Complete link creation api

src/main/java/cc/ryanc/halo/model/entity/Link.java

@@ -37,13 +37,13 @@ public class Link extends BaseEntity {
     /**
      * Link website address.
      */
-    @Column(name = "url", columnDefinition = "varchar(255) not null")
+    @Column(name = "url", columnDefinition = "varchar(1023) not null")
     private String url;
 
     /**
      * Website logo.
      */
-    @Column(name = "logo", columnDefinition = "varchar(255) default ''")
+    @Column(name = "logo", columnDefinition = "varchar(1023) default ''")
     private String logo;
 
     /**
@@ -62,6 +62,19 @@ public class Link extends BaseEntity {
     @Override
     public void prePersist() {
         super.prePersist();
+
         id = null;
+
+        if (logo == null) {
+            logo = "";
+        }
+
+        if (description == null) {
+            description = "";
+        }
+
+        if (team == null) {
+            team = "";
+        }
     }
 }

src/main/java/cc/ryanc/halo/model/params/LinkParam.java

@@ -0,0 +1,38 @@
+package cc.ryanc.halo.model.params;
+
+import cc.ryanc.halo.model.dto.base.InputConverter;
+import cc.ryanc.halo.model.entity.Link;
+import lombok.Data;
+import org.hibernate.validator.constraints.URL;
+
+import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.Size;
+
+/**
+ * Link param.
+ *
+ * @author johnniang
+ * @date 4/3/19
+ */
+@Data
+public class LinkParam implements InputConverter<Link> {
+
+    @NotBlank(message = "Link name must not be blank")
+    @Size(max = 255, message = "Length of link name must not be more than {max}")
+    private String name;
+
+    @NotBlank(message = "Link url must not be blank")
+    @Size(max = 1023, message = "Length of link url must not be more than {max}")
+    @URL(message = "Link url format is incorrect")
+    private String url;
+
+    @Size(max = 1023, message = "Length of link logo must not be more than {max}")
+    private String logo;
+
+    @Size(max = 255, message = "Length of link description must not be more than {max}")
+    private String description;
+
+    @Size(max = 255, message = "Length of link team must not be more than {max}")
+    private String team;
+
+}

src/main/java/cc/ryanc/halo/service/LinkService.java

@@ -1,8 +1,9 @@
 package cc.ryanc.halo.service;
 
 import cc.ryanc.halo.model.dto.LinkOutputDTO;
-import cc.ryanc.halo.model.dto.LinkTeamOutputDTO;
 import cc.ryanc.halo.model.entity.Link;
+import cc.ryanc.halo.model.params.LinkParam;
+import cc.ryanc.halo.model.vo.LinkTeamVO;
 import cc.ryanc.halo.service.base.CrudService;
 import org.springframework.data.domain.Sort;
 import org.springframework.lang.NonNull;
@@ -22,12 +23,40 @@ public interface LinkService extends CrudService<Link, Integer> {
      * @param sort sort
      * @return all links
      */
+    @NonNull
     List<LinkOutputDTO> listDtos(@NonNull Sort sort);
 
     /**
      * List link by group
      *
-     * @return List<LinkTeamOutputDTO>
+     * @return a list of link team vo
      */
-    List<LinkTeamOutputDTO> listTeam();
+    @NonNull
+    List<LinkTeamVO> listTeamVos();
+
+    /**
+     * Lists link team vos.
+     *
+     * @param sort must not be null
+     * @return a list of link team vo
+     */
+    @NonNull
+    List<LinkTeamVO> listTeamVos(@NonNull Sort sort);
+
+    /**
+     * Creates link by link param.
+     *
+     * @param linkParam must not be null
+     * @return create link
+     */
+    @NonNull
+    Link createBy(@NonNull LinkParam linkParam);
+
+    /**
+     * Exists by link name.
+     *
+     * @param name must not be blank
+     * @return true if exists; false otherwise
+     */
+    boolean existByName(String name);
 }

src/main/java/cc/ryanc/halo/service/impl/LinkServiceImpl.java

@@ -1,16 +1,23 @@
 package cc.ryanc.halo.service.impl;
 
+import cc.ryanc.halo.exception.AlreadyExistsException;
 import cc.ryanc.halo.model.dto.LinkOutputDTO;
-import cc.ryanc.halo.model.dto.LinkTeamOutputDTO;
 import cc.ryanc.halo.model.entity.Link;
+import cc.ryanc.halo.model.params.LinkParam;
+import cc.ryanc.halo.model.vo.LinkTeamVO;
 import cc.ryanc.halo.repository.LinkRepository;
 import cc.ryanc.halo.service.LinkService;
 import cc.ryanc.halo.service.base.AbstractCrudService;
+import cc.ryanc.halo.utils.ServiceUtils;
+import org.springframework.data.domain.Example;
 import org.springframework.data.domain.Sort;
+import org.springframework.lang.NonNull;
+import org.springframework.lang.Nullable;
 import org.springframework.stereotype.Service;
 import org.springframework.util.Assert;
+import org.springframework.util.CollectionUtils;
 
