feat: add envelopes (#2025)

This PR is handles the changes required to support envelopes. The new
envelope editor/signing page will be hidden during release.

The core changes here is to migrate the documents and templates model to
a centralized envelopes model.

Even though Documents and Templates are removed, from the user
perspective they will still exist as we remap envelopes to documents and
templates.

packages/lib/universal/field-renderer/field-generic-items.ts

@@ -0,0 +1,119 @@
+import Konva from 'konva';
+
+import {
+  DEFAULT_RECT_BACKGROUND,
+  RECIPIENT_COLOR_STYLES,
+} from '@documenso/ui/lib/recipient-colors';
+
+import type { FieldToRender, RenderFieldElementOptions } from './field-renderer';
+import { calculateFieldPosition } from './field-renderer';
+
+export const upsertFieldGroup = (
+  field: FieldToRender,
+  options: RenderFieldElementOptions,
+): Konva.Group => {
+  const { pageWidth, pageHeight, pageLayer, editable } = options;
+
+  const { fieldX, fieldY, fieldWidth, fieldHeight } = calculateFieldPosition(
+    field,
+    pageWidth,
+    pageHeight,
+  );
+
+  const fieldGroup: Konva.Group =
+    pageLayer.findOne(`#${field.renderId}`) ||
+    new Konva.Group({
+      id: field.renderId,
+      name: 'field-group',
+    });
+
+  fieldGroup.setAttrs({
+    scaleX: 1,
+    scaleY: 1,
+    x: fieldX,
+    y: fieldY,
+    draggable: editable,
+    dragBoundFunc: (pos) => {
+      const newX = Math.max(0, Math.min(pageWidth - fieldWidth, pos.x));
+      const newY = Math.max(0, Math.min(pageHeight - fieldHeight, pos.y));
+      return { x: newX, y: newY };
+    },
+  } satisfies Partial<Konva.GroupConfig>);
+
+  return fieldGroup;
+};
+
+export const upsertFieldRect = (
+  field: FieldToRender,
+  options: RenderFieldElementOptions,
+): Konva.Rect => {
+  const { pageWidth, pageHeight, mode, pageLayer, color } = options;
+
+  const { fieldWidth, fieldHeight } = calculateFieldPosition(field, pageWidth, pageHeight);
+
+  const fieldRect: Konva.Rect =
+    pageLayer.findOne(`#${field.renderId}-rect`) ||
+    new Konva.Rect({
+      id: `${field.renderId}-rect`,
+      name: 'field-rect',
+    });
+
+  fieldRect.setAttrs({
+    width: fieldWidth,
+    height: fieldHeight,
+    fill: DEFAULT_RECT_BACKGROUND,
+    stroke: color ? RECIPIENT_COLOR_STYLES[color].baseRing : '#e5e7eb',
+    strokeWidth: 2,
+    cornerRadius: 2,
+    strokeScaleEnabled: false,
+    visible: mode !== 'export',
+  } satisfies Partial<Konva.RectConfig>);
+
+  return fieldRect;
+};
+
+export const createSpinner = ({
+  fieldWidth,
+  fieldHeight,
+}: {
+  fieldWidth: number;
+  fieldHeight: number;
+}) => {
+  const loadingGroup = new Konva.Group({
+    name: 'loading-spinner-group',
+  });
+
+  const rect = new Konva.Rect({
+    x: 4,
+    y: 4,
+    width: fieldWidth - 8,
+    height: fieldHeight - 8,
+    fill: 'white',
+    opacity: 1,
+  });
+
+  const spinner = new Konva.Arc({
+    x: fieldWidth / 2,
+    y: fieldHeight / 2,
+    innerRadius: fieldWidth / 10,
+    outerRadius: fieldHeight / 10,
+    angle: 270,
+    rotation: 0,
+    fill: 'rgba(122, 195, 85, 1)',
+    lineCap: 'round',
+  });
+
+  rect.moveToTop();
+  spinner.moveToTop();
+
+  loadingGroup.add(rect);
+  loadingGroup.add(spinner);
+
+  const anim = new Konva.Animation((frame) => {
+    spinner.rotate(180 * (frame.timeDiff / 500));
+  });
+
+  anim.start();
+
+  return loadingGroup;
+};