feat(state): add from, to ids for edge

packages/mermaid/src/diagrams/class/classRenderer-v2.ts

@@ -4,7 +4,7 @@ import * as graphlib from 'dagre-d3-es/src/graphlib/index.js';
 import { log } from '../../logger.js';
 import { getConfig } from '../../diagram-api/diagramAPI.js';
 import { render } from '../../dagre-wrapper/index.js';
-import utils from '../../utils.js';
+import utils, { getEdgeId } from '../../utils.js';
 import { interpolateToCurve, getStylesFromArray } from '../../utils.js';
 import { setupGraphViewbox } from '../../setupGraphViewbox.js';
 import common from '../common/common.js';
@@ -231,7 +231,10 @@ export const addRelations = function (relations: ClassRelation[], g: graphlib.Gr
       //Set relationship style and line type
       classes: 'relation',
       pattern: edge.relation.lineType == 1 ? 'dashed' : 'solid',
-      id: `id_${edge.id1}_${edge.id2}_${cnt}`,
+      id: getEdgeId(edge.id1, edge.id2, {
+        prefix: 'id',
+        counter: cnt,
+      }),
       // Set link type for rendering
       arrowhead: edge.type === 'arrow_open' ? 'none' : 'normal',
       //Set edge extra labels

packages/mermaid/src/diagrams/flowchart/flowRenderer-v2.js

@@ -1,7 +1,7 @@
 import * as graphlib from 'dagre-d3-es/src/graphlib/index.js';
 import { select, curveLinear, selectAll } from 'd3';
 import { getConfig } from '../../diagram-api/diagramAPI.js';
-import utils from '../../utils.js';
+import utils, { getEdgeId } from '../../utils.js';
 import { render } from '../../dagre-wrapper/index.js';
 import { addHtmlLabel } from 'dagre-d3-es/src/dagre-js/label/add-html-label.js';
 import { log } from '../../logger.js';
@@ -210,7 +210,11 @@ export const addEdges = async function (edges, g, diagObj) {
     cnt++;
 
     // Identify Link
-    const linkIdBase = 'L-' + edge.start + '-' + edge.end;
+    const linkIdBase = getEdgeId(edge.start, edge.end, {
+      counter: cnt,
+      prefix: 'L',
+    });
+
     // count the links from+to the same node to give unique id
     if (linkIdCnt[linkIdBase] === undefined) {
       linkIdCnt[linkIdBase] = 0;
@@ -219,7 +223,8 @@ export const addEdges = async function (edges, g, diagObj) {
       linkIdCnt[linkIdBase]++;
       log.info('abc78 new entry', linkIdBase, linkIdCnt[linkIdBase]);
     }
-    let linkId = linkIdBase + '-' + linkIdCnt[linkIdBase];
+    let linkId = `${linkIdBase}_${linkIdCnt[linkIdBase]}`;
+
     log.info('abc78 new link id to be used is', linkIdBase, linkId, linkIdCnt[linkIdBase]);
     const linkNameStart = 'LS-' + edge.start;
     const linkNameEnd = 'LE-' + edge.end;

packages/mermaid/src/diagrams/flowchart/flowRenderer.js

@@ -6,7 +6,7 @@ import { applyStyle } from 'dagre-d3-es/src/dagre-js/util.js';
 import { addHtmlLabel } from 'dagre-d3-es/src/dagre-js/label/add-html-label.js';
 import { log } from '../../logger.js';
 import common, { evaluate, renderKatex } from '../common/common.js';
-import { interpolateToCurve, getStylesFromArray } from '../../utils.js';
+import { interpolateToCurve, getStylesFromArray, getEdgeId } from '../../utils.js';
 import { setupGraphViewbox } from '../../setupGraphViewbox.js';
 import flowChartShapes from './flowChartShapes.js';
 import { replaceIconSubstring } from '../../rendering-util/createText.js';
@@ -175,7 +175,10 @@ export const addEdges = async function (edges, g, diagObj) {
     cnt++;
 
     // Identify Link
-    const linkId = 'L-' + edge.start + '-' + edge.end;
+    const linkId = getEdgeId(edge.start, edge.end, {
+      counter: cnt,
+      prefix: 'L',
+    });
     const linkNameStart = 'LS-' + edge.start;
     const linkNameEnd = 'LE-' + edge.end;
 

packages/mermaid/src/diagrams/state/stateRenderer-v2.js

@@ -5,7 +5,7 @@ import { render } from '../../dagre-wrapper/index.js';
 import { log } from '../../logger.js';
 import { configureSvgSize } from '../../setupGraphViewbox.js';
 import common from '../common/common.js';
-import utils from '../../utils.js';
+import utils, { getEdgeId } from '../../utils.js';
 
 import {
   DEFAULT_DIAGRAM_DIRECTION,
@@ -252,7 +252,6 @@ const setupNode = (g, parent, parsedItem, diagramStates, diagramDb, altFlag) =>
         type: 'group',
         padding: 0, //getConfig().flowchart.padding
       };
-      graphItemCount++;
 
       const parentNodeId = itemId + PARENT_ID;
       g.setNode(parentNodeId, groupData);
@@ -270,17 +269,23 @@ const setupNode = (g, parent, parsedItem, diagramStates, diagramDb, altFlag) =>
         from = noteData.id;
         to = itemId;
       }
+
       g.setEdge(from, to, {
         arrowhead: 'none',
         arrowType: '',
         style: G_EDGE_STYLE,
         labelStyle: '',
+        id: getEdgeId(from, to, {
+          counter: graphItemCount,
+        }),
         classes: CSS_EDGE_NOTE_EDGE,
         arrowheadStyle: G_EDGE_ARROWHEADSTYLE,
         labelpos: G_EDGE_LABELPOS,
         labelType: G_EDGE_LABELTYPE,
         thickness: G_EDGE_THICKNESS,
       });
+
+      graphItemCount++;
     } else {
       g.setNode(itemId, nodeData);
     }
@@ -324,7 +329,9 @@ const setupDoc = (g, parentParsedItem, doc, diagramStates, diagramDb, altFlag) =
           setupNode(g, parentParsedItem, item.state1, diagramStates, diagramDb, altFlag);
           setupNode(g, parentParsedItem, item.state2, diagramStates, diagramDb, altFlag);
           const edgeData = {
-            id: 'edge' + graphItemCount,
+            id: getEdgeId(item.state1.id, item.state2.id, {
+              counter: graphItemCount,
+            }),
             arrowhead: 'normal',
             arrowTypeEnd: 'arrow_barb',
             style: G_EDGE_STYLE,

packages/mermaid/src/utils.ts

@@ -929,3 +929,19 @@ export const decodeEntities = function (text: string): string {
 export const isString = (value: unknown): value is string => {
   return typeof value === 'string';
 };
+
+export const getEdgeId = (
+  from: string,
+  to: string,
+  {
+    counter = 0,
+    prefix,
+    suffix,
+  }: {
+    counter?: number;
+    prefix?: string;
+    suffix?: string;
+  }
+) => {
+  return `${prefix ? `${prefix}_` : ''}${from}_${to}_${counter}${suffix ? `_${suffix}` : ''}`;
+};