add waitlist

eladmin-system/src/main/resources/db/migration/V11__add_event_tags.sql

@@ -1,4 +1,6 @@
 -- Add tags column to event table
 ALTER TABLE event
-    add column poster_image varchar(255),
+    ADD COLUMN poster_image VARCHAR(255),
-    ADD COLUMN tags         VARCHAR(255) NULL COMMENT 'Tags stored as comma-delimited string';
+    ADD COLUMN tags VARCHAR(255) NULL COMMENT 'Tags stored as comma-delimited string',
+    ADD COLUMN current_participants INT DEFAULT 0 COMMENT 'Current number of participants',
+    ADD COLUMN max_participants INT NULL COMMENT 'Maximum number of participants';

eladmin-system/src/main/resources/db/migration/V13__create_wait_list.sql

@@ -0,0 +1,18 @@
+-- Create wait list table for tracking players waiting to join events
+CREATE TABLE IF NOT EXISTS wait_list (
+    id            BIGINT AUTO_INCREMENT PRIMARY KEY,
+    event_id      BIGINT       NOT NULL COMMENT 'Reference to event',
+    player_id     BIGINT       NOT NULL COMMENT 'Reference to player',
+    notes         VARCHAR(255) NULL COMMENT 'Notes',
+    status        VARCHAR(20)  NOT NULL DEFAULT 'WAITING' COMMENT 'Status (WAITING, PROMOTED, CANCELLED, EXPIRED)',
+    create_time   DATETIME     NULL COMMENT 'Creation time',
+    update_time   DATETIME     NULL COMMENT 'Update time',
+    CONSTRAINT fk_wait_list_event FOREIGN KEY (event_id) REFERENCES event (id),
+    CONSTRAINT fk_wait_list_player FOREIGN KEY (player_id) REFERENCES player (id),
+    UNIQUE KEY uk_wait_list_event_player (event_id, player_id)
+) ENGINE = InnoDB COMMENT 'Event wait list';
+
+-- Add index for faster queries
+CREATE INDEX idx_wait_list_event ON wait_list (event_id);
+CREATE INDEX idx_wait_list_player ON wait_list (player_id);
+CREATE INDEX idx_wait_list_status ON wait_list (status);

eladmin-system/src/main/resources/db/migration/V2__event.sql

@@ -41,7 +41,6 @@ create table event
     name        varchar(32)  not null comment '名称',
     description varchar(255) null comment '描述',
     format      enum ('SINGLE', 'DOUBLE', 'TEAM') not null,
-    max_player  int          null comment '最大人数',
     location    varchar(255) null comment '位置',
     image       varchar(255) null comment '图片',
     create_time datetime     null comment '创建时间',

sport/src/main/java/com/srr/domain/Event.java

@@ -68,10 +68,6 @@ public class Event implements Serializable {
     @ApiModelProperty(value = "SINGLE, DOUBLE")
     private Format format;
 
-    @Column(name = "`max_player`")
-    @ApiModelProperty(value = "Maximum number of people")
-    private Integer maxPlayer;
-
     @Column(name = "`location`")
     @ApiModelProperty(value = "Location")
     private String location;
@@ -140,6 +136,14 @@ public class Event implements Serializable {
     @Column(name = "`allow_wait_list`")
     private boolean allowWaitList;
 
+    @Column(name = "`current_participants`")
+    @ApiModelProperty(value = "Current number of participants")
+    private Integer currentParticipants = 0;
+
+    @Column(name = "`max_participants`")
+    @ApiModelProperty(value = "Maximum number of participants")
+    private Integer maxParticipants;
+
     @Column(name = "`poster_image`")
     private String posterImage;
 

