Added some potential routes

src/main/kotlin/uk/co/neviyn/booru/Controller.kt

@@ -0,0 +1,82 @@
+package uk.co.neviyn.booru
+
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.data.domain.PageRequest
+import org.springframework.security.core.annotation.AuthenticationPrincipal
+import org.springframework.security.crypto.codec.Hex
+import org.springframework.stereotype.Controller
+import org.springframework.ui.Model
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.PostMapping
+import org.springframework.web.bind.annotation.RequestParam
+import org.springframework.web.multipart.MultipartFile
+import java.io.File
+import java.security.MessageDigest
+
+@Controller
+class BaseController {
+
+    @GetMapping("/")
+    fun landingPage(): String = "landing"
+
+}
+
+@Controller("/gallery")
+class ImageController
+@Autowired constructor(
+    val imageRepository: ImageRepository,
+    val tagRepository: TagRepository
+) {
+
+    @GetMapping
+    fun getGalleryPage(
+        @RequestParam(defaultValue = "1") pageNumber: Int,
+        @RequestParam tags: List<String>?,
+        model: Model
+    ): String {
+        val page = PageRequest.of(pageNumber - 1, 20)
+        if (tags != null) {
+            val tagData = tags.mapNotNull { tagRepository.findByTagIs(it) }
+            val images = imageRepository.findByTagsIsContaining(tagData, page)
+            model.addAttribute("images", images)
+        } else { // If no tag data supplied, just return all images
+            val images = imageRepository.findAll(page)
+            model.addAttribute("images", images)
+        }
+        return "gallery"
+    }
+
+}
+
+@Controller("/upload")
+class UploadController
+@Autowired constructor(
+    val imageRepository: ImageRepository,
+    val tagRepository: TagRepository,
+    val userRepository: UserRepository,
+    val imageConfigurationProperties: ImageConfigurationProperties
+) {
+
+    val digest: MessageDigest = MessageDigest.getInstance("SHA-512/256")
+
+    @GetMapping
+    fun showUploadPage(): String = "upload"
+
+    @PostMapping
+    fun uploadFile(
+        @AuthenticationPrincipal userDetails: CustomUserDetails,
+        @RequestParam file: MultipartFile,
+        @RequestParam tags: List<String>
+    ): String {
+        if (file.isEmpty) return "upload" // TODO: Show error on page, can't upload nothing
+        val extension = File(file.originalFilename!!).extension
+        if (!imageConfigurationProperties.types.contains(extension)) return "upload" // TODO: Show error on page, unrecognised file type
+        val user = userRepository.findByName(userDetails.username)!!
+        val hash: String = Hex.encode(digest.digest(file.bytes)).toString()
+        val tagData = tags.map { tagRepository.findByTagIs(it) ?: tagRepository.save(Tag(it)) }.toMutableSet()
+        val outputFile = File(imageConfigurationProperties.directory, "$hash.$extension")
+        outputFile.writeBytes(file.bytes)
+        imageRepository.save(Image("$hash.$extension", user, tagData))
+        return "upload" // TODO: Show success on page
+    }
+}

src/main/kotlin/uk/co/neviyn/booru/Repository.kt

@@ -1,5 +1,8 @@
 package uk.co.neviyn.booru
 
+import org.springframework.data.domain.Page
+import org.springframework.data.domain.Pageable
+import org.springframework.data.jpa.repository.JpaRepository
 import org.springframework.data.repository.CrudRepository
 
 interface UserRepository : CrudRepository<User, Long> {
@@ -8,6 +11,10 @@ interface UserRepository : CrudRepository<User, Long> {
 
 interface RoleRepository : CrudRepository<Role, Long>
 
-interface ImageRepository : CrudRepository<Image, Long>
+interface ImageRepository : JpaRepository<Image, Long> {
+    fun findByTagsIsContaining(tags: List<Tag>, pageable: Pageable) : Page<Image>
+}
 
-interface TagRepository : CrudRepository<Tag, Long>
+interface TagRepository : CrudRepository<Tag, Long> {
+    fun findByTagIs(tag: String) : Tag?
+}