3e1f3e6a1b
- Searchable, Engine, Gate and an init-time engine registry with the null engine - GORM callbacks installed through lagoon.OnDatabase register an after-commit sync that reloads the row and upserts or deletes its document - Gates run before any request: engine configured, database published, app Gate - hand-rolled net/http Typesense engine following the Scout wire contract - module README and root modules row
92 lines
3.3 KiB
Go
92 lines
3.3 KiB
Go
package beachcomber
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import (
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"context"
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"gorm.io/gorm"
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)
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// Searchable is implemented (on the pointer receiver or the value) by a
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// model whose rows are kept in a search index. The GORM callbacks sync a
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// Searchable model after every create, update and delete.
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type Searchable interface {
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// SearchableAs is the index name without the search.prefix.
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SearchableAs() string
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// ToSearchableArray builds the document of the row. It runs after the
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// write committed, on a fresh copy reloaded by primary key, and may
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// query related rows through db. An error means nothing is indexed.
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ToSearchableArray(ctx context.Context, db *gorm.DB) (map[string]any, error)
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// ShouldBeSearchable reports whether the row belongs in the index. A
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// row that should not be searchable has its document removed.
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ShouldBeSearchable() bool
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}
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// IndexSchemaProvider supplies the schema an engine creates the index with
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// when the index does not exist yet. For Typesense it is the collection
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// schema (fields, default_sorting_field); the engine adds the name.
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type IndexSchemaProvider interface {
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SearchIndexSchema() map[string]any
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}
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// SearchKeyer replaces the document key, which defaults to the decimal
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// primary key. It is called on the written model, which may hold only its
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// primary key, so it must derive the key from the primary key.
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type SearchKeyer interface {
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SearchKey() string
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}
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// Engine is a search index driver.
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type Engine interface {
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// Name is the search.driver value that selects the engine.
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Name() string
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// Configured reports whether the engine may send anything. When it is
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// false, sync is skipped without a request.
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Configured() bool
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// Upsert inserts or replaces docs in index, creating the index from
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// schema first when it does not exist.
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Upsert(ctx context.Context, index string, schema map[string]any, docs []map[string]any) error
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// Delete removes the documents with ids from index. A document that
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// is already gone is not an error.
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Delete(ctx context.Context, index string, ids []string) error
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// Flush drops the whole index. A missing index is not an error.
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Flush(ctx context.Context, index string) error
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// SearchIDs returns the ids of the documents matching q, in the
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// engine's order. They are candidates only: callers must re-check
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// every id against the database before exposing it.
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SearchIDs(ctx context.Context, index string, q Query) ([]string, error)
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}
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// Query is an engine search request.
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type Query struct {
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// Q is the query text; empty means match everything ("*").
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Q string
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// QueryBy lists the fields Q is matched against.
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QueryBy []string
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// FilterBy is an engine filter expression, for example
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// "collection_id:=5".
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FilterBy string
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// SortBy is an engine sort expression, for example "created_at:desc".
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SortBy string
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// Page is 1-based; 0 leaves the engine default.
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Page int
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// PerPage is the page size; 0 leaves the engine default.
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PerPage int
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}
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// Gate is the application kill-switch consulted before every sync. It
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// reads its setting through db; any error must count as off.
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type Gate interface {
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Enabled(ctx context.Context, db *gorm.DB) bool
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}
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// GateFunc adapts a function to Gate.
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type GateFunc func(ctx context.Context, db *gorm.DB) bool
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// Enabled calls f.
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func (f GateFunc) Enabled(ctx context.Context, db *gorm.DB) bool {
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if f == nil {
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return false
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}
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return f(ctx, db)
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}
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