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namae/api/services/slack.js

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const { send, sendError, fetch } = require('../util/http')
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module.exports = async (req, res) => {
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const { query } = req.query
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if (!query) {
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return sendError(res, new Error('no query given'))
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}
try {
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const response = await fetch(
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`https://${encodeURIComponent(query)}.slack.com`
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)
const availability = response.status !== 200
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send(res, { availability })
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} catch (err) {
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if (err.code === 'ENOTFOUND') {
send(res, true)
} else {
sendError(res, err)
}
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}
}