51 lines
1.5 KiB
Go
51 lines
1.5 KiB
Go
package main
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import (
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"context"
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"log"
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"sync"
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"git.k6n.net/mats/go-redis-inventory/pkg/inventory"
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"git.k6n.net/mats/platform/rabbit"
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"git.k6n.net/mats/slask-finder/pkg/types"
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"github.com/redis/go-redis/v9"
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)
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type StockHandler struct {
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rdb *redis.Client
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ctx context.Context
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svc inventory.RedisInventoryService
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MainStockLocationID inventory.LocationID
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// Bus producer config. conn is nil when RABBIT_HOST is unset (no bus); the
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// handler still updates Redis and just skips emitting.
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conn *rabbit.Conn
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country string
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low int64
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}
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func (s *StockHandler) HandleItem(item types.Item, wg *sync.WaitGroup) {
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wg.Go(func() {
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ctx := s.ctx
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centralStock, ok := item.GetNumberFieldValue("inStock")
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if !ok {
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centralStock = 0
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}
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sku, ok := item.GetStringFieldValue("sku")
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if !ok {
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log.Printf("unable to parse central stock for item: sku missing")
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return
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}
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// One linear pass: write the authoritative quantity, then derive and
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// emit the level crossing from the same value. No Redis pub/sub
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// round-trip — Redis stays the internal store, the bus carries levels.
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pipe := s.rdb.Pipeline()
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s.svc.UpdateInventory(ctx, pipe, inventory.SKU(sku), s.MainStockLocationID, int64(centralStock))
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if _, err := pipe.Exec(ctx); err != nil {
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log.Printf("unable to update stock: %v", err)
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return
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}
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emitLevelIfChanged(ctx, s.rdb, s.conn, s.country, s.low, sku, string(s.MainStockLocationID), int64(centralStock))
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})
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}
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