mirror of
https://github.com/gohugoio/hugo.git
synced 2024-07-02 15:20:28 +00:00
127 lines
3.1 KiB
Go
127 lines
3.1 KiB
Go
// Copyright © 2014 Steve Francia <spf@spf13.com>.
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//
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// Licensed under the Simple Public License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://opensource.org/licenses/Simple-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package hugolib
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import (
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"errors"
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"reflect"
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"sort"
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)
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type PageGroup struct {
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Key interface{}
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Data Pages
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}
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type mapKeyValues []reflect.Value
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func (v mapKeyValues) Len() int { return len(v) }
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func (v mapKeyValues) Swap(i, j int) { v[i], v[j] = v[j], v[i] }
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type mapKeyByInt struct{ mapKeyValues }
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func (s mapKeyByInt) Less(i, j int) bool { return s.mapKeyValues[i].Int() < s.mapKeyValues[j].Int() }
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type mapKeyByStr struct{ mapKeyValues }
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func (s mapKeyByStr) Less(i, j int) bool {
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return s.mapKeyValues[i].String() < s.mapKeyValues[j].String()
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}
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func sortKeys(v []reflect.Value, order string) []reflect.Value {
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if len(v) <= 1 {
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return v
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}
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switch v[0].Kind() {
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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if order == "desc" {
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sort.Sort(sort.Reverse(mapKeyByInt{v}))
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} else {
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sort.Sort(mapKeyByInt{v})
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}
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case reflect.String:
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if order == "desc" {
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sort.Sort(sort.Reverse(mapKeyByStr{v}))
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} else {
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sort.Sort(mapKeyByStr{v})
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}
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}
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return v
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}
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func (p Pages) GroupBy(key, order string) ([]PageGroup, error) {
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if len(p) < 1 {
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return nil, nil
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}
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if order != "asc" && order != "desc" {
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return nil, errors.New("order argument must be 'asc' or 'desc'")
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}
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ppt := reflect.TypeOf(&Page{})
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ft, ok := ppt.Elem().FieldByName(key)
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if !ok {
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return nil, errors.New("No such field in Page struct")
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}
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tmp := reflect.MakeMap(reflect.MapOf(ft.Type, reflect.SliceOf(ppt)))
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for _, e := range p {
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ppv := reflect.ValueOf(e)
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fv := ppv.Elem().FieldByName(key)
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if !tmp.MapIndex(fv).IsValid() {
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tmp.SetMapIndex(fv, reflect.MakeSlice(reflect.SliceOf(ppt), 0, 0))
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}
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tmp.SetMapIndex(fv, reflect.Append(tmp.MapIndex(fv), ppv))
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}
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var r []PageGroup
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for _, k := range sortKeys(tmp.MapKeys(), order) {
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r = append(r, PageGroup{Key: k.Interface(), Data: tmp.MapIndex(k).Interface().([]*Page)})
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}
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return r, nil
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}
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func (p Pages) GroupByDate(format, order string) ([]PageGroup, error) {
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if len(p) < 1 {
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return nil, nil
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}
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if order != "asc" && order != "desc" {
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return nil, errors.New("order argument must be 'asc' or 'desc'")
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}
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sp := p.ByDate()
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if order == "desc" {
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sp = sp.Reverse()
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}
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date := sp[0].Date.Format(format)
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var r []PageGroup
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r = append(r, PageGroup{Key: date, Data: make(Pages, 0)})
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r[0].Data = append(r[0].Data, sp[0])
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i := 0
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for _, e := range sp[1:] {
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date = e.Date.Format(format)
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if r[i].Key.(string) != date {
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r = append(r, PageGroup{Key: date})
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i++
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}
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r[i].Data = append(r[i].Data, e)
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}
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return r, nil
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}
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