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Implement FormattedString method #26

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Implement FormattedString method #26

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36 changes: 36 additions & 0 deletions src/format.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,42 @@ class FormattedString implements Stringable {
this.entities = entities;
}

/**
* Replaces matches of a pattern with a replacement string
*
* @param searchValue The pattern to search for
* @param replaceValue The string to replace the pattern with
* @returns A new `FormattedString` with replacements
*/
replace(searchValue: string | RegExp, replaceValue: string): FormattedString {
const newText = this.text.replace(searchValue, replaceValue);

const newEntities = this.entities.map(entity => {
const newEntity = { ...entity };

if (typeof searchValue === 'string') {
const index = this.text.indexOf(searchValue);

if (index !== -1 && index < newEntity.offset + newEntity.length) {
newEntity.offset = newEntity.offset + replaceValue.length - searchValue.length;
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Thanks for the PQ!

Please consider this counterexample test case in your next commit.

bot.command('start', async ctx => {
  const msg = fmt`I like the grammY ${code('framework')} very much`;

  const newMsg = msg.replace('framework', 'library');

  await ctx.replyFmt(newMsg);
});

Result:
Screenshot 2024-06-02 at 10 45 35 AM

}
} else {
const match = this.text.match(searchValue);

if (match) {
const index = match.index!;
if (index !== -1 && index < newEntity.offset + newEntity.length) {
newEntity.offset = newEntity.offset + replaceValue.length - match[0].length;
}
}
}

return newEntity;
});

return new FormattedString(newText, newEntities);
}

/**
* Returns the string representation of this object
*/
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