/
sort.go
116 lines (112 loc) · 2.99 KB
/
sort.go
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// Copyright 2023 Pouya Vedadiyan
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package genql
import (
"fmt"
"sort"
)
func Sort(slice []any, orderBy OrderByDefinition) (err error) {
defer func() {
if r := recover(); r != nil {
err = r.(error)
}
}()
if len(orderBy) == 0 {
return nil
}
sort.Slice(slice, func(i, j int) bool {
rs, err := Compare(slice, i, j, orderBy)
if err != nil {
panic(err)
}
return rs
})
return nil
}
func Compare(slice []any, i int, j int, orderBy OrderByDefinition) (bool, error) {
if len(orderBy) == 0 {
return false, nil
}
key := orderBy[0].Key
direction := orderBy[0].Value
first, err := ExecReader(slice[i], key)
if err != nil {
return false, err
}
if first == nil {
return false, nil
}
second, err := ExecReader(slice[j], key)
if err != nil {
return false, err
}
if second == nil {
return true, nil
}
switch first.(type) {
case float64:
{
firstValue, ok := first.(float64)
if !ok {
return false, INVALID_TYPE.Extend(fmt.Sprintf("failed to compare values. expected number but found %T", first))
}
secondValue, ok := second.(float64)
if !ok {
return false, INVALID_TYPE.Extend(fmt.Sprintf("failed to compare values. expected number but found %T", first))
}
if firstValue == secondValue {
return Compare(slice, i, j, orderBy[1:])
}
return firstValue > secondValue != direction, nil
}
case string:
{
firstValue, ok := first.(string)
if !ok {
return false, INVALID_TYPE.Extend(fmt.Sprintf("failed to compare values. expected string but found %T", first))
}
secondValue, ok := second.(string)
if !ok {
return false, INVALID_TYPE.Extend(fmt.Sprintf("failed to compare values. expected string but found %T", first))
}
if firstValue == secondValue {
return Compare(slice, i, j, orderBy[1:])
}
return firstValue > secondValue != direction, nil
}
case bool:
{
firstValueRaw, ok := first.(bool)
if !ok {
return false, INVALID_TYPE.Extend(fmt.Sprintf("failed to compare values. expected boolean but found %T", first))
}
secondValueRaw, ok := second.(bool)
if !ok {
return false, INVALID_TYPE.Extend(fmt.Sprintf("failed to compare values. expected boolean but found %T", first))
}
if first == second {
return Compare(slice, i, j, orderBy[1:])
}
firstValue := 0
secondValue := 0
if firstValueRaw {
firstValue = 1
}
if secondValueRaw {
secondValue = 1
}
return firstValue > secondValue != direction, nil
}
}
return false, nil
}