docs: add JavaDocs

application/src/main/java/org/togetherjava/tjbot/config/CakeDayConfig.java

@@ -2,6 +2,9 @@
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+/**
+ * Configuration record for the Cake Day feature.
+ */
 public record CakeDayConfig(
         @JsonProperty(value = "rolePattern", required = true) String rolePattern) {
 }

application/src/main/java/org/togetherjava/tjbot/config/Config.java

@@ -409,7 +409,11 @@ public String getSelectRolesChannelPattern() {
         return selectRolesChannelPattern;
     }
 
-    // TODO: Add JavaDoc
+    /**
+     * Retrieves the Cake Day configuration.
+     *
+     * @return the cake-day feature configuration
+     */
     public CakeDayConfig getCakeDayConfig() {
         return cakeDayConfig;
     }

application/src/main/java/org/togetherjava/tjbot/features/basic/CakeDayRoutine.java

@@ -29,6 +29,12 @@
 
 import static org.togetherjava.tjbot.db.generated.tables.CakeDays.CAKE_DAYS;
 
+/**
+ * Represents a routine for managing cake day celebrations.
+ * <p>
+ * This routine handles the assignment and removal of a designated cake day role to guild members
+ * based on their anniversary of joining the guild.
+ */
 public class CakeDayRoutine implements Routine {
 
     private static final Logger logger = LoggerFactory.getLogger(CakeDayRoutine.class);
@@ -39,31 +45,24 @@ public class CakeDayRoutine implements Routine {
     private final CakeDayConfig config;
     private final Database database;
 
+    /**
+     * Constructs a new {@link CakeDayRoutine} instance.
+     *
+     * @param config the configuration for cake day routines
+     * @param database the database for accessing cake day data
+     */
     public CakeDayRoutine(Config config, Database database) {
         this.config = config.getCakeDayConfig();
         this.database = database;
 
         this.cakeDayRolePredicate = Pattern.compile(this.config.rolePattern()).asPredicate();
     }
 
-    /**
-     * Retrieves the schedule of this routine. Called by the core system once during the startup in
-     * order to execute the routine accordingly.
-     * <p>
-     * Changes on the schedule returned by this method afterwards will not be picked up.
-     *
-     * @return the schedule of this routine
-     */
     @Override
     public Schedule createSchedule() {
         return new Schedule(ScheduleMode.FIXED_RATE, 0, 1, TimeUnit.DAYS);
     }
 
-    /**
-     * Triggered by the core system on the schedule defined by {@link #createSchedule()}.
-     *
-     * @param jda the JDA instance the bot is operating with
-     */
     @Override
     public void runRoutine(JDA jda) {
         if (getCakeDayCount(this.database) == 0) {
@@ -89,6 +88,14 @@ public void runRoutine(JDA jda) {
         jda.getGuilds().forEach(this::reassignCakeDayRole);
     }
 
+    /**
+     * Reassigns the cake day role for all members of the given guild.
+     * <p>
+     * If the cake day role is not found based on the configured pattern, a warning message is
+     * logged, and no action is taken.
+     *
+     * @param guild the guild for which to reassign the cake day role
+     */
     private void reassignCakeDayRole(Guild guild) {
         Role cakeDayRole = getCakeDayRoleFromGuild(guild).orElse(null);
 
@@ -103,6 +110,16 @@ private void reassignCakeDayRole(Guild guild) {
             .join();
     }
 
+    /**
+     * Asynchronously adds the specified cake day role to guild members who are celebrating their
+     * cake day today.
+     * <p>
+     * The cake day role is added to members who have been in the guild for at least one year.
+     *
+     * @param cakeDayRole the cake day role to add to qualifying members
+     * @param guild the guild in which to add the cake day role to members
+     * @return a {@link CompletableFuture} representing the asynchronous operation
+     */
     private CompletableFuture<Void> addTodayMembersCakeDayRole(Role cakeDayRole, Guild guild) {
         return CompletableFuture
             .runAsync(() -> findCakeDaysTodayFromDatabase().forEach(cakeDayRecord -> {
@@ -115,26 +132,67 @@ private CompletableFuture<Void> addTodayMembersCakeDayRole(Role cakeDayRole, Gui
             }));
     }
 
