| 1 | package seeds |
| 2 | |
| 3 | import ( |
| 4 | "bytes" |
| 5 | "context" |
| 6 | "encoding/json" |
| 7 | "errors" |
| 8 | "fmt" |
| 9 | "io" |
| 10 | "os" |
| 11 | |
| 12 | "github.com/carlosframework/platform/internal/release" |
| 13 | ) |
| 14 | |
| 15 | // LegacyOwnersKey is the operator assignment of legacy route names |
| 16 | // (seeded-instances spec §6.4, codex 9): which account and app a route |
| 17 | // filed under the operator account belongs to. |
| 18 | const LegacyOwnersKey = "control/legacy-route-owners.json" |
| 19 | |
| 20 | // legacyOwnersVersion is the only file version this reader understands. |
| 21 | const legacyOwnersVersion = 1 |
| 22 | |
| 23 | // LegacyOwner is the account and app a legacy route name is assigned to. |
| 24 | type LegacyOwner struct { |
| 25 | Account string `json:"account"` |
| 26 | App string `json:"app"` |
| 27 | } |
| 28 | |
| 29 | // LegacyOwners maps a route name, as filed under the operator account, to |
| 30 | // the one account and app it belongs to. |
| 31 | type LegacyOwners struct { |
| 32 | V int `json:"v"` |
| 33 | Names map[string]LegacyOwner `json:"names"` |
| 34 | } |
| 35 | |
| 36 | // ReadLegacyOwners reads the assignments. It is an authority check, so it |
| 37 | // fails closed: an absent file is an empty set (nothing is assigned), but a |
| 38 | // file that is present and unreadable, malformed, of an unknown version or |
| 39 | // carrying an incomplete entry is an error and no owners, never "no |
| 40 | // assignment". The etag is "" for an absent file. |
| 41 | func ReadLegacyOwners(ctx context.Context, s release.Store) (*LegacyOwners, string, error) { |
| 42 | body, etag, err := s.Get(ctx, LegacyOwnersKey) |
| 43 | if errors.Is(err, os.ErrNotExist) { |
| 44 | return &LegacyOwners{V: legacyOwnersVersion, Names: map[string]LegacyOwner{}}, "", nil |
| 45 | } |
| 46 | if err != nil { |
| 47 | return nil, "", fmt.Errorf("seeds: read legacy route owners: %w", err) |
| 48 | } |
| 49 | dec := json.NewDecoder(bytes.NewReader(body)) |
| 50 | dec.DisallowUnknownFields() |
| 51 | var o LegacyOwners |
| 52 | if err := dec.Decode(&o); err != nil { |
| 53 | return nil, "", fmt.Errorf("seeds: parse legacy route owners: %w", err) |
| 54 | } |
| 55 | if _, err := dec.Token(); err != io.EOF { |
| 56 | return nil, "", errors.New("seeds: parse legacy route owners: data after the object") |
| 57 | } |
| 58 | if o.V != legacyOwnersVersion { |
| 59 | return nil, "", fmt.Errorf("seeds: legacy route owners: unknown version %d", o.V) |
| 60 | } |
| 61 | if o.Names == nil { |
| 62 | o.Names = map[string]LegacyOwner{} |
| 63 | } |
| 64 | for name, ow := range o.Names { |
| 65 | if name == "" || ow.Account == "" || ow.App == "" { |
| 66 | return nil, "", fmt.Errorf("seeds: legacy route owners: incomplete entry %q", name) |
| 67 | } |
| 68 | } |
| 69 | return &o, etag, nil |
| 70 | } |
| 71 | |
| 72 | // Lookup returns the owner assigned to name. A name that is not in the set |
| 73 | // is not assigned. |
| 74 | func (o *LegacyOwners) Lookup(name string) (LegacyOwner, bool) { |
| 75 | if o == nil { |
| 76 | return LegacyOwner{}, false |
| 77 | } |
| 78 | v, ok := o.Names[name] |
| 79 | return v, ok |
| 80 | } |
| 81 | |
amadan