Šķîþ ţö ḿàîñ çöñţéñţ

Çöñţéñţ Šţöŕé

Ţĥé Çöñţéñţ Šţöŕé þŕöṽîđéš ṽéŕšîöñéđ, çöñţéñţ-àđđŕéššàƃļé þéŕšîšţéñçé ƒöŕ çöñţéñţ. Îţ šéŕṽéš àš ţĥé çéñţŕàļ þéŕšîšţéñçé ļàýéŕ ƒöŕ neokapi þŕöĵéçţš.

Àŕçĥîţéçţüŕé​

Ţĥé šţöŕé šîţš ƃéţŵééñ çöññéçţöŕš (ŵĥîçĥ þüļļ/þüšĥ éẋţéŕñàļ çöñţéñţ) àñđ ţĥé þŕöçéššîñĝ þîþéļîñé (ƒļöŵš, ţööļš, çöñţéñţ ḿéḿöŕý, ţéŕḿš):

Connectors → ContentStore ← → Flows/Tools
                  ↕
              Versions

Ķéý Çöñçéþţš​

  • ƂļöçķÎđéñţîţý: çöñţéñţ-àđđŕéššàƃļé ĥàšĥîñĝ (ŠĤÀ-256) ƒöŕ ƃļöçķ đéđüþļîçàţîöñ àñđ çĥàñĝé đéţéçţîöñ
  • ÇöñţéñţŔéƒ: ļîñķš ƃļöçķš ţö ţĥéîŕ éẋţéŕñàļ çöññéçţöŕ šöüŕçé ŵîţĥ šýñç ţŕàçķîñĝ
  • ĐîšþļàýĤîñţ: ÜÎ ŕéñđéŕîñĝ ĝüîđàñçé (þŕéṽîéŵ, çöñţéẋţ, ḿàẋ ļéñĝţĥ, çöñţéñţ ţýþé)
  • Ṽéŕšîöñ: ñàḿéđ šñàþšĥöţ öƒ þŕöĵéçţ šţàţé ŵîţĥ ƃļöçķ-ļéṽéļ đîñĝ

ÇöñţéñţŠţöŕé Îñţéŕƒàçé​

ContentStore (bowrain/core/store/store.go) îš ţĥé üñîöñ öƒ ŕöļé îñţéŕƒàçéš, öñé þéŕ çöñçéŕñ. Àļļ çöñţéñţ öþéŕàţîöñš àŕé šţŕéàḿ-šçöþéđ: àñ éḿþţý šţŕéàḿ ñàḿé đéƒàüļţš ţö "main", ŵĥîçĥ éṽéŕý þŕöĵéçţ îḿþļîçîţļý ĥàš.

// ContentStore is the primary persistence interface for content,
// the union of the role interfaces. All content operations are stream-scoped.
type ContentStore interface {
    ProjectStore    // projects: create, get, list, update, delete
    StreamStore     // streams within a project
    CollectionStore // collections (stream-scoped)
    ItemStore       // items (stream-scoped)
    BlockStore      // blocks, notes, history (stream-scoped)
    VersionStore    // named versions + diffs (stream-scoped)
    ChangeFeed      // incremental sync change log (stream-scoped)
    AssetStore      // assets and locale variants

    Close() error
}

Ŕéþŕéšéñţàţîṽé šîĝñàţüŕéš; ñöţé ţĥé stream þàŕàḿéţéŕ ţĥŕöüĝĥöüţ:

// BlockStore
StoreBlocks(ctx context.Context, projectID, stream string, blocks []*model.Block) error
GetBlocks(ctx context.Context, query BlockQuery) ([]*StoredBlock, error)

// VersionStore
CreateVersion(ctx context.Context, projectID, stream, label, description string) (*Version, error)
Diff(ctx context.Context, fromVersion, toVersion string) (*VersionDiff, error)

Ƃàçķéñđš​

Ţŵö ƃàçķéñđš îḿþļéḿéñţ ContentStore, ŵîţĥ đéŕéñţ ŕöļéš:

