Handlebars and patcher functions

[akiross]

Hello, lately I've been using docx and it has been very helpful, so thank you!

Since I'm mostly doing templating with it, I was wondering how complex the template language can get. I saw handlebars is mentioned, but I don't see that being used in the code, so all the powerful template language is not available. Would be possible to use that as a template mechanism?

As alternative, I think being able to use a function instead of a string would also be very powerful. So, instead of having a patcher like

doc = await patchDocument(data, {
  outputType: 'nodebuffer',
  patches: {
    key: { type: PatchType.PARAGRAPH, children: [new TextRun("foo")] }
  }
})

having a function instead of a map could provide great flexibility:

doc = await patchDocument(data, {
  outputType: 'nodebuffer',
  patchFunction: (patchString) => {
    if (patchString === "key")
    return { type: PatchType.PARAGRAPH, children: [new TextRun("foo")] };
  }
})

In my case, I have many values in a context and I would like to replace them whenever they appear in the document, possibly combining the values. Having a function would allow me to pick the values and combine them on the fly, even using a mini-language like

patchFunction: (patchString) => {
  if (patchString == "foo") return { ... TextRun("123") }
  if (patchString == "bar") return { ... TextRun("456") }
  if (patchString == "foo+bar") return { ... TextRun(String(123 + 456)) }
}

What do you think?
Thanks again for docx!