implement new invitation system

* fix comments on the frontend
* move jwt token service to its own module
* other fixes and updates

apps/client/src/features/editor/utils/index.ts

@@ -0,0 +1,2 @@
+export * from "./is-custom-node-selected";
+export * from "./is-text-selected";

apps/client/src/features/editor/utils/is-custom-node-selected.ts

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+import { Editor } from "@tiptap/react";
+import TiptapLink from "@tiptap/extension-link";
+import { CodeBlock } from "@tiptap/extension-code-block";
+
+export const isCustomNodeSelected = (editor: Editor, node: HTMLElement) => {
+  const customNodes = [CodeBlock.name, TiptapLink.name];
+
+  return customNodes.some((type) => editor.isActive(type));
+};
+
+export default isCustomNodeSelected;

apps/client/src/features/editor/utils/is-text-selected.ts

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+import { isTextSelection } from "@tiptap/core";
+import { Editor } from "@tiptap/react";
+
+export const isTextSelected = ({ editor }: { editor: Editor }) => {
+  const {
+    state: {
+      doc,
+      selection,
+      selection: { empty, from, to },
+    },
+  } = editor;
+
+  // Sometime check for `empty` is not enough.
+  // Doubleclick an empty paragraph returns a node size of 2.
+  // So we check also for an empty text size.
+  const isEmptyTextBlock =
+    !doc.textBetween(from, to).length && isTextSelection(selection);
+
+  if (empty || isEmptyTextBlock || !editor.isEditable) {
+    return false;
+  }
+
+  return true;
+};
+
+export default isTextSelected;