Refactoring: move all code files into a src directory

src/Logic/ImageProviders/GenericImageProvider.ts

@@ -0,0 +1,41 @@
+import ImageProvider, { ProvidedImage } from "./ImageProvider"
+
+export default class GenericImageProvider extends ImageProvider {
+    public defaultKeyPrefixes: string[] = ["image"]
+
+    private readonly _valuePrefixBlacklist: string[]
+
+    public constructor(valuePrefixBlacklist: string[]) {
+        super()
+        this._valuePrefixBlacklist = valuePrefixBlacklist
+    }
+
+    async ExtractUrls(key: string, value: string): Promise<Promise<ProvidedImage>[]> {
+        if (this._valuePrefixBlacklist.some((prefix) => value.startsWith(prefix))) {
+            return []
+        }
+
+        try {
+            new URL(value)
+        } catch (_) {
+            // Not a valid URL
+            return []
+        }
+
+        return [
+            Promise.resolve({
+                key: key,
+                url: value,
+                provider: this,
+            }),
+        ]
+    }
+
+    SourceIcon(backlinkSource?: string) {
+        return undefined
+    }
+
+    public DownloadAttribution(url: string) {
+        return undefined
+    }
+}