How to add main post content of topic to topic lists?

[nullpointer]

Hello, I am creating a custom frontend using nodebb API. I want to get all the topics inside a category, along with the main post of that topic. Currently I can get all the topics inside a category using this endpoint:

http://localhost:4567/api/category/1

And I got this json response:

  ...
  ...

"topics": [
		{
			"cid": 1,
			"lastposttime": 1670832226781,
			"mainPid": 7,
			"postcount": 4,
			"slug": "5/bbca-mencapai-ath-di-harga-9000",
			"tid": 5,
			"timestamp": 1670829972612,
			"title": "$BBCA mencapai ATH di harga 9000",
			"uid": 3,
			"viewcount": 11,
			"postercount": 3,
			"teaserPid": 11,

  ...
  ...

This response only give me the mainPid that forces me to make another API call to get the post detail content. How can I modify this response, so I can get the whole content of the main post (not only the mainPid)? or at least the complete post content?

Please give me some advice. Thank you.

[baris]

This is fairly easy to do in a plugin by using the hook filter:topics.get. This hook gets triggered whenever a list of topics is loaded. So you will have to add the parsed post content of mainPid to each topic object. Here is some sample code that does that.

const posts = require.main.require('./src/posts');
myPlugin.filterTopicsGet = async function (hookData) {
	// get all mainPids
	const mainPids = hookData.topics.map(t => t.mainPid);
	// load all mainPosts
	const mainPosts = await posts.getPostsByPids(mainPids, hookData.uid);
	// set a mainPost object on all topics returned
	hookData.topics.forEach((topic, index) => {
		topic.mainPost = mainPosts[index];
	});
	return hookData;
};

Once you have a plugin with that hook, you should see a mainPost object inside each topic object on places like /recent and /category/1.

[nullpointer]

@baris thank you! I'll try your solution and update here