Merge master

src/UI/InputElement/Validators/ImageUrlValidator.ts

@@ -0,0 +1,39 @@
+import UrlValidator from "./UrlValidator"
+import { Translation } from "../../i18n/Translation"
+
+export default class ImageUrlValidator extends UrlValidator {
+    private static readonly allowedExtensions = ["jpg", "jpeg", "svg", "png"]
+
+    constructor() {
+        super(
+            "image",
+            "Same as the URL-parameter, except that it checks that the URL ends with `.jpg`, `.png` or some other typical image format"
+        )
+    }
+
+    private static hasValidExternsion(str: string): boolean {
+        str = str.toLowerCase()
+        return ImageUrlValidator.allowedExtensions.some((ext) => str.endsWith(ext))
+    }
+
+    getFeedback(s: string, _?: () => string): Translation | undefined {
+        const superF = super.getFeedback(s, _)
+        if (superF) {
+            return superF
+        }
+        if (!ImageUrlValidator.hasValidExternsion(s)) {
+            return new Translation(
+                "This URL does not end with one of the allowed extensions. These are: " +
+                    ImageUrlValidator.allowedExtensions.join(", ")
+            )
+        }
+        return undefined
+    }
+
+    isValid(str: string): boolean {
+        if (!super.isValid(str)) {
+            return false
+        }
+        return ImageUrlValidator.hasValidExternsion(str)
+    }
+}