feat(stores): Vector store backend (#1795)

Add simple vector store backend

Signed-off-by: Richard Palethorpe <io@richiejp.com>

core/http/endpoints/localai/stores.go

@@ -0,0 +1,121 @@
+package localai
+
+import (
+	"github.com/go-skynet/LocalAI/core/backend"
+	"github.com/go-skynet/LocalAI/core/config"
+	"github.com/go-skynet/LocalAI/core/schema"
+	"github.com/go-skynet/LocalAI/pkg/model"
+	"github.com/go-skynet/LocalAI/pkg/store"
+	"github.com/gofiber/fiber/v2"
+)
+
+func StoresSetEndpoint(sl *model.ModelLoader, appConfig *config.ApplicationConfig) func(c *fiber.Ctx) error {
+	return func(c *fiber.Ctx) error {
+		input := new(schema.StoresSet)
+
+		if err := c.BodyParser(input); err != nil {
+			return err
+		}
+
+		sb, err := backend.StoreBackend(sl, appConfig, input.Store)
+		if err != nil {
+			return err
+		}
+
+		vals := make([][]byte, len(input.Values))
+		for i, v := range input.Values {
+			vals[i] = []byte(v)
+		}
+
+		err = store.SetCols(c.Context(), sb, input.Keys, vals)
+		if err != nil {
+			return err
+		}
+
+		return c.Send(nil)
+	}
+}
+
+func StoresDeleteEndpoint(sl *model.ModelLoader, appConfig *config.ApplicationConfig) func(c *fiber.Ctx) error {
+	return func(c *fiber.Ctx) error {
+		input := new(schema.StoresDelete)
+
+		if err := c.BodyParser(input); err != nil {
+			return err
+		}
+
+		sb, err := backend.StoreBackend(sl, appConfig, input.Store)
+		if err != nil {
+			return err
+		}
+
+		if err := store.DeleteCols(c.Context(), sb, input.Keys); err != nil {
+			return err
+		}
+
+		return c.Send(nil)
+	}
+}
+
+func StoresGetEndpoint(sl *model.ModelLoader, appConfig *config.ApplicationConfig) func(c *fiber.Ctx) error {
+	return func(c *fiber.Ctx) error {
+		input := new(schema.StoresGet)
+
+		if err := c.BodyParser(input); err != nil {
+			return err
+		}
+
+		sb, err := backend.StoreBackend(sl, appConfig, input.Store)
+		if err != nil {
+			return err
+		}
+
+		keys, vals, err := store.GetCols(c.Context(), sb, input.Keys)
+		if err != nil {
+			return err
+		}
+
+		res := schema.StoresGetResponse{
+			Keys:   keys,
+			Values: make([]string, len(vals)),
+		}
+
+		for i, v := range vals {
+			res.Values[i] = string(v)
+		}
+
+		return c.JSON(res)
+	}
+}
+
+func StoresFindEndpoint(sl *model.ModelLoader, appConfig *config.ApplicationConfig) func(c *fiber.Ctx) error {
+	return func(c *fiber.Ctx) error {
+		input := new(schema.StoresFind)
+
+		if err := c.BodyParser(input); err != nil {
+			return err
+		}
+
+		sb, err := backend.StoreBackend(sl, appConfig, input.Store)
+		if err != nil {
+			return err
+		}
+
+		keys, vals, similarities, err := store.Find(c.Context(), sb, input.Key, input.Topk)
+		if err != nil {
+			return err
+		}
+
+		res := schema.StoresFindResponse{
+			Keys:         keys,
+			Values:       make([]string, len(vals)),
+			Similarities: similarities,
+		}
+
+		for i, v := range vals {
+			res.Values[i] = string(v)
+		}
+
+		return c.JSON(res)
+	}
+}