feat: 시그니처 이미지 등록 시 1:1 크롭 기능을 추가한다

src/views/Signature/SignatureManagement.vue

@@ -369,11 +369,50 @@
         </v-card>
       </v-dialog>
     </v-row>
+
+    <v-dialog
+      v-model="show_cropper_dialog"
+      max-width="800px"
+      persistent
+    >
+      <v-card>
+        <v-card-title>이미지 크롭 (1:1 비율)</v-card-title>
+        <v-card-text>
+          <div class="cropper-wrapper">
+            <img
+              ref="cropper_image"
+              :src="cropper_image_url"
+              alt="Cropper Image"
+              class="cropper-image"
+            >
+          </div>
+        </v-card-text>
+        <v-card-actions>
+          <v-spacer />
+          <v-btn
+            color="grey darken-1"
+            text
+            @click="cancelCropper"
+          >
+            취소
+          </v-btn>
+          <v-btn
+            color="blue darken-1"
+            text
+            @click="cropImage"
+          >
+            크롭 완료
+          </v-btn>
+        </v-card-actions>
+      </v-card>
+    </v-dialog>
   </div>
 </template>
 
 <script>
 import * as api from "@/api/signature";
+import Cropper from 'cropperjs';
+import 'cropperjs/dist/cropper.css';
 
 export default {
   name: "SignatureManagement",
@@ -399,6 +438,10 @@ export default {
       selected_signature_can: {},
       sort_type: 'NEWEST',
 
+      show_cropper_dialog: false,
+      cropper_image_url: '',
+      cropper: null,
+
       headers: [
         {
           text: '캔',
@@ -450,13 +493,70 @@ export default {
     imageAdd(payload) {
       const file = payload;
       if (file) {
-        this.image_url = URL.createObjectURL(file)
-        URL.revokeObjectURL(file)
+        if (file._isCropped) return;
+
+        if (file.type === 'image/gif') {
+          this.image = file
+          this.image_url = URL.createObjectURL(file)
+          return
+        }
+
+        this.cropper_image_url = URL.createObjectURL(file)
+        this.show_cropper_dialog = true
+        this.$nextTick(() => {
+          if (this.cropper) {
+            this.cropper.destroy()
+          }
+          this.cropper = new Cropper(this.$refs.cropper_image, {
+            aspectRatio: 1,
+            viewMode: 1,
+          })
+        })
       } else {
         this.image_url = null
+        this.image = null
       }
     },
 
+    cancelCropper() {
+      this.show_cropper_dialog = false
+      if (this.cropper) {
+        this.cropper.destroy()
+        this.cropper = null
+      }
+      this.cropper_image_url = ''
+      this.image = null
+      this.image_url = null
+    },
+
+    cropImage() {
+      const canvas = this.cropper.getCroppedCanvas()
+      let finalCanvas = canvas
+
+      const MAX_WIDTH = 800
+      if (canvas.width > MAX_WIDTH) {
+        const height = MAX_WIDTH
+        const resizeCanvas = document.createElement('canvas')
+        resizeCanvas.width = MAX_WIDTH
+        resizeCanvas.height = height
+        const ctx = resizeCanvas.getContext('2d')
+        ctx.drawImage(canvas, 0, 0, MAX_WIDTH, height)
+        finalCanvas = resizeCanvas
+      }
+
+      finalCanvas.toBlob((blob) => {
+        const file = new File([blob], 'signature_image.png', {type: 'image/png'})
+        file._isCropped = true
+        this.image = file
+        this.image_url = URL.createObjectURL(blob)
+        this.show_cropper_dialog = false
+        if (this.cropper) {
+          this.cropper.destroy()
+          this.cropper = null
+        }
+      }, 'image/png')
+    },
+
     showWriteDialog() {
       this.show_write_dialog = true
     },
@@ -713,4 +813,14 @@ export default {
   font-weight: bold;
   color: #3bb9f1;
 }
+
+.cropper-wrapper {
+  max-height: 500px;
+  width: 100%;
+}
+
+.cropper-image {
+  display: block;
+  max-width: 100%;
+}
 </style>