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/render-dropdown-field.ts

@@ -0,0 +1,179 @@
+import Konva from 'konva';
+
+import { DEFAULT_STANDARD_FONT_SIZE } from '../../constants/pdf';
+import type { TDropdownFieldMeta } from '../../types/field-meta';
+import { upsertFieldGroup, upsertFieldRect } from './field-generic-items';
+import { calculateFieldPosition } from './field-renderer';
+import type { FieldToRender, RenderFieldElementOptions } from './field-renderer';
+
+type CalculateDropdownPositionOptions = {
+  fieldWidth: number;
+  fieldHeight: number;
+};
+
+/**
+ * Calculate the position of a field item such as Checkbox, Radio.
+ */
+const calculateDropdownPosition = (options: CalculateDropdownPositionOptions) => {
+  const { fieldWidth, fieldHeight } = options;
+
+  const fieldPadding = 8;
+  const arrowSize = 12;
+
+  const textHeight = fieldHeight - fieldPadding * 2;
+  const textWidth = fieldWidth - fieldPadding * 2;
+  const textX = fieldPadding;
+  const textY = fieldPadding;
+
+  const arrowX = fieldWidth - arrowSize - fieldPadding;
+  const arrowY = fieldHeight / 2;
+
+  return {
+    arrowX,
+    arrowY,
+    arrowSize,
+    textX,
+    textY,
+    textWidth,
+    textHeight,
+  };
+};
+
+export const renderDropdownFieldElement = (
+  field: FieldToRender,
+  options: RenderFieldElementOptions,
+) => {
+  const { pageWidth, pageHeight, pageLayer, mode } = options;
+
+  const isFirstRender = !pageLayer.findOne(`#${field.renderId}`);
+
+  const fieldGroup = upsertFieldGroup(field, options);
+
+  // Clear previous children to re-render fresh.
+  fieldGroup.removeChildren();
+
+  fieldGroup.add(upsertFieldRect(field, options));
+
+  if (isFirstRender) {
+    pageLayer.add(fieldGroup);
+
+    fieldGroup.on('transform', () => {
+      const groupScaleX = fieldGroup.scaleX();
+      const groupScaleY = fieldGroup.scaleY();
+
+      const fieldRect = fieldGroup.findOne('.field-rect');
+      const text = fieldGroup.findOne('.dropdown-selected-text');
+      const arrow = fieldGroup.findOne('.dropdown-arrow');
+
+      if (!fieldRect || !text || !arrow) {
+        console.log('fieldRect or text or arrow not found');
+        return;
+      }
+
+      const rectWidth = fieldRect.width() * groupScaleX;
+      const rectHeight = fieldRect.height() * groupScaleY;
+
+      const { arrowX, arrowY, textX, textY, textWidth, textHeight } = calculateDropdownPosition({
+        fieldWidth: rectWidth,
+        fieldHeight: rectHeight,
+      });
+
+      arrow.setAttrs({
+        x: arrowX,
+        y: arrowY,
+        scaleX: 1,
+        scaleY: 1,
+      });
+
+      text.setAttrs({
+        scaleX: 1,
+        scaleY: 1,
+        x: textX,
+        y: textY,
+        width: textWidth,
+        height: textHeight,
+      });
+
+      fieldRect.setAttrs({
+        width: rectWidth,
+        height: rectHeight,
+      });
+
+      fieldGroup.scale({
+        x: 1,
+        y: 1,
+      });
+
+      pageLayer.batchDraw();
+    });
+  }
+
+  const dropdownMeta: TDropdownFieldMeta | null = (field.fieldMeta as TDropdownFieldMeta) || null;
+  const { fieldWidth, fieldHeight } = calculateFieldPosition(field, pageWidth, pageHeight);
+
+  // Todo: Envelopes - Translations
+  let selectedValue = 'Select Option';
+
+  if (field.inserted) {
+    selectedValue = field.customText;
+  }
+
+  const { arrowX, arrowY, arrowSize, textX, textY, textWidth, textHeight } =
+    calculateDropdownPosition({
+      fieldWidth,
+      fieldHeight,
+    });
+
+  // Selected value text
+  const selectedText = new Konva.Text({
+    name: 'dropdown-selected-text',
+    x: textX,
+    y: textY,
+    width: textWidth,
+    height: textHeight,
+    text: selectedValue,
+    fontSize: DEFAULT_STANDARD_FONT_SIZE,
+    fontFamily: 'Inter, system-ui, sans-serif',
+    fill: '#111827',
+    verticalAlign: 'middle',
+  });
+
+  const arrow = new Konva.Line({
+    name: 'dropdown-arrow',
+    x: arrowX,
+    y: arrowY,
+    points: [0, 0, arrowSize / 2, arrowSize / 2, arrowSize, 0],
+    stroke: '#6B7280',
+    strokeWidth: 2,
+    lineCap: 'round',
+    lineJoin: 'round',
+    closed: false,
+    visible: mode !== 'export',
+  });
+
+  // Add hover state for dropdown
+  fieldGroup.on('mouseenter', () => {
+    // dropdownContainer.stroke('#2563EB');
+    // dropdownContainer.strokeWidth(2);
+    document.body.style.cursor = 'pointer';
+    pageLayer.batchDraw();
+  });
+
+  fieldGroup.on('mouseleave', () => {
+    // dropdownContainer.stroke('#374151');
+    // dropdownContainer.strokeWidth(2);
+    document.body.style.cursor = 'default';
+    pageLayer.batchDraw();
+  });
+
+  fieldGroup.add(selectedText);
+
+  if (!field.inserted || mode === 'export') {
+    fieldGroup.add(arrow);
+  }
+
+  return {
+    fieldGroup,
+    isFirstRender,
+  };
+};