sport/src/main/java/com/srr/domain/WaitList.java

@@ -0,0 +1,85 @@
+/*
+ *  Copyright 2019-2025 Zheng Jie
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package com.srr.domain;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+import com.srr.enumeration.WaitListStatus;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.Getter;
+import lombok.Setter;
+import lombok.experimental.Accessors;
+import org.hibernate.annotations.CreationTimestamp;
+import org.hibernate.annotations.UpdateTimestamp;
+
+import javax.persistence.*;
+import javax.validation.constraints.NotNull;
+import java.io.Serializable;
+import java.sql.Timestamp;
+
+/**
+ * Event Wait List Entity
+ * @author Chanheng
+ * @date 2025-05-26
+ */
+@Entity
+@Getter
+@Setter
+@Accessors(chain = true)
+@Table(name = "wait_list")
+public class WaitList implements Serializable {
+
+    @Id
+    @Column(name = "id")
+    @ApiModelProperty(value = "ID")
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(name = "event_id", nullable = false)
+    @NotNull
+    @ApiModelProperty(value = "Event ID")
+    private Long eventId;
+
+    @Column(name = "player_id", nullable = false)
+    @NotNull
+    @ApiModelProperty(value = "Player ID")
+    private Long playerId;
+    
+    @Column(name = "notes")
+    @ApiModelProperty(value = "Notes")
+    private String notes;
+    
+    @Enumerated(EnumType.STRING)
+    @Column(name = "status")
+    @ApiModelProperty(value = "Status (WAITING, PROMOTED, CANCELLED, EXPIRED)")
+    private WaitListStatus status = WaitListStatus.WAITING;
+    
+    @Column(name = "create_time")
+    @CreationTimestamp
+    @ApiModelProperty(value = "Creation Time")
+    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
+    private Timestamp createTime;
+    
+    @Column(name = "update_time")
+    @UpdateTimestamp
+    @ApiModelProperty(value = "Update Time")
+    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
+    private Timestamp updateTime;
+    
+    public void copy(WaitList source) {
+        this.notes = source.getNotes();
+        this.status = source.getStatus();
+    }
+}

sport/src/main/java/com/srr/dto/EventDto.java

@@ -45,9 +45,6 @@ public class EventDto implements Serializable {
     @ApiModelProperty(value = "SINGLE, DOUBLE")
     private Format format;
 
-    @ApiModelProperty(value = "最大人数")
-    private Integer maxPlayer;
-
     @ApiModelProperty(value = "位置")
     private String location;
 
@@ -95,6 +92,12 @@ public class EventDto implements Serializable {
 
     private String posterImage;
     
+    @ApiModelProperty(value = "Current number of participants")
+    private Integer currentParticipants;
+    
+    @ApiModelProperty(value = "Maximum number of participants")
+    private Integer maxParticipants;
+    
     @ApiModelProperty(value = "Co-host players")
     private List<PlayerDto> coHostPlayers;
     

sport/src/main/java/com/srr/dto/JoinEventDto.java

@@ -1,13 +1,43 @@
+/*
+ *  Copyright 2019-2025 Zheng Jie
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
 package com.srr.dto;
 
+import io.swagger.annotations.ApiModelProperty;
 import lombok.Data;
 
 import javax.validation.constraints.NotNull;
 
+/**
+ * @author Chanheng
+ * @date 2025-05-26
+ */
 @Data
 public class JoinEventDto {
-    private Long playerId;
+    
+    @ApiModelProperty(value = "Event ID")
     @NotNull
     private Long eventId;
+    
+    @ApiModelProperty(value = "Player ID")
+    @NotNull
+    private Long playerId;
+    
+    @ApiModelProperty(value = "Team ID (optional)")
     private Long teamId;
+    
+    @ApiModelProperty(value = "Join as wait list")
+    private Boolean joinWaitList = false;
 }

sport/src/main/java/com/srr/dto/WaitListDto.java

@@ -0,0 +1,65 @@
+/*
+ *  Copyright 2019-2025 Zheng Jie
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package com.srr.dto;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+import com.srr.enumeration.WaitListStatus;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.io.Serializable;
+import java.sql.Timestamp;
+
+/**
+ * @author Chanheng
+ * @date 2025-05-26
+ * @description Wait list DTO for transferring wait list data
+ */
+@Getter
+@Setter
+public class WaitListDto implements Serializable {
+    
+    @ApiModelProperty(value = "id")
+    private Long id;
+    
+    @ApiModelProperty(value = "Event ID")
+    private Long eventId;
+    
+    @ApiModelProperty(value = "Player ID")
+    private Long playerId;
+    
+    @ApiModelProperty(value = "Notes")
+    private String notes;
+    
+    @ApiModelProperty(value = "Status (WAITING, PROMOTED, CANCELLED, EXPIRED)")
+    private WaitListStatus status;
+    
+    @ApiModelProperty(value = "Creation time")
+    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
+    private Timestamp createTime;
+    
+    @ApiModelProperty(value = "Update time")
+    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
+    private Timestamp updateTime;
+    
+    // Additional relationships can be added if needed
+    @ApiModelProperty(value = "Player")
+    private PlayerDto player;
+    
+    @ApiModelProperty(value = "Event")
+    private EventDto event;
+}

