way to make this consistent with Maven
+    private static final String botName = "HidekoBot";
+    private static final Color botColor = Color.PINK;
+
+    private static List<Command> registeredCommands = new ArrayList<>();
+
+    private final static String defaultInviteLink =
+            "https://discord.com/api/oauth2/authorize?client_id=%userid%&scope=bot+applications.commands&permissions=8";
+
+    private static String botApplicationId = "";
+
+    // discord api returns a broken image if you don't use specific sizes (powers of 2), so we limit it to these
+    private static final int[] supportedAvatarResolutions = { 16, 32, 64, 128, 256, 512, 1024 };
+
+    /**
+     * Get an array of all the Discord-supported avatar resolutions.
+     * Discord's API returns a broken image if you don't use specific sizes (powers of 2).
+     *
+     * @return array of supported resolutions.
+     */
+    public static int[] getSupportedAvatarResolutions() { return supportedAvatarResolutions; }
+
+    /**
+     * Checks if the bot has been started with the verbose argument.
+     *
+     * @return a boolean which is true if the bot is in verbose-mode
+     */
+    public static boolean isVerbose() { return verbose; }
+
+    /**
+     * Set the bot's verbosity status at runtime.
+     * This also registers or unregisters the message-logger listener.
+     *
+     * @param v the verbosity boolean value
+     */
+    public static void setVerbose(boolean v)
+    {
+        verbose = v;
+
+        if(v)
+        {
+            if(verbosityLogger == null)
+            {
+                verbosityLogger = new MessageLogger();
+            }
+
+            HidekoBot.getAPI().addEventListener(verbosityLogger);
+        } else {
+            if(verbosityLogger != null)
+            {
+                HidekoBot.getAPI().removeEventListener(verbosityLogger);
+                verbosityLogger = null;
+            }
+        }
+    }
+
+    /**
+     * Get the bot owner's profile id.
+     *
+     * @return a long of the account's id
+     */
+    public static long getBotOwnerId() { return botOwnerId; }
+
+    /**
+     * Get the bot maintainer's profile id.
+     *
+     * @return a long of the account's id
+     */
+    
+    public static long getBotMaintainerId() { return botMaintainerId; }
+
+    /**
+     * Set the bot's application id.
+     *
+     * @param id the bot's application id
+     */
+    public static void setBotApplicationId(String id)
+    {
+        botApplicationId = id;
+    }
+
+    /**
+     * Get the bot's application id
+     *
+     * @return a string of the bot's application id
+     */
+    public static String getBotApplicationId() { return botApplicationId; }
+
+    /**
+     * Function to generate an invite link for the bot
+     *
+     * @return a string containing the invite link
+     */
+    public static String getInviteUrl() {
+        return defaultInviteLink.replace("%userid%", botApplicationId);
+    }
+
+    /**
+     * Set the already fully-initialized DatabaseManager instance, ready to be accessed and used.
+     *
+     * @param databaseManagerInstance the fully-initialized DatabaseManager instance.
+     */
+    public static void setDatabaseManagerInstance(DatabaseManager databaseManagerInstance)
+    {
+        dbManager = databaseManagerInstance;
+    }
+
+    /**
+     * Get the fully-initialized DatabaseManager instance, ready to be used.
+     *
+     * @return the DatabaseManager instance.
+     */
+    public static @Nullable DatabaseManager getDatabaseManager() { return dbManager; }
+
+    /**
+     * Get the DateTimeFormatter string for parsing the expired messages timestamp.
+     *
+     * @return the String of the DateTimeFormatter format.
+     */
+    public static String getExpiryTimestampFormat(){ return  expiryTimestampFormat; }
+
+    /**
+     * Get the amount of seconds after which a message expires.
+     *
+     * @return long value of the expiry seconds.
+     */
+    public static long getExpiryTimeSeconds() { return expiryTimeSeconds; }
+
+
+    public static String getBotName() { return botName; };
+
+    /**
+     * Get the bot's version.
+     *
+     * @return a String of the bot version.
+     */
+    public static String getBotVersion() { return botVersion; }
+
+    /**
+     * Get the bot's global color.
+     *
+     * @return the Color object.
+     */
+    public static Color getBotColor() { return botColor; }
+
+    /**
+     * Set the list of registered commands. They will be sorted alphabetically.
+     *
+     * @param commands a list of registered commands.
+     */
+    public static void setRegisteredCommands(List<Command> commands)
+    {
+
+        // sort alphabetically by field getName()
+        List<Command> tempList = commands
+                .stream()
+                .sorted(Comparator.comparing(Command::getName))
+                .toList();
+
+        registeredCommands = new ArrayList<>(tempList);
+    }
+
+    /**
+     * Get a list of all bot registered commands, sorted alphabetically.
+     *
+     * @return a copy of the List.
+     */
+    public static List<Command> getRegisteredCommands()
+    {
+        return new ArrayList<>(registeredCommands);
+    }
+
+    /**
+     * Set the bot's startup time. Generally only used at boot time.
+     *
+     * @param time a LocalDateTime of the startup moment.
+     */
+    public static void setStartupTime(LocalDateTime time)
+    { startupTime = time; }
+
+
+    /**
+     * Get the time of when the bot was started up.
+     *
+     * @return a LocalDateTime object of the startup instant.
+     */
+    public static LocalDateTime getStartupTime() { return startupTime; }
+
+    public static String getFullHeartBeatLink() {
+        return heartbeatLink.replace("%apikey%", heartbeatApiKey);
+    }
+    //todo javadocs
+    public static void setHeartBeatApiKey(String key) {
+        heartbeatApiKey = key;
+    }
+    public static String getHeartBeatApiKey() {
+        return heartbeatApiKey;
+    }
+
+}