-import java.util.List;
+import java.util.*;
 import java.util.stream.Collectors;
 
 /**
@@ -39,17 +46,79 @@ public class LinkServiceImpl extends AbstractCrudService<Link, Integer> implemen
     public List<LinkOutputDTO> listDtos(Sort sort) {
         Assert.notNull(sort, "Sort info must not be null");
 
-        return listAll(sort).stream().map(link -> (LinkOutputDTO) new LinkOutputDTO().convertFrom(link)).collect(Collectors.toList());
+        return convertTo(listAll(sort));
     }
 
     /**
      * List link by group
      *
-     * @return List<LinkTeamOutputDTO>
+     * @return List<LinkTeamVO>
      */
     @Override
-    public List<LinkTeamOutputDTO> listTeam() {
+    public List<LinkTeamVO> listTeamVos() {
         // TODO list team
         return null;
     }
+
+    @Override
+    public List<LinkTeamVO> listTeamVos(Sort sort) {
+        Assert.notNull(sort, "Sort info must not be null");
+
+        // List all links
+        List<LinkOutputDTO> links = listDtos(sort);
+
+        // Get teams
+        Set<String> teams = ServiceUtils.fetchProperty(links, LinkOutputDTO::getTeam);
+
+        // Convert to team link list map (Key: team, value: link list)
+        Map<String, List<LinkOutputDTO>> teamLinkListMap = ServiceUtils.convertToListMap(teams, links, LinkOutputDTO::getTeam);
+
+        List<LinkTeamVO> result = new LinkedList<>();
+
+        // Wrap link team vo list
+        teamLinkListMap.forEach((team, linkList) -> {
+            // Build link team vo
+            LinkTeamVO linkTeamVO = new LinkTeamVO();
+            linkTeamVO.setTeam(team);
+            linkTeamVO.setLinks(linkList);
+
+            // Add it to result
+            result.add(linkTeamVO);
+        });
+
+        return result;
+    }
+
+    @Override
+    public Link createBy(LinkParam linkParam) {
+        Assert.notNull(linkParam, "Link param must not be null");
+
+        // Check the name
+        boolean exist = existByName(linkParam.getName());
+
+        if (exist) {
+            throw new AlreadyExistsException("Link name " + linkParam.getName() + " has already existed").setErrorData(linkParam.getName());
+        }
+
+        return create(linkParam.convertTo());
+    }
+
+    @Override
+    public boolean existByName(String name) {
+        Assert.hasText(name, "Link name must not be blank");
+        Link link = new Link();
+        link.setName(name);
+
+        return linkRepository.exists(Example.of(link));
+    }
+
+    @NonNull
+    private List<LinkOutputDTO> convertTo(@Nullable List<Link> links) {
+        if (CollectionUtils.isEmpty(links)) {
+            return Collections.emptyList();
+        }
+
+        return links.stream().map(link -> new LinkOutputDTO().<LinkOutputDTO>convertFrom(link))
+                .collect(Collectors.toList());
+    }
 }

src/main/java/cc/ryanc/halo/web/controller/admin/api/LinkController.java

@@ -1,12 +1,15 @@
 package cc.ryanc.halo.web.controller.admin.api;
 
 import cc.ryanc.halo.model.dto.LinkOutputDTO;
+import cc.ryanc.halo.model.entity.Link;
+import cc.ryanc.halo.model.params.LinkParam;
 import cc.ryanc.halo.service.LinkService;
 import io.swagger.annotations.ApiOperation;
 import org.springframework.data.domain.Sort;
 import org.springframework.data.web.SortDefault;
 import org.springframework.web.bind.annotation.*;
 
+import javax.validation.Valid;
 import java.util.List;
 
 /**
@@ -16,7 +19,7 @@ import java.util.List;
  * @date : 2019/3/21
  */
 @RestController
-@RequestMapping(value = "/admin/api/links")
+@RequestMapping("/admin/api/links")
 public class LinkController {
 
     private final LinkService linkService;
@@ -48,6 +51,12 @@ public class LinkController {
         return new LinkOutputDTO().convertFrom(linkService.getById(id));
     }
 
+    @PostMapping
+    public LinkOutputDTO createBy(@RequestBody @Valid LinkParam linkParam) {
+        Link link = linkService.createBy(linkParam);
+        return new LinkOutputDTO().convertFrom(link);
+    }
+
     /**
      * Delete link by id.
      *