sport/src/main/java/com/srr/dto/WaitListQueryCriteria.java

@@ -0,0 +1,51 @@
+/*
+ *  Copyright 2019-2025 Zheng Jie
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package com.srr.dto;
+
+import com.srr.enumeration.WaitListStatus;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.Data;
+import me.zhengjie.annotation.Query;
+
+import java.sql.Timestamp;
+import java.util.List;
+
+/**
+ * @author Chanheng
+ * @date 2025-05-26
+ */
+@Data
+public class WaitListQueryCriteria {
+
+    @Query
+    private Long id;
+    
+    @Query
+    @ApiModelProperty(value = "Event ID")
+    private Long eventId;
+    
+    @Query
+    @ApiModelProperty(value = "Player ID")
+    private Long playerId;
+    
+    @Query
+    @ApiModelProperty(value = "Status")
+    private WaitListStatus status;
+    
+    @Query(type = Query.Type.BETWEEN)
+    @ApiModelProperty(value = "Create time range")
+    private List<Timestamp> createTime;
+}

sport/src/main/java/com/srr/enumeration/WaitListStatus.java

@@ -0,0 +1,36 @@
+/*
+ *  Copyright 2019-2025 Zheng Jie
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package com.srr.enumeration;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+/**
+ * Enum representing the possible states of a wait list entry
+ * @author Chanheng
+ * @date 2025-05-26
+ */
+@Getter
+@AllArgsConstructor
+public enum WaitListStatus {
+    
+    WAITING("Waiting"),
+    PROMOTED("Promoted to participant"),
+    CANCELLED("Cancelled by player"),
+    EXPIRED("Expired due to event start");
+    
+    private final String description;
+}

sport/src/main/java/com/srr/repository/WaitListRepository.java

@@ -0,0 +1,66 @@
+/*
+ *  Copyright 2019-2025 Zheng Jie
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package com.srr.repository;
+
+import com.srr.domain.WaitList;
+import com.srr.enumeration.WaitListStatus;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
+
+import java.util.List;
+
+/**
+ * @author Chanheng
+ * @date 2025-05-26
+ */
+public interface WaitListRepository extends JpaRepository<WaitList, Long>, JpaSpecificationExecutor<WaitList> {
+    
+    /**
+     * Find all wait list entries for an event
+     * @param eventId The event ID
+     * @return List of wait list entries
+     */
+    List<WaitList> findByEventId(Long eventId);
+    
+    /**
+     * Find all wait list entries for a player
+     * @param playerId The player ID
+     * @return List of wait list entries
+     */
+    List<WaitList> findByPlayerId(Long playerId);
+    
+    /**
+     * Find wait list entry for a specific player and event
+     * @param eventId The event ID
+     * @param playerId The player ID
+     * @return WaitList entry if exists
+     */
+    WaitList findByEventIdAndPlayerId(Long eventId, Long playerId);
+    
+    /**
+     * Find wait list entries by status
+     * @param status The status (WAITING, PROMOTED, CANCELLED, EXPIRED)
+     * @return List of wait list entries
+     */
+    List<WaitList> findByStatus(WaitListStatus status);
+    
+    /**
+     * Count wait list entries for an event
+     * @param eventId The event ID
+     * @return Count of wait list entries
+     */
+    long countByEventId(Long eventId);
+}

sport/src/main/java/com/srr/rest/EventController.java

@@ -93,7 +93,13 @@ public class EventController {
         return new ResponseEntity<>(result, HttpStatus.OK);
     }
 
+    @PostMapping("/{id}/join")
+    @Log("Join event")
+    @ApiOperation("Join event")
+    @PreAuthorize("@el.check('event:join')")
     public ResponseEntity<Object> joinEvent(@PathVariable Long id, @RequestBody JoinEventDto joinEventDto) {
+        // Ensure ID in path matches ID in DTO
+        joinEventDto.setEventId(id);
         final EventDto result = eventService.joinEvent(joinEventDto);
         return new ResponseEntity<>(result, HttpStatus.OK);
     }

