fix: move from objects to Maps

docs/config/setup/modules/mermaidAPI.md

@@ -98,7 +98,7 @@ mermaid.initialize(config);
 
 #### Defined in
 
-[mermaidAPI.ts:635](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L635)
+[mermaidAPI.ts:634](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L634)
 
 ## Functions
 
@@ -129,7 +129,7 @@ Return the last node appended
 
 #### Defined in
 
-[mermaidAPI.ts:277](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L277)
+[mermaidAPI.ts:276](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L276)
 
 ---
 
@@ -155,7 +155,7 @@ the cleaned up svgCode
 
 #### Defined in
 
-[mermaidAPI.ts:223](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L223)
+[mermaidAPI.ts:222](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L222)
 
 ---
 
@@ -167,10 +167,10 @@ Create the user styles
 
 #### Parameters
 
-| Name        | Type                                                                | Description                                                                                                               |
-| :---------- | :------------------------------------------------------------------ | :------------------------------------------------------------------------------------------------------------------------ |
-| `config`    | `MermaidConfig`                                                     | configuration that has style and theme settings to use                                                                    |
-| `classDefs` | `undefined` \| `null` \| `Record`<`string`, `DiagramStyleClassDef`> | the classDefs in the diagram text. Might be null if none were defined. Usually is the result of a call to getClasses(...) |
+| Name        | Type                                                             | Description                                                                                                               |
+| :---------- | :--------------------------------------------------------------- | :------------------------------------------------------------------------------------------------------------------------ |
+| `config`    | `MermaidConfig`                                                  | configuration that has style and theme settings to use                                                                    |
+| `classDefs` | `undefined` \| `null` \| `Map`<`string`, `DiagramStyleClassDef`> | the classDefs in the diagram text. Might be null if none were defined. Usually is the result of a call to getClasses(...) |
 
 #### Returns
 
@@ -190,20 +190,20 @@ the string with all the user styles
 
 #### Parameters
 
-| Name        | Type                                                      |
-| :---------- | :-------------------------------------------------------- |
-| `config`    | `MermaidConfig`                                           |
-| `graphType` | `string`                                                  |
-| `classDefs` | `undefined` \| `Record`<`string`, `DiagramStyleClassDef`> |
-| `svgId`     | `string`                                                  |
+| Name        | Type                                                   |
+| :---------- | :----------------------------------------------------- |
+| `config`    | `MermaidConfig`                                        |
+| `graphType` | `string`                                               |
+| `classDefs` | `undefined` \| `Map`<`string`, `DiagramStyleClassDef`> |
+| `svgId`     | `string`                                               |
 
 #### Returns
 
 `string`
 
 #### Defined in
 
-[mermaidAPI.ts:200](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L200)
+[mermaidAPI.ts:199](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L199)
 
 ---
 
@@ -256,7 +256,7 @@ Put the svgCode into an iFrame. Return the iFrame code
 
 #### Defined in
 
-[mermaidAPI.ts:254](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L254)
+[mermaidAPI.ts:253](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L253)
 
 ---
 
@@ -281,4 +281,4 @@ Remove any existing elements from the given document
 
 #### Defined in
 
-[mermaidAPI.ts:327](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L327)
+[mermaidAPI.ts:326](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L326)

packages/mermaid-flowchart-elk/src/flowRenderer-elk.js

@@ -41,12 +41,12 @@
 export const addVertices = async function (vert, svgId, root, doc, diagObj, parentLookupDb, graph) {
   const svg = root.select(`[id="${svgId}"]`);
   const nodes = svg.insert('g').attr('class', 'nodes');
-  const keys = Object.keys(vert);
+  const keys = [...vert.keys()];
 
   // Iterate through each item in the vertex object (containing all the vertices found) in the graph definition
   await Promise.all(
     keys.map(async function (id) {
-      const vertex = vert[id];
+      const vertex = vert.get(id);
 
       /**
        * Variable for storing the classes for the vertex
@@ -64,7 +64,7 @@
       let vertexText = vertex.text !== undefined ? vertex.text : vertex.id;
 
