Implement enabling/disabling of pdf annotations (#37)

src/dbp-official-signature-pdf-upload.js

@@ -52,6 +52,7 @@ class OfficialSignaturePdfUpload extends ScopedElementsMixin(DBPSignatureLitElem
         this.currentPreviewQueueKey = '';
         this.allowAnnotating = false;
         this.queuedFilesAnnotations = [];
+        this.queuedFilesEnabledAnnotations = [];
         this.queuedFilesAnnotationsCount = 0;
         this.isAnnotationViewVisible = false;
         this.activity = new Activity(metadata);
@@ -176,8 +177,9 @@ class OfficialSignaturePdfUpload extends ScopedElementsMixin(DBPSignatureLitElem
             fileSize: humanFileSize(file.size, false),
         });
 
+        const annotationsEnabled = this.isAnnotationsEnabledForKey(key);
         const annotations = this.takeAnnotationsFromQueue(key);
-        await this.uploadFile(file, params, annotations);
+        await this.uploadFile(file, params, annotationsEnabled ? annotations : []);
         this.uploadInProgress = false;
     }
 

src/dbp-signature-lit-element.js

@@ -134,11 +134,15 @@ export default class DBPSignatureLitElement extends DBPSignatureBaseLitElement {
             this._(viewTag).setAnnotationRows(this.queuedFilesAnnotations[key]);
 
             this.isAnnotationViewVisible = true;
+            this.enableAnnotationsForKey(key);
+        } else {
+            this.disableAnnotationsForKey(key);
 
-        } else if (this.currentPreviewQueueKey === key) {
+            if (this.currentPreviewQueueKey === key) {
                 this.isAnnotationViewVisible = false;
             }
         }
+    }
 
     /**
      * 
@@ -219,10 +223,50 @@ export default class DBPSignatureLitElement extends DBPSignatureBaseLitElement {
     takeAnnotationsFromQueue(key) {
         const annotations = this.queuedFilesAnnotations[key];
         delete this.queuedFilesAnnotations[key];
+        this.disableAnnotationsForKey(key);
 
         return annotations;
     }
 
+    /**
+     * Checks if annotations are enabled for an annotation key
+     *
+     * @param key
+     * @returns {boolean}
+     */
+    isAnnotationsEnabledForKey(key) {
+        return this.queuedFilesEnabledAnnotations.includes(key);
+    }
+
+    /**
+     * Enables annotations for an annotation key
+     *
+     * @param key
+     */
+    enableAnnotationsForKey(key) {
+        if (!this.isAnnotationsEnabledForKey(key)) {
+            this.queuedFilesEnabledAnnotations.push(key);
+        }
+    }
+
+    /**
+     * Disables annotations for an annotation key
+     *
+     * @param key
+     */
+    disableAnnotationsForKey(key) {
+        let i = 0;
+
+        // remove all occurrences of the value "key" in array this.queuedFilesEnabledAnnotations
+        while (i < this.queuedFilesEnabledAnnotations.length) {
+            if (this.queuedFilesEnabledAnnotations[i] === key) {
+                this.queuedFilesEnabledAnnotations.splice(i, 1);
+            } else {
+                ++i;
+            }
+        }
+    }
+
     /**
      * Update an annotation of a file on the queue
      *