sport/src/main/java/com/srr/rest/WaitListController.java

@@ -0,0 +1,108 @@
+/*
+ *  Copyright 2019-2025 Zheng Jie
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package com.srr.rest;
+
+import com.srr.domain.WaitList;
+import com.srr.dto.WaitListDto;
+import com.srr.dto.WaitListQueryCriteria;
+import com.srr.service.WaitListService;
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiOperation;
+import lombok.RequiredArgsConstructor;
+import me.zhengjie.utils.PageResult;
+import org.springframework.data.domain.Pageable;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.access.prepost.PreAuthorize;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.*;
+
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.util.List;
+
+/**
+ * @author Chanheng
+ * @date 2025-05-26
+ */
+@RestController
+@RequiredArgsConstructor
+@Api(tags = "Wait List Management")
+@RequestMapping("/api/wait-list")
+public class WaitListController {
+
+    private final WaitListService waitListService;
+    private static final String ENTITY_NAME = "waitList";
+
+    @ApiOperation("Export wait list data")
+    @GetMapping(value = "/download")
+    @PreAuthorize("@el.check('waitList:list')")
+    public void exportWaitList(HttpServletResponse response, WaitListQueryCriteria criteria) throws IOException {
+        waitListService.download(waitListService.queryAll(criteria), response);
+    }
+
+    @ApiOperation("Query wait list entries")
+    @GetMapping
+    @PreAuthorize("@el.check('waitList:list')")
+    public ResponseEntity<PageResult<WaitListDto>> queryWaitList(WaitListQueryCriteria criteria, Pageable pageable) {
+        return new ResponseEntity<>(waitListService.queryAll(criteria, pageable), HttpStatus.OK);
+    }
+
+    @ApiOperation("Query wait list entries by event ID")
+    @GetMapping(value = "/event/{eventId}")
+    @PreAuthorize("@el.check('waitList:list')")
+    public ResponseEntity<List<WaitListDto>> queryWaitListByEvent(@PathVariable Long eventId) {
+        return new ResponseEntity<>(waitListService.findByEventId(eventId), HttpStatus.OK);
+    }
+
+    @ApiOperation("Query wait list entries by player ID")
+    @GetMapping(value = "/player/{playerId}")
+    @PreAuthorize("@el.check('waitList:list')")
+    public ResponseEntity<List<WaitListDto>> queryWaitListByPlayer(@PathVariable Long playerId) {
+        return new ResponseEntity<>(waitListService.findByPlayerId(playerId), HttpStatus.OK);
+    }
+
+    @ApiOperation("Add to wait list")
+    @PostMapping
+    @PreAuthorize("@el.check('waitList:add')")
+    public ResponseEntity<WaitListDto> createWaitList(@Validated @RequestBody WaitList resources) {
+        return new ResponseEntity<>(waitListService.create(resources), HttpStatus.CREATED);
+    }
+
+    @ApiOperation("Update wait list entry")
+    @PutMapping
+    @PreAuthorize("@el.check('waitList:edit')")
+    public ResponseEntity<Object> updateWaitList(@Validated @RequestBody WaitList resources) {
+        waitListService.update(resources);
+        return new ResponseEntity<>(HttpStatus.NO_CONTENT);
+    }
+
+    @ApiOperation("Promote player from wait list to participant")
+    @PutMapping(value = "/{id}/promote")
+    @PreAuthorize("@el.check('waitList:edit')")
+    public ResponseEntity<Object> promoteWaitListEntry(@PathVariable Long id) {
+        boolean success = waitListService.promoteToParticipant(id);
+        return new ResponseEntity<>(success ? HttpStatus.OK : HttpStatus.BAD_REQUEST);
+    }
+
+    @ApiOperation("Delete wait list entry")
+    @DeleteMapping(value = "/{id}")
+    @PreAuthorize("@el.check('waitList:del')")
+    public ResponseEntity<Object> deleteWaitList(@PathVariable Long id) {
+        waitListService.delete(id);
+        return new ResponseEntity<>(HttpStatus.OK);
+    }
+}

sport/src/main/java/com/srr/service/EventService.java

@@ -18,6 +18,7 @@ package com.srr.service;
 import com.srr.domain.Event;
 import com.srr.dto.EventDto;
 import com.srr.dto.EventQueryCriteria;
+import com.srr.dto.JoinEventDto;
 import com.srr.enumeration.EventStatus;
 import org.springframework.data.domain.Pageable;
 
@@ -70,6 +71,13 @@ public interface EventService {
 
     EventDto updateStatus(Long id, EventStatus status);
 
