WeKnora deployment source with the reviewed wiki identity, summary and recovery fixes

internal/handler/list_pagination.go

@@ -0,0 +1,68 @@
+package handler
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+
+	apperrors "github.com/Tencent/WeKnora/internal/errors"
+)
+
+const (
+	defaultListPageSize = 20
+	maxListPageSize     = 100
+	defaultSearchLimit  = 20
+	maxSearchLimit      = 100
+)
+
+// parseListPagination parses ?page and ?page_size for tenant-scoped list
+// endpoints. Omitted keys default to page=1 and page_size=20. A present but
+// malformed or out-of-range value yields a validation error on the context.
+func parseListPagination(c *gin.Context) (page, pageSize int, ok bool) {
+	page = 1
+	pageSize = defaultListPageSize
+
+	if s := strings.TrimSpace(c.Query("page")); s != "" {
+		p, err := strconv.Atoi(s)
+		if err != nil || p < 1 {
+			c.Error(apperrors.NewValidationError("page must be a positive integer"))
+			return 0, 0, false
+		}
+		page = p
+	}
+	if s := strings.TrimSpace(c.Query("page_size")); s != "" {
+		ps, err := strconv.Atoi(s)
+		if err != nil || ps < 1 || ps > maxListPageSize {
+			c.Error(apperrors.NewValidationError(fmt.Sprintf("page_size must be between 1 and %d", maxListPageSize)))
+			return 0, 0, false
+		}
+		pageSize = ps
+	}
+	return page, pageSize, true
+}
+
+// parseOffsetPagination parses ?offset and ?limit for offset-based search
+// endpoints. Omitted keys default to offset=0 and limit=20.
+func parseOffsetPagination(c *gin.Context) (offset, limit int, ok bool) {
+	limit = defaultSearchLimit
+
+	if s := strings.TrimSpace(c.Query("offset")); s != "" {
+		parsedOffset, err := strconv.Atoi(s)
+		if err != nil || parsedOffset < 0 {
+			c.Error(apperrors.NewValidationError("offset must be a non-negative integer"))
+			return 0, 0, false
+		}
+		offset = parsedOffset
+	}
+	if s := strings.TrimSpace(c.Query("limit")); s != "" {
+		parsedLimit, err := strconv.Atoi(s)
+		if err != nil || parsedLimit < 1 || parsedLimit > maxSearchLimit {
+			c.Error(apperrors.NewValidationError(fmt.Sprintf("limit must be between 1 and %d", maxSearchLimit)))
+			return 0, 0, false
+		}
+		limit = parsedLimit
+	}
+	return offset, limit, true
+}