c62e4c0577
- Added dotenv configuration for environment variables - Fixed MongoDB connection string loading - Configured server port to 3005 - Updated cron jobs for expired messages
57 lines
1.8 KiB
JavaScript
57 lines
1.8 KiB
JavaScript
const { validateUsername, USERNAME_MAX_LENGTH } = require('./usernameValidation')
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const escapeRegex = (value) => value.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
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const isUsernameTaken = async (UserModel, userName, excludeUserId) => {
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const existing = await UserModel.findOne({
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user_name: { $regex: new RegExp(`^${escapeRegex(userName)}$`, 'i') }
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})
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if (!existing) return false
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if (excludeUserId && existing._id.toString() === excludeUserId) return false
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return true
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}
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const buildCandidates = (base, attempt) => {
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const random2 = () => String(Math.floor(Math.random() * 90 + 10))
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const random3 = () => String(Math.floor(Math.random() * 900 + 100))
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const random4 = () => String(Math.floor(Math.random() * 9000 + 1000))
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const builders = [
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() => `${base}_${random2()}`,
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() => `${base}.${random2()}`,
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() => `${base}${random3()}`,
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() => `${base}-${random2()}`,
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() => `${base}_${random3()}`,
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() => `${base}${random4()}`,
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]
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return builders[attempt % builders.length]()
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}
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const trimToMax = (value) =>
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value.length > USERNAME_MAX_LENGTH ? value.slice(0, USERNAME_MAX_LENGTH) : value
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const generateUsernameSuggestions = async (UserModel, baseUserName, excludeUserId) => {
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const base = trimToMax(baseUserName.trim().toLowerCase())
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const suggestions = []
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let attempt = 0
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while (suggestions.length < 3 && attempt < 30) {
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const candidate = trimToMax(buildCandidates(base, attempt))
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attempt += 1
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if (validateUsername(candidate)) continue
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if (suggestions.includes(candidate)) continue
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if (await isUsernameTaken(UserModel, candidate, excludeUserId)) continue
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suggestions.push(candidate)
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}
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return suggestions
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}
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module.exports = {
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generateUsernameSuggestions,
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}
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