+    /**
+     * Join an event
+     * @param joinEventDto Data for joining an event
+     * @return Updated event data
+     */
+    EventDto joinEvent(JoinEventDto joinEventDto);
+
     /**
     * Multi-select delete
     * @param ids /

sport/src/main/java/com/srr/service/WaitListService.java

@@ -0,0 +1,118 @@
+/*
+ *  Copyright 2019-2025 Zheng Jie
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package com.srr.service;
+
+import com.srr.domain.WaitList;
+import com.srr.dto.WaitListDto;
+import com.srr.dto.WaitListQueryCriteria;
+import me.zhengjie.utils.PageResult;
+import org.springframework.data.domain.Pageable;
+
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * @author Chanheng
+ * @date 2025-05-26
+ */
+public interface WaitListService {
+
+    /**
+     * Add a player to the wait list
+     * @param waitList Player wait list entry
+     * @return Created wait list entry
+     */
+    WaitListDto create(WaitList waitList);
+
+    /**
+     * Update wait list entry
+     * @param waitList Updated wait list entry
+     */
+    void update(WaitList waitList);
+
+    /**
+     * Delete wait list entry
+     * @param id Wait list entry ID
+     */
+    void delete(Long id);
+    
+    /**
+     * Delete multiple wait list entries
+     * @param ids List of wait list entry IDs
+     */
+    void deleteAll(List<Long> ids);
+
+    /**
+     * Find a wait list entry by ID
+     * @param id Wait list entry ID
+     * @return Wait list entry
+     */
+    WaitListDto findById(Long id);
+    
+    /**
+     * Find wait list entries by event ID
+     * @param eventId Event ID
+     * @return List of wait list entries
+     */
+    List<WaitListDto> findByEventId(Long eventId);
+    
+    /**
+     * Find wait list entries by player ID
+     * @param playerId Player ID
+     * @return List of wait list entries
+     */
+    List<WaitListDto> findByPlayerId(Long playerId);
+    
+    /**
+     * Find wait list entry for a specific player and event
+     * @param eventId Event ID
+     * @param playerId Player ID
+     * @return Wait list entry
+     */
+    WaitListDto findByEventAndPlayer(Long eventId, Long playerId);
+    
+    /**
+     * Promote a player from wait list to event participant
+     * @param waitListId Wait list entry ID
+     * @return True if promotion successful
+     */
+    boolean promoteToParticipant(Long waitListId);
+    
+    /**
+     * Query wait list with criteria
+     * @param criteria Query criteria
+     * @param pageable Pagination information
+     * @return Page result with wait list entries
+     */
+    PageResult<WaitListDto> queryAll(WaitListQueryCriteria criteria, Pageable pageable);
+    
+    /**
+     * Query all wait list entries
+     * @param criteria Query criteria
+     * @return List of wait list entries
+     */
+    List<WaitListDto> queryAll(WaitListQueryCriteria criteria);
+    
+    /**
+     * Export wait list data
+     * @param queryAll All wait list entries
+     * @param response HTTP response
+     * @throws IOException If export fails
+     */
+    void download(List<WaitListDto> queryAll, HttpServletResponse response) throws IOException;
+}

sport/src/main/java/com/srr/service/impl/EventServiceImpl.java

@@ -26,6 +26,10 @@ import com.srr.service.EventService;
 import com.srr.dto.EventDto;
 import com.srr.dto.EventQueryCriteria;
 import com.srr.dto.mapstruct.EventMapper;
+import com.srr.dto.JoinEventDto;
+import com.srr.repository.TeamPlayerRepository;
+import com.srr.repository.TeamRepository;
+import me.zhengjie.exception.BadRequestException;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.data.domain.Page;
@@ -56,6 +60,8 @@ public class EventServiceImpl implements EventService {
 
     private final EventRepository eventRepository;
     private final EventMapper eventMapper;
+    private final TeamRepository teamRepository;
+    private final TeamPlayerRepository teamPlayerRepository;
 
     @Override
     public PageResult<EventDto> queryAll(EventQueryCriteria criteria, Pageable pageable) {
@@ -110,6 +116,50 @@ public class EventServiceImpl implements EventService {
         return eventMapper.toDto(result);
     }
 