       // We create a SVG label, either by delegating to addHtmlLabel or manually
       let vertexNode;
       const labelData = { width: 0, height: 0 };
 
       const ports = [
@@ -188,7 +188,7 @@
         nodeEl = await insertNode(nodes, node, vertex.dir);
         boundingBox = nodeEl.node().getBBox();
       } else {
         const svgLabel = doc.createElementNS('http://www.w3.org/2000/svg', 'text');
         // svgLabel.setAttribute('style', styles.labelStyle.replace('color:', 'fill:'));
         // const rows = vertexText.split(common.lineBreakRegex);
         // for (const row of rows) {
@@ -394,7 +394,7 @@
  * Add edges to graph based on parsed graph definition
  *
  * @param {object} edges The edges to add to the graph
  * @param {object} g The graph object
  * @param cy
  * @param diagObj
  * @param graph
@@ -595,7 +595,7 @@
  *
  * @param text
  * @param diagObj
- * @returns {Record<string, import('../../mermaid/src/diagram-api/types.js').DiagramStyleClassDef>} ClassDef styles
+ * @returns {Map<string, import('../../mermaid/src/diagram-api/types.js').DiagramStyleClassDef>} ClassDef styles
  */
 export const getClasses = function (text, diagObj) {
   log.info('Extracting classes');
@@ -677,7 +677,7 @@
 /**
  * Recursive function that iterates over an array of nodes and inserts the children of each node.
  * It also recursively populates the inserts the children of the children and so on.
  * @param {*} graph
  * @param nodeArray
  * @param parentLookupDb
  */

packages/mermaid/src/diagram-api/types.ts

@@ -70,7 +70,7 @@ export interface DiagramRenderer {
   getClasses?: (
     text: string,
     diagram: Pick<DiagramDefinition, 'db'>
-  ) => Record<string, DiagramStyleClassDef>;
+  ) => Map<string, DiagramStyleClassDef>;
 }
 
 export interface DiagramDefinition {

packages/mermaid/src/diagrams/block/blockDB.ts

@@ -6,16 +6,16 @@ import { clear as commonClear } from '../common/commonDb.js';
 import type { Block, ClassDef } from './blockTypes.js';
 
 // Initialize the node database for simple lookups
-let blockDatabase: Record<string, Block> = {};
+let blockDatabase: Map<string, Block> = new Map();
 let edgeList: Block[] = [];
-let edgeCount: Record<string, number> = {};
+let edgeCount: Map<string, number> = new Map();
 
 const COLOR_KEYWORD = 'color';
 const FILL_KEYWORD = 'fill';
 const BG_FILL = 'bgFill';
 const STYLECLASS_SEP = ',';
 
-let classes = {} as Record<string, ClassDef>;
+let classes: Map<string, ClassDef> = new Map();
 
 /**
  * Called when the parser comes across a (style) class definition
@@ -26,10 +26,11 @@ let classes = {} as Record<string, ClassDef>;
  */
 export const addStyleClass = function (id: string, styleAttributes = '') {
   // create a new style class object with this id
-  if (classes[id] === undefined) {
-    classes[id] = { id: id, styles: [], textStyles: [] }; // This is a classDef
+  let foundClass = classes.get(id);
+  if (!foundClass) {
+    foundClass = { id: id, styles: [], textStyles: [] };
+    classes.set(id, foundClass); // This is a classDef
   }
-  const foundClass = classes[id];
   if (styleAttributes !== undefined && styleAttributes !== null) {
     styleAttributes.split(STYLECLASS_SEP).forEach((attrib) => {
       // remove any trailing ;
@@ -54,7 +55,7 @@ export const addStyleClass = function (id: string, styleAttributes = '') {
  * @param styles - the string with 1 or more style attributes (each separated by a comma)
  */
 export const addStyle2Node = function (id: string, styles = '') {
-  const foundBlock = blockDatabase[id];
+  const foundBlock = blockDatabase.get(id)!;
   if (styles !== undefined && styles !== null) {
     foundBlock.styles = styles.split(STYLECLASS_SEP);
   }
@@ -70,11 +71,11 @@ export const addStyle2Node = function (id: string, styles = '') {
  */
 export const setCssClass = function (itemIds: string, cssClassName: string) {
   itemIds.split(',').forEach(function (id: string) {
-    let foundBlock = blockDatabase[id];
+    let foundBlock = blockDatabase.get(id);
     if (foundBlock === undefined) {
       const trimmedId = id.trim();
-      blockDatabase[trimmedId] = { id: trimmedId, type: 'na', children: [] } as Block;
-      foundBlock = blockDatabase[trimmedId];
+      foundBlock = { id: trimmedId, type: 'na', children: [] } as Block;
+      blockDatabase.set(trimmedId, foundBlock);
     }
     if (!foundBlock.classes) {
       foundBlock.classes = [];
@@ -104,12 +105,9 @@ const populateBlockDatabase = (_blockList: Block[] | Block[][], parent: Block):
     if (block.type === 'column-setting') {
       parent.columns = block.columns || -1;
     } else if (block.type === 'edge') {
-      if (edgeCount[block.id]) {
-        edgeCount[block.id]++;
-      } else {
-        edgeCount[block.id] = 1;
-      }
-      block.id = edgeCount[block.id] + '-' + block.id;
+      const count = (edgeCount.get(block.id) ?? 0) + 1;
+      edgeCount.set(block.id, count);
+      block.id = count + '-' + block.id;
       edgeList.push(block);
     } else {
       if (!block.label) {
@@ -120,16 +118,17 @@ const populateBlockDatabase = (_blockList: Block[] | Block[][], parent: Block):
           block.label = block.id;
         }
       }
-      const newBlock = !blockDatabase[block.id];
-      if (newBlock) {
-        blockDatabase[block.id] = block;
+      const existingBlock = blockDatabase.get(block.id);
+
+      if (existingBlock === undefined) {
+        blockDatabase.set(block.id, block);
       } else {
         // Add newer relevant data to aggregated node
         if (block.type !== 'na') {
-          blockDatabase[block.id].type = block.type;
+          existingBlock.type = block.type;
         }
         if (block.label !== block.id) {
-          blockDatabase[block.id].label = block.label;
+          existingBlock.label = block.label;
         }
       }
 