  • ÞöšţĝŕéŠǪĻ îš ţĥé šéŕṽéŕ'š öñļý ƃàçķéñđ. bowrain-server ŕéƒüšéš ţö šţàŕţ ŵîţĥöüţ à postgres:// đàţàƃàšé ÜŔĻ àñđ ƃüîļđš àļļ öƒ îţš šţöŕéš öñ ţĥàţ çöññéçţîöñ. Ţĥîš îš ţĥé šöüŕçé öƒ ţŕüţĥ ƒöŕ éṽéŕý ŵöŕķšþàçé.
  • ŠǪĻîţé (bowrain/store/sqlitestore) ƃàçķš ţĥé đéšķţöþ àþþ'š ļöçàļ ŵöŕķîñĝ çöþý: à çàçĥé ƒöŕ šþééđ àñđ öƒƒļîñé éđîţš ţĥàţ ḿîŕŕöŕš ţĥé šéŕṽéŕ àñđ îš ñéṽéŕ à šöüŕçé öƒ ţŕüţĥ.
import "github.com/neokapi/neokapi/bowrain/store/sqlitestore"

store, err := sqlitestore.NewSQLiteStore("working-copy.db")
if err != nil {
    log.Fatal(err)
}
defer store.Close()

Ƃöţĥ ƃàçķéñđš šĥàŕé öñé ļöĝîçàļ šçĥéḿà: þŕöĵéçţš, šţŕéàḿš, çöļļéçţîöñš, îţéḿš, ƃļöçķš, ṽéŕšîöñš, ţĥé çĥàñĝé ļöĝ, àñđ àššéţš.

Ƃļöçķ Îđéñţîţý​

Éṽéŕý šţöŕéđ ƃļöçķ ĝéţš à çöñţéñţ-àđđŕéššàƃļé îđéñţîţý çöḿþüţéđ ƒŕöḿ îţš šöüŕçé ţéẋţ:

identity := model.ComputeIdentity(block)
// identity.ContentHash = SHA-256 of normalized source text
// identity.ContextHash = SHA-256 of block name, type, and properties

Ţĥîš éñàƃļéš:

  • Đéđüþļîçàţîöñ: îđéñţîçàļ šöüŕçé ţéẋţ šĥàŕéš ţĥé šàḿé çöñţéñţ ĥàšĥ
  • Çĥàñĝé đéţéçţîöñ: ṽéŕšîöñ đš çöḿþàŕé çöñţéñţ ĥàšĥéš îñšţéàđ öƒ ƒüļļ ţéẋţ
  • Çàçĥé îñṽàļîđàţîöñ: ŕéšüļţš çàñ ƃé çàçĥéđ ƃý çöñţéñţ ĥàšĥ

Ṽéŕšîöñ Ţŕàçķîñĝ​

Ṽéŕšîöñš àŕé ñàḿéđ šñàþšĥöţš öƒ à þŕöĵéçţ'š ƃļöçķ šţàţé:

// Create a snapshot of a stream
v, err := store.CreateVersion(ctx, projectID, "main", "v1.0", "Initial release")

// List a stream's versions
versions, err := store.ListVersions(ctx, projectID, "main")

// Diff two versions
diff, err := store.Diff(ctx, v1.ID, v2.ID)
for _, change := range diff.Changes {
    fmt.Printf("%s: %s\n", change.BlockID, change.ChangeType)
}

Ƒļöŵ Îñţéĝŕàţîöñ​

Šéŕṽéŕ-šîđé ƒļöŵš ŕéàđ ƒŕöḿ àñđ ŵŕîţé ţö ţĥé çöñţéñţ šţöŕé ţĥŕöüĝĥ ţĥé ƒļöŵ šéŕṽîçé ŕàţĥéŕ ţĥàñ à ƒļöŵ-éẋéçüţöŕ öþţîöñ: à ŕüñ ļöàđš ţĥé þŕöĵéçţ'š ƃļöçķš ƒŕöḿ ţĥé šţöŕé, éẋéçüţéš ţĥé ƒļöŵ, àñđ šţöŕéš ţĥé þŕöđüçéđ ţàŕĝéţš ƃàçķ. Šéé Šéŕṽéŕ-šîđé ƒļöŵš.