feat: Add image paste plugin (#31)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@chatwoot/prosemirror-schema",
-  "version": "1.0.16",
+  "version": "1.0.17",
   "description": "Schema setup for using prosemirror in chatwoot. Based on 👉 https://github.com/ProseMirror/prosemirror-example-setup/",
   "main": "dist/index.js",
   "scripts": {

src/plugins/image.js

@@ -0,0 +1,58 @@
+import { Plugin } from "prosemirror-state";
+
+/**
+ * Replaces an image node in the editor with a new image URL.
+ *
+ * @param {string} currentUrl - The current URL of the image to be replaced.
+ * @param {string} newUrl - The new URL to replace the current image with.
+ * @param {EditorView} view - The ProseMirror editor view.
+ */
+function replaceImage(currentUrl, newUrl, view) {
+  view.state.doc.descendants((node, pos) => {
+    if (node.type.name === "image" && node.attrs.src === currentUrl) {
+      const tr = view.state.tr.setNodeMarkup(pos, null, {
+        ...node.attrs,
+        src: newUrl,
+      });
+      view.dispatch(tr);
+    }
+  });
+}
+
+/**
+ * Creates a ProseMirror plugin that handles image pasting and uploading.
+ *
+ * @param {Function} uploadImage - A function that takes an image URL and returns a Promise
+ * that resolves to the new URL after uploading.
+ * @returns {Plugin} A ProseMirror plugin that handles image pasting.
+ */
+const imagePastePlugin = (uploadImage) =>
+  new Plugin({
+    props: {
+      /**
+       * Handles the paste event in the editor.
+       *
+       * @param {EditorView} view - The ProseMirror editor view.
+       * @param {Event} event - The paste event.
+       * @param {Slice} slice - The ProseMirror Slice object representing the pasted content.
+       */
+      handlePaste(view, event, slice) {
+        const imageUrls = [];
+        slice.content.descendants((node) => {
+          if (node.type.name === "image") {
+            imageUrls.push(node.attrs.src);
+          }
+        });
+        Promise.all(imageUrls.map(async (url) => {
+          try {
+            const newUrl = await uploadImage(url);
+            replaceImage(url, newUrl, view);
+          } catch (error) {
+            console.error("Error uploading image:", error);
+          }
+        }));
+      },
+    },
+  });
+
+export default imagePastePlugin;