Carlos Florêncio
51 lines
1.2 KiB
Go
51 lines
1.2 KiB
Go
package messagequeue
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import (
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"encoding/json"
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"errors"
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)
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// ErrInvalidQueueAdmissionIDs reports malformed internal provenance metadata.
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// A merge must leave both queue entries untouched when its provenance cannot
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// be normalized safely.
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var ErrInvalidQueueAdmissionIDs = errors.New("invalid queue admission IDs")
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func unionQueueAdmissionIDs(target, source map[string]interface{}) ([]string, bool) {
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seen := make(map[string]struct{})
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var union []string
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for _, metadata := range []map[string]interface{}{target, source} {
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ids, ok := normalizeQueueAdmissionIDs(metadata[MetadataQueueAdmissionIDs])
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if !ok {
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return nil, false
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}
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for _, id := range ids {
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if _, duplicate := seen[id]; duplicate {
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continue
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}
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seen[id] = struct{}{}
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union = append(union, id)
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}
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}
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return union, true
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}
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func normalizeQueueAdmissionIDs(raw interface{}) ([]string, bool) {
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if raw == nil {
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return nil, true
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}
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encoded, err := json.Marshal(raw)
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if err != nil {
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return nil, false
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}
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var ids []string
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if err := json.Unmarshal(encoded, &ids); err != nil {
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return nil, false
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}
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for _, id := range ids {
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if id == "" {
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return nil, false
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}
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}
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return ids, true
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}
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