improve editor for KV

2026-04-26 15:28:50 +02:00
parent 22c98c2a4f
commit 98da535335
18 changed files with 2707 additions and 4 deletions
@@ -1,12 +1,14 @@
 package api

 import (
+	"encoding/json"
 	"net/http"
 	"net/url"
 	"strconv"
 	"strings"

 	"github.com/gorilla/mux"
+	"github.com/metazla/meta-core/internal/storage"
 )

 // KVInfoResponse is the response for GET /api/kv/info
@@ -184,3 +186,287 @@ func (s *Server) handleKVGetKey(w http.ResponseWriter, r *http.Request) {

 	writeJSON(w, http.StatusOK, response)
 }
+
+// KVTreeResponse is the response for GET /api/kv/tree
+type KVTreeResponse struct {
+	Prefix    string   `json:"prefix"`
+	Delimiter string   `json:"delimiter"`
+	Branches  []string `json:"branches"`
+	Leaves    []string `json:"leaves"`
+	Cursor    string   `json:"cursor"`
+	HasMore   bool     `json:"hasMore"`
+}
+
+// KVSearchResponse is the response for GET /api/kv/search
+type KVSearchResponse struct {
+	Contains  string   `json:"contains"`
+	Keys      []string `json:"keys"`
+	Truncated bool     `json:"truncated"`
+}
+
+// KVFindResponse is the response for GET /api/kv/find
+type KVFindResponse struct {
+	Contains  string             `json:"contains"`
+	Fields    []string           `json:"fields"`
+	Matches   []storage.FindMatch `json:"matches"`
+	Truncated bool               `json:"truncated"`
+}
+
+// KVValueResponse is the response for GET /api/kv/value
+type KVValueResponse struct {
+	Key    string `json:"key"`
+	Type   string `json:"type"`
+	Value  string `json:"value"`
+	Exists bool   `json:"exists"`
+}
+
+// KVValuePutRequest is the body for PUT /api/kv/value
+type KVValuePutRequest struct {
+	Key   string `json:"key"`
+	Value string `json:"value"`
+}
+
+// KVValueDeleteResponse is the response for DELETE /api/kv/value
+type KVValueDeleteResponse struct {
+	Key     string `json:"key"`
+	Deleted bool   `json:"deleted"`
+}
+
+// handleKVTree handles GET /api/kv/tree?prefix=&delimiter=/&cursor=0&max=500
+//
+// Lists the immediate children at prefix. When delimiter is set, keys with a
+// further delimiter are collapsed into branches. Pass the returned cursor back
+// to continue when hasMore is true.
+func (s *Server) handleKVTree(w http.ResponseWriter, r *http.Request) {
+	if !s.storage.IsConnected() {
+		writeError(w, http.StatusServiceUnavailable, "storage not connected")
+		return
+	}
+
+	q := r.URL.Query()
+	prefix := q.Get("prefix")
+	delimiter := q.Get("delimiter")
+	cursor := q.Get("cursor")
+
+	maxResults := 500
+	if v := q.Get("max"); v != "" {
+		if n, err := strconv.Atoi(v); err == nil && n > 0 {
+			maxResults = n
+		}
+	}
+
+	leaves, branches, nextCursor, err := s.storage.ScanKeys(prefix, delimiter, cursor, maxResults)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	writeJSON(w, http.StatusOK, KVTreeResponse{
+		Prefix:    prefix,
+		Delimiter: delimiter,
+		Branches:  branches,
+		Leaves:    leaves,
+		Cursor:    nextCursor,
+		HasMore:   nextCursor != "0",
+	})
+}
+
+// handleKVFind handles GET /api/kv/find?contains=&fields=a,b,c&limit=200
+//
+// Value-search: scans every key whose path ends with /<field> for each
+// configured field, then returns those whose value contains the substring
+// (case-insensitive). Used as the editor's "filter the view" action.
+func (s *Server) handleKVFind(w http.ResponseWriter, r *http.Request) {
+	if !s.storage.IsConnected() {
+		writeError(w, http.StatusServiceUnavailable, "storage not connected")
+		return
+	}
+
+	q := r.URL.Query()
+	contains := q.Get("contains")
+	if contains == "" {
+		writeError(w, http.StatusBadRequest, "contains is required")
+		return
+	}
+	fieldsParam := q.Get("fields")
+	if fieldsParam == "" {
+		writeError(w, http.StatusBadRequest, "fields is required (comma-separated)")
+		return
+	}
+	fields := strings.Split(fieldsParam, ",")
+	for i := range fields {
+		fields[i] = strings.TrimSpace(fields[i])
+	}
+
+	limit := 200
+	if v := q.Get("limit"); v != "" {
+		if n, err := strconv.Atoi(v); err == nil && n > 0 {
+			limit = n
+		}
+	}
+
