47 lines
1.2 KiB
Lua
47 lines
1.2 KiB
Lua
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-- Atomic ticket purchase script
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-- KEYS[1]: event tickets key (e.g., "event:1:tickets")
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-- KEYS[2]: event metadata key (e.g., "event:1:meta")
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-- KEYS[3]: global stats key ("global:stats")
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-- ARGV[1]: timestamp
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-- ARGV[2]: purchase ID (UUID)
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local ticketKey = KEYS[1]
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local metaKey = KEYS[2]
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local globalKey = KEYS[3]
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local timestamp = ARGV[1]
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local purchaseId = ARGV[2]
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-- Check if event exists
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if redis.call('EXISTS', metaKey) == 0 then
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return {nil, "EVENT_NOT_FOUND"}
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end
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-- Atomically pop a ticket from the list
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local ticket = redis.call('LPOP', ticketKey)
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if not ticket then
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return {nil, "NO_TICKETS_AVAILABLE"}
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end
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-- Update event metadata
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local soldCount = redis.call('HINCRBY', metaKey, 'soldTickets', 1)
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redis.call('HSET', metaKey, 'lastSoldAt', timestamp)
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-- Update global stats
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redis.call('HINCRBY', globalKey, 'totalSold', 1)
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-- Store purchase record
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local purchaseKey = 'purchase:' .. purchaseId
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redis.call('HSET', purchaseKey, {
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'ticketId', ticket,
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'eventId', string.match(ticketKey, 'event:(%d+):tickets'),
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'purchaseId', purchaseId,
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'timestamp', timestamp,
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'status', 'completed'
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})
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-- Set expiration for purchase record (24 hours)
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redis.call('EXPIRE', purchaseKey, 86400)
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return {ticket, "SUCCESS", soldCount}
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