ignore: v2 experiments
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@@ -27,16 +27,16 @@ export namespace Identifier {
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let counter = 0
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export function ascending(prefix: keyof typeof prefixes, given?: string) {
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return generateID(prefix, false, given)
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return generateID(prefix, "ascending", given)
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}
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export function descending(prefix: keyof typeof prefixes, given?: string) {
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return generateID(prefix, true, given)
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return generateID(prefix, "descending", given)
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}
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function generateID(prefix: keyof typeof prefixes, descending: boolean, given?: string): string {
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function generateID(prefix: keyof typeof prefixes, direction: "descending" | "ascending", given?: string): string {
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if (!given) {
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return create(prefix, descending)
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return create(prefixes[prefix], direction)
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}
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if (!given.startsWith(prefixes[prefix])) {
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@@ -55,7 +55,7 @@ export namespace Identifier {
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return result
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}
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export function create(prefix: keyof typeof prefixes, descending: boolean, timestamp?: number): string {
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export function create(prefix: string, direction: "descending" | "ascending", timestamp?: number): string {
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const currentTimestamp = timestamp ?? Date.now()
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if (currentTimestamp !== lastTimestamp) {
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@@ -66,14 +66,14 @@ export namespace Identifier {
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let now = BigInt(currentTimestamp) * BigInt(0x1000) + BigInt(counter)
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now = descending ? ~now : now
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now = direction === "descending" ? ~now : now
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const timeBytes = Buffer.alloc(6)
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for (let i = 0; i < 6; i++) {
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timeBytes[i] = Number((now >> BigInt(40 - 8 * i)) & BigInt(0xff))
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}
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return prefixes[prefix] + "_" + timeBytes.toString("hex") + randomBase62(LENGTH - 12)
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return prefix + "_" + timeBytes.toString("hex") + randomBase62(LENGTH - 12)
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}
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/** Extract timestamp from an ascending ID. Does not work with descending IDs. */
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