+	matches, truncated, err := s.storage.FindByValue(contains, fields, limit)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+	if matches == nil {
+		matches = []storage.FindMatch{}
+	}
+
+	writeJSON(w, http.StatusOK, KVFindResponse{
+		Contains:  contains,
+		Fields:    fields,
+		Matches:   matches,
+		Truncated: truncated,
+	})
+}
+
+// handleKVSearch handles GET /api/kv/search?contains=&limit=500
+func (s *Server) handleKVSearch(w http.ResponseWriter, r *http.Request) {
+	if !s.storage.IsConnected() {
+		writeError(w, http.StatusServiceUnavailable, "storage not connected")
+		return
+	}
+
+	q := r.URL.Query()
+	contains := q.Get("contains")
+	if contains == "" {
+		writeError(w, http.StatusBadRequest, "contains is required")
+		return
+	}
+
+	limit := 500
+	if v := q.Get("limit"); v != "" {
+		if n, err := strconv.Atoi(v); err == nil && n > 0 {
+			limit = n
+		}
+	}
+
+	keys, truncated, err := s.storage.SearchKeys(contains, limit)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	writeJSON(w, http.StatusOK, KVSearchResponse{
+		Contains:  contains,
+		Keys:      keys,
+		Truncated: truncated,
+	})
+}
+
+// handleKVValueGet handles GET /api/kv/value?key=...
+func (s *Server) handleKVValueGet(w http.ResponseWriter, r *http.Request) {
+	if !s.storage.IsConnected() {
+		writeError(w, http.StatusServiceUnavailable, "storage not connected")
+		return
+	}
+
+	key := r.URL.Query().Get("key")
+	if key == "" {
+		writeError(w, http.StatusBadRequest, "key is required")
+		return
+	}
+
+	kind, value, exists, err := s.storage.GetKeyInfo(key)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	writeJSON(w, http.StatusOK, KVValueResponse{
+		Key:    key,
+		Type:   kind,
+		Value:  value,
+		Exists: exists,
+	})
+}
+
+// handleKVValuePut handles PUT /api/kv/value with body {key, value}.
+// Maintains the file index when the key matches file:<hashId>/...
+func (s *Server) handleKVValuePut(w http.ResponseWriter, r *http.Request) {
+	if !s.storage.IsConnected() {
+		writeError(w, http.StatusServiceUnavailable, "storage not connected")
+		return
+	}
+
+	var req KVValuePutRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid JSON body")
+		return
+	}
+	if req.Key == "" {
+		writeError(w, http.StatusBadRequest, "key is required")
+		return
+	}
+
+	if err := s.storage.SetRawValue(req.Key, req.Value); err != nil {
+		writeError(w, http.StatusConflict, err.Error())
+		return
+	}
+
+	if hashID := extractFileHashID(req.Key); hashID != "" {
+		if err := s.storage.IndexAdd(hashID); err != nil {
+			// Non-fatal: the value was written; index entry is best-effort.
+			// Surface in the log path of writeJSON via response header.
+			w.Header().Set("X-KV-Index-Warning", err.Error())
+		}
+	}
+
+	writeJSON(w, http.StatusOK, KVValueResponse{
+		Key:    req.Key,
+		Type:   "string",
+		Value:  req.Value,
+		Exists: true,
+	})
+}
+
+// handleKVValueDelete handles DELETE /api/kv/value?key=...
+// When the key matches file:<hashId>/..., removes the file index entry if no
+// sibling keys remain after the delete.
+func (s *Server) handleKVValueDelete(w http.ResponseWriter, r *http.Request) {
+	if !s.storage.IsConnected() {
+		writeError(w, http.StatusServiceUnavailable, "storage not connected")
+		return
+	}
+
+	key := r.URL.Query().Get("key")
+	if key == "" {
+		writeError(w, http.StatusBadRequest, "key is required")
+		return
+	}
+
+	deleted, err := s.storage.DeleteRawKey(key)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	if deleted {
+		if hashID := extractFileHashID(key); hashID != "" {
+			if _, err := s.storage.IndexRemoveIfEmpty(hashID); err != nil {
+				w.Header().Set("X-KV-Index-Warning", err.Error())
+			}
+		}
+	}
+
+	writeJSON(w, http.StatusOK, KVValueDeleteResponse{
+		Key:     key,
+		Deleted: deleted,
+	})
+}
+
+// extractFileHashID returns the hashID for a key shaped like file:<hashId>/...
+// Returns "" when the key does not follow that convention.
+func extractFileHashID(key string) string {
+	if !strings.HasPrefix(key, "file:") {
+		return ""
+	}
+	rest := strings.TrimPrefix(key, "file:")
+	slash := strings.Index(rest, "/")
+	if slash <= 0 {
+		return ""
+	}
+	return rest[:slash]
+}