| 1 | package workspacestate |
| 2 | |
| 3 | import ( |
| 4 | "crypto/sha256" |
| 5 | "fmt" |
| 6 | "slices" |
| 7 | "strings" |
| 8 | ) |
| 9 | |
| 10 | // Source identities written before physical-path normalization remain durable |
| 11 | // receipts. Add read aliases without rewriting their keys or operation journals. |
| 12 | type sourceIdentityIndex struct { |
| 13 | aliases map[string][]string |
| 14 | owners map[string][]string |
| 15 | } |
| 16 | |
| 17 | func newSourceIdentityIndex(state State) *sourceIdentityIndex { |
| 18 | index := &sourceIdentityIndex{aliases: map[string][]string{}, owners: map[string][]string{}} |
| 19 | paths := map[string]string{} |
| 20 | add := func(mapping SourceMapping, committed bool) { |
| 21 | key := mapping.SourceKey |
| 22 | if key == "" { |
| 23 | return |
| 24 | } |
| 25 | keys, known := index.aliases[key] |
| 26 | if !known { |
| 27 | keys = []string{key} |
| 28 | path, resolved := paths[mapping.Path] |
| 29 | if !resolved { |
| 30 | path, _ = sourcePathKey(mapping.Path) |
| 31 | paths[mapping.Path] = path |
| 32 | } |
| 33 | if path != "" { |
| 34 | heads := []string{mapping.HeadID} |
| 35 | // Old lineage receipts kept the originating head for a single-session |
| 36 | // directory; discovery uses no head. Legacy DAG heads stay distinct. |
| 37 | if mapping.Format == "canonical" && mapping.HeadID != "" { |
| 38 | heads = append(heads, "") |
| 39 | } |
| 40 | for _, head := range heads { |
| 41 | normalized := fmt.Sprintf("%x", sha256.Sum256([]byte(path+"\x00"+head))) |
| 42 | if _, version, found := strings.Cut(key, ":review:"); found { |
| 43 | normalized += ":review:" + version |
| 44 | } |
| 45 | if normalized != key { |
| 46 | keys = append(keys, normalized) |
| 47 | } |
| 48 | } |
| 49 | } |
| 50 | index.aliases[key] = keys |
| 51 | } |
| 52 | if committed { |
| 53 | for _, alias := range keys { |
| 54 | index.owners[alias] = append(index.owners[alias], key) |
| 55 | } |
| 56 | } |
| 57 | } |
| 58 | for _, mapping := range state.SourceMappings { |
| 59 | add(mapping, true) |
| 60 | } |
| 61 | for _, op := range state.PendingOperations { |
| 62 | if op.Mapping != nil { |
| 63 | add(*op.Mapping, false) |
| 64 | } |
| 65 | } |
| 66 | return index |
| 67 | } |
| 68 | |
| 69 | func (s State) sourceIdentityIndex() *sourceIdentityIndex { |
| 70 | if s.sourceIdentities != nil { |
| 71 | return s.sourceIdentities |
| 72 | } |
| 73 | return newSourceIdentityIndex(s) |
| 74 | } |
| 75 | |
| 76 | // SourceKeys returns durable storage and current lookup identities. Legacy DAG |
| 77 | // heads and reviewed versions remain independent from their parent source. |
| 78 | func (s State) SourceKeys(key string) []string { |
| 79 | keys := s.sourceIdentityIndex().aliases[key] |
| 80 | if len(keys) == 0 { |
| 81 | return []string{key} |
| 82 | } |
| 83 | return slices.Clone(keys) |
| 84 | } |
| 85 | |
| 86 | // ResolveSource rejects ambiguous normalized ownership instead of choosing a |
| 87 | // destination or admitting another import. Exact durable keys remain usable. |
| 88 | func (s State) ResolveSource(key string) (SourceMapping, bool, error) { |
| 89 | if mapping, ok := s.SourceMappings[key]; ok { |
| 90 | return cloneSourceMapping(mapping), true, nil |
| 91 | } |
| 92 | var result SourceMapping |
| 93 | found := false |
| 94 | for _, owner := range s.sourceIdentityIndex().owners[key] { |
| 95 | mapping, exists := s.SourceMappings[owner] |
| 96 | if !exists { |
| 97 | continue |
| 98 | } |
| 99 | if found && (result.SessionID != mapping.SessionID || result.WorkspaceID != mapping.WorkspaceID || result.Fingerprint != mapping.Fingerprint) { |
| 100 | return SourceMapping{}, false, ErrMutationConflict |
| 101 | } |
| 102 | if !found || mapping.SourceKey < result.SourceKey { |
| 103 | result = mapping |
| 104 | } |
| 105 | found = true |
| 106 | } |
| 107 | return cloneSourceMapping(result), found, nil |
| 108 | } |
| 109 |