107 lines
1.9 KiB
Go
107 lines
1.9 KiB
Go
package model
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import (
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"encoding/json"
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"errors"
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)
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type SmartPlaylist struct {
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RuleGroup
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Order string `json:"order,omitempty"`
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Limit int `json:"limit,omitempty"`
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}
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type RuleGroup struct {
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Combinator string `json:"combinator"`
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Rules Rules `json:"rules"`
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}
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type Rules []IRule
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type IRule interface {
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Fields() []string
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}
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type Rule struct {
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Field string `json:"field"`
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Operator string `json:"operator"`
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Value interface{} `json:"value,omitempty"`
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}
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func (r Rule) Fields() []string {
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return []string{r.Field}
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}
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func (rg RuleGroup) Fields() []string {
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var result []string
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unique := map[string]struct{}{}
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for _, r := range rg.Rules {
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for _, f := range r.Fields() {
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if _, added := unique[f]; !added {
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result = append(result, f)
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unique[f] = struct{}{}
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}
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}
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}
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return result
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}
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func (rs *Rules) UnmarshalJSON(data []byte) error {
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var rawRules []json.RawMessage
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if err := json.Unmarshal(data, &rawRules); err != nil {
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return err
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}
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rules := make(Rules, len(rawRules))
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for i, rawRule := range rawRules {
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var r Rule
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if err := json.Unmarshal(rawRule, &r); err == nil && r.Field != "" {
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rules[i] = r
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continue
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}
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var g RuleGroup
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if err := json.Unmarshal(rawRule, &g); err == nil && g.Combinator != "" {
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rules[i] = g
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continue
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}
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return errors.New("Invalid json. Neither a Rule nor a RuleGroup: " + string(rawRule))
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}
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*rs = rules
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return nil
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}
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var SmartPlaylistFields = []string{
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"title",
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"album",
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"artist",
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"albumartist",
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"albumartwork",
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"tracknumber",
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"discnumber",
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"year",
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"size",
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"compilation",
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"dateadded",
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"datemodified",
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"discsubtitle",
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"comment",
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"lyrics",
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"sorttitle",
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"sortalbum",
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"sortartist",
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"sortalbumartist",
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"albumtype",
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"albumcomment",
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"catalognumber",
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"filepath",
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"filetype",
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"duration",
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"bitrate",
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"bpm",
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"channels",
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"genre",
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"loved",
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"lastplayed",
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"playcount",
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"rating",
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}
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