+    @Override
+    @Transactional(rollbackFor = Exception.class)
+    public EventDto joinEvent(JoinEventDto joinEventDto) {
+        // Find the event
+        Event event = eventRepository.findById(joinEventDto.getEventId())
+                .orElseThrow(() -> new EntityNotFoundException(Event.class, "id", joinEventDto.getEventId()));
+        
+        // Check if event allows joining
+        if (event.getStatus() != EventStatus.OPEN) {
+            throw new BadRequestException("Event is not open for joining");
+        }
+        
+        // Check if event is full and handle waitlist
+        boolean isWaitList = joinEventDto.getJoinWaitList() != null && joinEventDto.getJoinWaitList();
+        if (event.getMaxParticipants() != null && 
+            event.getCurrentParticipants() >= event.getMaxParticipants() && 
+            !isWaitList) {
+            if (!event.isAllowWaitList()) {
+                throw new BadRequestException("Event is full and does not allow waitlist");
+            }
+            // Set joinWaitList to true if event is full and waitlist is allowed
+            isWaitList = true;
+        }
+        
+        // Handle team-related logic
+        if (joinEventDto.getTeamId() != null) {
+            // Add player to existing team
+            // For implementation, you'd use teamRepository and teamPlayerRepository
+            // to check if team exists and add the player
+        } else {
+            // Create new team for the player if needed
+            // or add as individual participant depending on event format
+        }
+        
+        // Update participant count if not joining waitlist
+        if (!isWaitList) {
+            event.setCurrentParticipants(event.getCurrentParticipants() + 1);
+        }
+        
+        // Save and return updated event
+        final var result = eventRepository.save(event);
+        return eventMapper.toDto(result);
+    }
+
     @Override
     public void deleteAll(Long[] ids) {
         for (Long id : ids) {
@@ -125,7 +175,6 @@ public class EventServiceImpl implements EventService {
             map.put("名称", event.getName());
             map.put("描述", event.getDescription());
             map.put("SINGLE, DOUBLE", event.getFormat());
-            map.put("最大人数", event.getMaxPlayer());
             map.put("位置", event.getLocation());
             map.put("图片", event.getImage());
             map.put("创建时间", event.getCreateTime());

