42 lines
1.0 KiB
TypeScript
42 lines
1.0 KiB
TypeScript
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export const parseUserId = (value: unknown): number | null => {
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if (typeof value === 'number' && Number.isFinite(value)) {
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return value
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}
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if (typeof value === 'string' && value.trim() !== '') {
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const parsed = Number(value)
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return Number.isFinite(parsed) ? parsed : null
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}
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return null
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}
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export const getUserIdFromToken = (token?: string | null): number | null => {
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if (!token) {
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return null
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}
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const parts = token.split('.')
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if (parts.length < 2) {
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return null
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}
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try {
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const payload = JSON.parse(decodeBase64Url(parts[1]))
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return parseUserId(payload?.userId)
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} catch {
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return null
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}
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return null
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}
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const decodeBase64Url = (input: string): string => {
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const normalized = input.replace(/-/g, '+').replace(/_/g, '/')
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const padded = normalized.padEnd(Math.ceil(normalized.length / 4) * 4, '=')
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const binary = atob(padded)
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let result = ''
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for (let i = 0; i < binary.length; i += 1) {
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result += String.fromCharCode(binary.charCodeAt(i))
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}
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return decodeURIComponent(escape(result))
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}
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