+    /**
+     * Removes the specified cake day role from all members who possess it in the given guild
+     * asynchronously.
+     *
+     * @param cakeDayRole The cake day role to be removed from members.
+     * @param guild The guild from which to remove the cake day role.
+     * @return A CompletableFuture representing the asynchronous operation.
+     */
     private CompletableFuture<Void> removeMembersCakeDayRole(Role cakeDayRole, Guild guild) {
         return CompletableFuture.runAsync(() -> guild.findMembersWithRoles(cakeDayRole)
             .onSuccess(members -> removeRoleFromMembers(guild, cakeDayRole, members)));
     }
 
+
+    /**
+     * Removes a specified role from a list of members in a guild.
+     *
+     * @param guild the guild from which to remove the role from members
+     * @param role the role to be removed from the members
+     * @param members the list of members from which the role will be removed
+     */
     private void removeRoleFromMembers(Guild guild, Role role, List<Member> members) {
         members.forEach(member -> {
             UserSnowflake snowflake = UserSnowflake.fromId(member.getIdLong());
             guild.removeRoleFromMember(snowflake, role).complete();
         });
     }
 
+    /**
+     * Retrieves the count of cake days from the provided database.
+     * <p>
+     * This uses the table <b>cake_days</b> to find the answer.
+     *
+     * @param database the database from which to retrieve the count of cake days
+     * @return the count of cake days stored in the database
+     */
     private int getCakeDayCount(Database database) {
         return database.read(context -> context.fetchCount(CAKE_DAYS));
     }
 
+    /**
+     * Populates cake days for all guilds in the provided JDA instance.
+     * <p>
+     * This method iterates through all guilds in the provided JDA instance and populates cake days
+     * for each guild. It is primarily used for batch populating the <b>cake_days</b> table once it
+     * is found to be empty.
+     *
+     * @param jda the JDA instance containing the guilds to populate cake days for
+     */
     private void populateAllGuildCakeDays(JDA jda) {
         jda.getGuilds().forEach(this::batchPopulateGuildCakeDays);
     }
 
+    /**
+     * Batch populates guild cake days for the given guild.
+     * <p>
+     * Uses a buffer for all the queries it makes and its size is determined by the
+     * {@code BULK_INSERT_SIZE} option.
+     *
+     * @param guild the guild for which to populate cake days
+     */
     private void batchPopulateGuildCakeDays(Guild guild) {
         final List<Query> queriesBuffer = new ArrayList<>();
 
@@ -155,6 +213,18 @@ private void batchPopulateGuildCakeDays(Guild guild) {
         }
     }
 
+    /**
+     * Creates a query to insert a member's cake day information into the database.
+     * <p>
+     * Primarily used for manually constructing queries for members' cake days which are called from
+     * {@link CakeDayRoutine#batchPopulateGuildCakeDays(Guild)} and added in a batch to be sent to
+     * the database.
+     *
+     * @param member the member whose cake day information is to be inserted
+     * @param guildId the ID of the guild to which the member belongs
+     * @return an Optional containing the query to insert cake day information if the member has a
+     *         join time; empty Optional otherwise
+     */
     private Optional<Query> createMemberCakeDayQuery(Member member, long guildId) {
         if (!member.hasTimeJoined()) {
             return Optional.empty();
@@ -170,13 +240,24 @@ private Optional<Query> createMemberCakeDayQuery(Member member, long guildId) {
             .set(CAKE_DAYS.USER_ID, member.getIdLong()));
     }
 
+    /**
+     * Retrieves the cake day {@link Role} from the specified guild.
+     *
+     * @param guild the guild from which to retrieve the cake day role
+     * @return an optional containing the cake day role if found, otherwise empty
+     */
     private Optional<Role> getCakeDayRoleFromGuild(Guild guild) {
         return guild.getRoles()
             .stream()
             .filter(role -> cakeDayRolePredicate.test(role.getName()))
             .findFirst();
     }
 
+    /**
+     * Finds cake days records for today from the database.
+     *
+     * @return a list of {@link CakeDaysRecord} objects representing cake days for today
+     */
     private List<CakeDaysRecord> findCakeDaysTodayFromDatabase() {
         String todayMonthDay = OffsetDateTime.now().format(MONTH_DAY_FORMATTER);