Sharkey/src/api/endpoints/users/posts.js

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'use strict';
/**
* Module dependencies
*/
import * as mongo from 'mongodb';
import Post from '../../models/post';
import User from '../../models/user';
import serialize from '../../serializers/post';
/**
* Get posts of a user
*
* @param {Object} params
* @param {Object} me
* @return {Promise<object>}
*/
module.exports = (params, me) =>
new Promise(async (res, rej) =>
{
// Get 'user_id' parameter
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let userId = params.user_id;
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if (userId === undefined || userId === null || userId === '') {
userId = null;
}
// Get 'username' parameter
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let username = params.username;
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if (username === undefined || username === null || username === '') {
username = null;
}
if (userId === null && username === null) {
return rej('user_id or username is required');
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}
// Get 'with_replies' parameter
let withReplies = params.with_replies;
if (withReplies !== undefined && withReplies !== null && withReplies === 'true') {
withReplies = true;
} else {
withReplies = false;
}
// Get 'with_media' parameter
let withMedia = params.with_media;
if (withMedia !== undefined && withMedia !== null && withMedia === 'true') {
withMedia = true;
} else {
withMedia = false;
}
// Get 'limit' parameter
let limit = params.limit;
if (limit !== undefined && limit !== null) {
limit = parseInt(limit, 10);
// From 1 to 100
if (!(1 <= limit && limit <= 100)) {
return rej('invalid limit range');
}
} else {
limit = 10;
}
const since = params.since_id || null;
const max = params.max_id || null;
// Check if both of since_id and max_id is specified
if (since !== null && max !== null) {
return rej('cannot set since_id and max_id');
}
// Lookup user
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const user = userId !== null
? await User.findOne({ _id: new mongo.ObjectID(userId) })
: await User.findOne({ username_lower: username.toLowerCase() });
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if (user === null) {
return rej('user not found');
}
// Construct query
const sort = {
_id: -1
};
const query = {
user_id: user._id
};
if (since !== null) {
sort._id = 1;
query._id = {
$gt: new mongo.ObjectID(since)
};
} else if (max !== null) {
query._id = {
$lt: new mongo.ObjectID(max)
};
}
if (!withReplies) {
query.reply_to_id = null;
}
if (withMedia) {
query.media_ids = {
$exists: true,
$ne: null
};
}
// Issue query
const posts = await Post
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.find(query, {
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limit: limit,
sort: sort
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});
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// Serialize
res(await Promise.all(posts.map(async (post) =>
await serialize(post, me)
)));
});