logs-analyzer/signoz/pkg/query-service/queryBuilderToExpr/queryBuilderToExpr.go

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2024-09-02 22:47:30 +03:00
package queryBuilderToExpr
import (
"fmt"
"reflect"
"strings"
expr "github.com/antonmedv/expr"
v3 "go.signoz.io/signoz/pkg/query-service/model/v3"
"go.uber.org/zap"
)
var logOperatorsToExpr = map[v3.FilterOperator]string{
v3.FilterOperatorEqual: "==",
v3.FilterOperatorNotEqual: "!=",
v3.FilterOperatorLessThan: "<",
v3.FilterOperatorLessThanOrEq: "<=",
v3.FilterOperatorGreaterThan: ">",
v3.FilterOperatorGreaterThanOrEq: ">=",
v3.FilterOperatorContains: "contains",
v3.FilterOperatorNotContains: "not contains",
v3.FilterOperatorRegex: "matches",
v3.FilterOperatorNotRegex: "not matches",
v3.FilterOperatorIn: "in",
v3.FilterOperatorNotIn: "not in",
v3.FilterOperatorExists: "in",
v3.FilterOperatorNotExists: "not in",
// we dont support like and nlike as of now.
}
func getName(v v3.AttributeKey) string {
if v.Type == v3.AttributeKeyTypeTag {
return fmt.Sprintf(`attributes["%s"]`, v.Key)
} else if v.Type == v3.AttributeKeyTypeResource {
return fmt.Sprintf(`resource["%s"]`, v.Key)
}
return v.Key
}
func getTypeName(v v3.AttributeKeyType) string {
if v == v3.AttributeKeyTypeTag {
return "attributes"
} else if v == v3.AttributeKeyTypeResource {
return "resource"
}
return ""
}
func Parse(filters *v3.FilterSet) (string, error) {
var res []string
for _, v := range filters.Items {
if _, ok := logOperatorsToExpr[v.Operator]; !ok {
return "", fmt.Errorf("operator not supported")
}
name := getName(v.Key)
var filter string
switch v.Operator {
// uncomment following lines when new version of expr is used
// case v3.FilterOperatorIn, v3.FilterOperatorNotIn:
// filter = fmt.Sprintf("%s %s list%s", name, logOperatorsToExpr[v.Operator], exprFormattedValue(v.Value))
case v3.FilterOperatorExists, v3.FilterOperatorNotExists:
filter = fmt.Sprintf("%s %s %s", exprFormattedValue(v.Key.Key), logOperatorsToExpr[v.Operator], getTypeName(v.Key.Type))
default:
filter = fmt.Sprintf("%s %s %s", name, logOperatorsToExpr[v.Operator], exprFormattedValue(v.Value))
if v.Operator == v3.FilterOperatorContains || v.Operator == v3.FilterOperatorNotContains {
// `contains` and `ncontains` should be case insensitive to match how they work when querying logs.
filter = fmt.Sprintf(
"lower(%s) %s lower(%s)",
name, logOperatorsToExpr[v.Operator], exprFormattedValue(v.Value),
)
}
// Avoid running operators on nil values
if v.Operator != v3.FilterOperatorEqual && v.Operator != v3.FilterOperatorNotEqual {
filter = fmt.Sprintf("%s != nil && %s", name, filter)
}
}
// check if the filter is a correct expression language
_, err := expr.Compile(filter)
if err != nil {
return "", err
}
res = append(res, filter)
}
// check the final filter
q := strings.Join(res, " "+strings.ToLower(filters.Operator)+" ")
_, err := expr.Compile(q)
if err != nil {
return "", err
}
return q, nil
}
func exprFormattedValue(v interface{}) string {
switch x := v.(type) {
case uint8, uint16, uint32, uint64, int, int8, int16, int32, int64:
return fmt.Sprintf("%d", x)
case float32, float64:
return fmt.Sprintf("%f", x)
case string:
return fmt.Sprintf("\"%s\"", quoteEscapedString(x))
case bool:
return fmt.Sprintf("%v", x)
case []interface{}:
if len(x) == 0 {
return ""
}
switch x[0].(type) {
case string:
str := "["
for idx, sVal := range x {
str += fmt.Sprintf("'%s'", quoteEscapedString(sVal.(string)))
if idx != len(x)-1 {
str += ","
}
}
str += "]"
return str
case uint8, uint16, uint32, uint64, int, int8, int16, int32, int64, float32, float64, bool:
return strings.Join(strings.Fields(fmt.Sprint(x)), ",")
default:
zap.L().Error("invalid type for formatted value", zap.Any("type", reflect.TypeOf(x[0])))
return ""
}
default:
zap.L().Error("invalid type for formatted value", zap.Any("type", reflect.TypeOf(x)))
return ""
}
}
func quoteEscapedString(str string) string {
str = strings.ReplaceAll(str, `\`, `\\`)
str = strings.ReplaceAll(str, `"`, `\"`)
return str
}