@@ -142,10 +141,10 @@ const populateBlockDatabase = (_blockList: Block[] | Block[][], parent: Block):
         for (let j = 0; j < w; j++) {
           const newBlock = clone(block);
           newBlock.id = newBlock.id + '-' + j;
-          blockDatabase[newBlock.id] = newBlock;
+          blockDatabase.set(newBlock.id, newBlock);
           children.push(newBlock);
         }
-      } else if (newBlock) {
+      } else if (existingBlock === undefined) {
         children.push(block);
       }
     }
@@ -160,12 +159,12 @@ const clear = (): void => {
   log.debug('Clear called');
   commonClear();
   rootBlock = { id: 'root', type: 'composite', children: [], columns: -1 } as Block;
-  blockDatabase = { root: rootBlock };
+  blockDatabase = new Map([['root', rootBlock]]);
   blocks = [] as Block[];
-  classes = {} as Record<string, ClassDef>;
+  classes = new Map();
 
   edgeList = [];
-  edgeCount = {};
+  edgeCount = new Map();
 };
 
 export function typeStr2Type(typeStr: string) {
@@ -241,7 +240,7 @@ const setHierarchy = (block: Block[]): void => {
 };
 
 const getColumns = (blockId: string): number => {
-  const block = blockDatabase[blockId];
+  const block = blockDatabase.get(blockId);
   if (!block) {
     return -1;
   }
@@ -259,7 +258,7 @@ const getColumns = (blockId: string): number => {
  * @returns
  */
 const getBlocksFlat = () => {
-  return [...Object.values(blockDatabase)];
+  return [...blockDatabase.values()];
 };
 /**
  * Returns the hierarchy of blocks
@@ -273,11 +272,11 @@ const getEdges = () => {
   return edgeList;
 };
 const getBlock = (id: string) => {
-  return blockDatabase[id];
+  return blockDatabase.get(id);
 };
 
 const setBlock = (block: Block) => {
-  blockDatabase[block.id] = block;
+  blockDatabase.set(block.id, block);
 };
 
 const getLogger = () => console;

packages/mermaid/src/diagrams/block/parser/block.spec.ts

@@ -388,7 +388,7 @@ describe('Block diagram', function () {
       const mc = blocks[0];
       expect(mc.classes).toContain('black');
       const classes = db.getClasses();
-      const black = classes.black;
+      const black = classes.get('black')!;
       expect(black.id).toBe('black');
       expect(black.styles[0]).toEqual('color:#ffffff');
     });
@@ -406,4 +406,21 @@ columns 1
       expect(B.styles).toContain('fill:#f9F');
     });
   });
+
+  describe('prototype properties', function () {
+    function validateProperty(prop: string) {
+      expect(() => block.parse(`block-beta\n${prop}`)).not.toThrow();
+      expect(() =>
+        block.parse(`block-beta\nA; classDef ${prop} color:#ffffff,fill:#000000; class A ${prop}`)
+      ).not.toThrow();
+    }
+
+    it('should work with a __proto__ property', function () {
+      validateProperty('__proto__');
+    });
+
+    it('should work with a constructor property', function () {
+      validateProperty('constructor');
+    });
+  });
 });