sport/src/main/java/com/srr/service/impl/WaitListServiceImpl.java

@@ -0,0 +1,206 @@
+/*
+ *  Copyright 2019-2025 Zheng Jie
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package com.srr.service.impl;
+
+import com.srr.domain.Event;
+import com.srr.domain.WaitList;
+import com.srr.enumeration.WaitListStatus;
+import com.srr.dto.WaitListDto;
+import com.srr.dto.WaitListQueryCriteria;
+import com.srr.repository.EventRepository;
+import com.srr.repository.WaitListRepository;
+import com.srr.service.WaitListService;
+import lombok.RequiredArgsConstructor;
+import me.zhengjie.exception.BadRequestException;
+import me.zhengjie.exception.EntityNotFoundException;
+import me.zhengjie.utils.FileUtil;
+import me.zhengjie.utils.PageUtil;
+import me.zhengjie.utils.QueryHelp;
+import me.zhengjie.utils.PageResult;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.util.*;
+import java.util.stream.Collectors;
+
+/**
+ * @author Chanheng
+ * @date 2025-05-26
+ */
+@Service
+@RequiredArgsConstructor
+public class WaitListServiceImpl implements WaitListService {
+
+    private final WaitListRepository waitListRepository;
+    private final EventRepository eventRepository;
+
+    @Override
+    @Transactional
+    public WaitListDto create(WaitList resources) {
+        // Validate event exists
+        Event event = eventRepository.findById(resources.getEventId())
+                .orElseThrow(() -> new EntityNotFoundException(Event.class, "id", resources.getEventId()));
+        
+        // Check if player is already in wait list
+        if (waitListRepository.findByEventIdAndPlayerId(resources.getEventId(), resources.getPlayerId()) != null) {
+            throw new BadRequestException("Player is already in wait list");
+        }
+        
+        // Set default status
+        resources.setStatus(WaitListStatus.WAITING);
+        
+        return mapToDto(waitListRepository.save(resources));
+    }
+
+    @Override
+    @Transactional
+    public void update(WaitList resources) {
+        WaitList waitList = waitListRepository.findById(resources.getId())
+                .orElseThrow(() -> new EntityNotFoundException(WaitList.class, "id", resources.getId()));
+        waitList.copy(resources);
+        waitListRepository.save(waitList);
+    }
+
+    @Override
+    @Transactional
+    public void delete(Long id) {
+        waitListRepository.deleteById(id);
+    }
+
+    @Override
+    @Transactional
+    public void deleteAll(List<Long> ids) {
+        waitListRepository.deleteAllById(ids);
+    }
+
+    @Override
+    public WaitListDto findById(Long id) {
+        WaitList waitList = waitListRepository.findById(id)
+                .orElseThrow(() -> new EntityNotFoundException(WaitList.class, "id", id));
+        return mapToDto(waitList);
+    }
+
+    @Override
+    public List<WaitListDto> findByEventId(Long eventId) {
+        // Validate event exists
+        if (!eventRepository.existsById(eventId)) {
+            throw new EntityNotFoundException(Event.class, "id", eventId);
+        }
+        
+        return waitListRepository.findByEventId(eventId).stream()
+                .map(this::mapToDto)
+                .collect(Collectors.toList());
+    }
+
+    @Override
+    public List<WaitListDto> findByPlayerId(Long playerId) {
+        return waitListRepository.findByPlayerId(playerId).stream()
+                .map(this::mapToDto)
+                .collect(Collectors.toList());
+    }
+
+    @Override
+    public WaitListDto findByEventAndPlayer(Long eventId, Long playerId) {
+        WaitList waitList = waitListRepository.findByEventIdAndPlayerId(eventId, playerId);
+        return waitList != null ? mapToDto(waitList) : null;
+    }
+
+    @Override
+    @Transactional
+    public boolean promoteToParticipant(Long waitListId) {
+        // Find wait list entry
+        WaitList waitList = waitListRepository.findById(waitListId)
+                .orElseThrow(() -> new EntityNotFoundException(WaitList.class, "id", waitListId));
+        
+        // Find event
+        Event event = eventRepository.findById(waitList.getEventId())
+                .orElseThrow(() -> new EntityNotFoundException(Event.class, "id", waitList.getEventId()));
+        
+        // Check if event is full
+        if (event.getCurrentParticipants() >= event.getMaxParticipants()) {
+            return false;
+        }
+        
+        // Update wait list status
+        waitList.setStatus(WaitListStatus.PROMOTED);
+        waitListRepository.save(waitList);
+        
+        // Increment participant count
+        event.setCurrentParticipants(event.getCurrentParticipants() + 1);
+        eventRepository.save(event);
+        
+        // TODO: Add player to event participants (implementation depends on your data model)
+        
+        return true;
+    }
+
+    @Override
+    public PageResult<WaitListDto> queryAll(WaitListQueryCriteria criteria, Pageable pageable) {
+        Page<WaitList> page = waitListRepository.findAll((root, criteriaQuery, criteriaBuilder) -> 
+                QueryHelp.getPredicate(root, criteria, criteriaBuilder), pageable);
+        return PageUtil.toPage(page.map(this::mapToDto));
+    }
+
+    @Override
+    public List<WaitListDto> queryAll(WaitListQueryCriteria criteria) {
+        return waitListRepository.findAll((root, criteriaQuery, criteriaBuilder) -> 
+                QueryHelp.getPredicate(root, criteria, criteriaBuilder))
+                .stream()
+                .map(this::mapToDto)
+                .collect(Collectors.toList());
+    }
+
+    @Override
+    public void download(List<WaitListDto> queryAll, HttpServletResponse response) throws IOException {
+        List<Map<String, Object>> list = new ArrayList<>();
+        for (WaitListDto waitList : queryAll) {
+            Map<String, Object> map = new LinkedHashMap<>();
+            map.put("Event ID", waitList.getEventId());
+            map.put("Player ID", waitList.getPlayerId());
+            map.put("Status", waitList.getStatus() != null ? waitList.getStatus().getDescription() : null);
+            map.put("Notes", waitList.getNotes());
+            map.put("Creation Time", waitList.getCreateTime());
+            list.add(map);
+        }
+        FileUtil.downloadExcel(list, response);
+    }
+    
+    /**
+     * Map entity to DTO
+     */
+    private WaitListDto mapToDto(WaitList waitList) {
+        if (waitList == null) {
+            return null;
+        }
+        
+        WaitListDto dto = new WaitListDto();
+        dto.setId(waitList.getId());
+        dto.setEventId(waitList.getEventId());
+        dto.setPlayerId(waitList.getPlayerId());
+        dto.setNotes(waitList.getNotes());
+        dto.setStatus(waitList.getStatus());
+        dto.setCreateTime(waitList.getCreateTime());
+        dto.setUpdateTime(waitList.getUpdateTime());
+        
+        // Load relationships if needed (can be implemented based on requirements)
+        
+        return dto;
+    }
+}