feat: build index & search with bleve (close #1740 pr #2386)

* feat: build index & search with bleve (#1740)

* delete unused struct

Co-authored-by: Noah Hsu <i@nn.ci>

server/handles/index.go

@@ -0,0 +1,54 @@
+package handles
+
+import (
+	"context"
+	"strconv"
+
+	"github.com/alist-org/alist/v3/internal/db"
+	"github.com/alist-org/alist/v3/internal/index"
+	"github.com/alist-org/alist/v3/server/common"
+	"github.com/gin-gonic/gin"
+)
+
+func BuildIndex(c *gin.Context) {
+	go func() {
+		// TODO: consider run build index as non-admin
+		user, _ := db.GetAdmin()
+		ctx := context.WithValue(c.Request.Context(), "user", user)
+		maxDepth, err := strconv.Atoi(c.PostForm("max_depth"))
+		if err != nil {
+			maxDepth = -1
+		}
+		indexPaths := []string{"/"}
+		ignorePaths := c.PostFormArray("ignore_paths")
+		index.BuildIndex(ctx, indexPaths, ignorePaths, maxDepth)
+	}()
+	common.SuccessResp(c)
+}
+
+func GetProgress(c *gin.Context) {
+	progress := index.ReadProgress()
+	common.SuccessResp(c, progress)
+}
+
+func Search(c *gin.Context) {
+	results := []string{}
+	query, exists := c.GetQuery("query")
+	if !exists {
+		common.SuccessResp(c, results)
+	}
+	sizeStr, _ := c.GetQuery("size")
+	size, err := strconv.Atoi(sizeStr)
+	if err != nil {
+		size = 10
+	}
+	searchResults, err := index.Search(query, size)
+	if err != nil {
+		common.ErrorResp(c, err, 500)
+		return
+	}
+	for _, documentMatch := range searchResults.Hits {
+		results = append(results, documentMatch.Fields["Path"].(string))
+	}
+	common.SuccessResp(c, results)
+}

server/router.go

@@ -107,6 +107,11 @@ func admin(g *gin.RouterGroup) {
 	ms := g.Group("/message")
 	ms.POST("/get", message.HttpInstance.GetHandle)
 	ms.POST("/send", message.HttpInstance.SendHandle)
+
+	index := g.Group("/index")
+	index.POST("/build", handles.BuildIndex)
+	index.GET("/progress", handles.GetProgress)
+	index.GET("/search", handles.Search)
 }
 
 func _fs(g *gin.RouterGroup) {