fix(html): fixed un-parsing

packages/html-parser/src/index.ts

@@ -275,6 +275,10 @@ export class HtmlMessageEntityParser implements IMessageEntityParser {
         if (!text) return text
         if (!entities.length || entities.length === entitiesOffset) {
             return HtmlMessageEntityParser.escape(text)
+                .replace(/\n/g, '<br>')
+                .replace(/ {2,}/g, (match) => {
+                    return '&nbsp;'.repeat(match.length)
+                })
         }
 
         const end = offset + length
@@ -314,15 +318,22 @@ export class HtmlMessageEntityParser implements IMessageEntityParser {
             const substr = text.substr(relativeOffset, length)
             if (!substr) continue
 
-            const entityText = this._unparse(
+            const type = entity.type
+
+            let entityText
+
+            if (type === 'pre') {
+                entityText = substr
+            } else {
+                entityText = this._unparse(
                     substr,
                     entities,
                     i + 1,
                     offset + relativeOffset,
                     length
                 )
+            }
 
-            const type = entity.type
             switch (type) {
                 case 'bold':
                 case 'italic':
@@ -339,7 +350,7 @@ export class HtmlMessageEntityParser implements IMessageEntityParser {
                                 ? ` language="${entity.language}"`
                                 : ''
                         }>${
-                            this._syntaxHighlighter
+                            this._syntaxHighlighter && entity.language
                                 ? this._syntaxHighlighter(
                                       entityText,
                                       entity.language!

packages/html-parser/tests/html-parser.spec.ts

@@ -253,17 +253,27 @@ describe('HtmlMessageEntityParser', () => {
                     }),
                     createEntity('messageEntityPre', 35, 9, { language: '' }),
                 ],
-                'plain <pre language="javascript">lang: <b>javascript</b><br>console.log("Hello, world!")</pre> <pre>lang: <b></b><br>some code</pre> plain',
+                'plain <pre language="javascript">lang: <b>javascript</b><br>console.log("Hello, world!")</pre> <pre>some code</pre> plain',
                 parser
             )
         })
 
-        it('should replace newlines with <br>', () => {
+        it('should replace newlines with <br> outside pre', () => {
             test(
                 'plain\n\nplain',
                 [],
                 'plain<br><br>plain'
             )
+            test(
+                'plain\n\nplain',
+                [createEntity('messageEntityBold', 0, 12)],
+                '<b>plain<br><br>plain</b>'
+            )
+            test(
+                'plain\n\nplain',
+                [createEntity('messageEntityPre', 0, 12)],
+                '<pre>plain\n\nplain</pre>'
+            )
         })
 
         it('should replace multiple spaces with &nbsp;', () => {