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package cache
import (
"strings"
"github.com/MichaelMure/git-bug/bug"
"github.com/MichaelMure/git-bug/entity"
"github.com/MichaelMure/git-bug/query"
)
// resolver has the resolving functions needed by filters.
// This exist mainly to go through the functions of the cache with proper locking.
type resolver interface {
ResolveIdentityExcerpt(id entity.Id) (*IdentityExcerpt, error)
}
// Filter is a predicate that match a subset of bugs
type Filter func(excerpt *BugExcerpt, resolver resolver) bool
// StatusFilter return a Filter that match a bug status
func StatusFilter(status bug.Status) Filter {
return func(excerpt *BugExcerpt, resolver resolver) bool {
return excerpt.Status == status
}
}
// AuthorFilter return a Filter that match a bug author
func AuthorFilter(query string) Filter {
return func(excerpt *BugExcerpt, resolver resolver) bool {
query = strings.ToLower(query)
author, err := resolver.ResolveIdentityExcerpt(excerpt.AuthorId)
if err != nil {
panic(err)
}
return author.Match(query)
}
}
// MetadataFilter return a Filter that match a bug metadata at creation time
func MetadataFilter(pair query.StringPair) Filter {
return func(excerpt *BugExcerpt, resolver resolver) bool {
if value, ok := excerpt.CreateMetadata[pair.Key]; ok {
return value == pair.Value
}
return false
}
}
// LabelFilter return a Filter that match a label
func LabelFilter(label string) Filter {
return func(excerpt *BugExcerpt, resolver resolver) bool {
for _, l := range excerpt.Labels {
if string(l) == label {
return true
}
}
return false
}
}
// ActorFilter return a Filter that match a bug actor
func ActorFilter(query string) Filter {
return func(excerpt *BugExcerpt, resolver resolver) bool {
query = strings.ToLower(query)
for _, id := range excerpt.Actors {
identityExcerpt, err := resolver.ResolveIdentityExcerpt(id)
if err != nil {
panic(err)
}
if identityExcerpt.Match(query) {
return true
}
}
return false
}
}
// ParticipantFilter return a Filter that match a bug participant
func ParticipantFilter(query string) Filter {
return func(excerpt *BugExcerpt, resolver resolver) bool {
query = strings.ToLower(query)
for _, id := range excerpt.Participants {
identityExcerpt, err := resolver.ResolveIdentityExcerpt(id)
if err != nil {
panic(err)
}
if identityExcerpt.Match(query) {
return true
}
}
return false
}
}
// TitleFilter return a Filter that match if the title contains the given query
func TitleFilter(query string) Filter {
return func(excerpt *BugExcerpt, resolver resolver) bool {
return strings.Contains(
strings.ToLower(excerpt.Title),
strings.ToLower(query),
)
}
}
// NoLabelFilter return a Filter that match the absence of labels
func NoLabelFilter() Filter {
return func(excerpt *BugExcerpt, resolver resolver) bool {
return len(excerpt.Labels) == 0
}
}
// Matcher is a collection of Filter that implement a complex filter
type Matcher struct {
Status []Filter
Author []Filter
Metadata []Filter
Actor []Filter
Participant []Filter
Label []Filter
Title []Filter
NoFilters []Filter
}
// compileMatcher transform a query.Filters into a specialized matcher
// for the cache.
func compileMatcher(filters query.Filters) *Matcher {
result := &Matcher{}
for _, value := range filters.Status {
result.Status = append(result.Status, StatusFilter(value))
}
for _, value := range filters.Author {
result.Author = append(result.Author, AuthorFilter(value))
}
for _, value := range filters.Metadata {
result.Metadata = append(result.Metadata, MetadataFilter(value))
}
for _, value := range filters.Actor {
result.Actor = append(result.Actor, ActorFilter(value))
}
for _, value := range filters.Participant {
result.Participant = append(result.Participant, ParticipantFilter(value))
}
for _, value := range filters.Label {
result.Label = append(result.Label, LabelFilter(value))
}
for _, value := range filters.Title {
result.Title = append(result.Title, TitleFilter(value))
}
if filters.NoLabel {
result.NoFilters = append(result.NoFilters, NoLabelFilter())
}
return result
}
// Match check if a bug match the set of filters
func (f *Matcher) Match(excerpt *BugExcerpt, resolver resolver) bool {
if match := f.orMatch(f.Status, excerpt, resolver); !match {
return false
}
if match := f.orMatch(f.Author, excerpt, resolver); !match {
return false
}
if match := f.orMatch(f.Metadata, excerpt, resolver); !match {
return false
}
if match := f.orMatch(f.Participant, excerpt, resolver); !match {
return false
}
if match := f.orMatch(f.Actor, excerpt, resolver); !match {
return false
}
if match := f.andMatch(f.Label, excerpt, resolver); !match {
return false
}
if match := f.andMatch(f.NoFilters, excerpt, resolver); !match {
return false
}
if match := f.andMatch(f.Title, excerpt, resolver); !match {
return false
}
return true
}
// Check if any of the filters provided match the bug
func (*Matcher) orMatch(filters []Filter, excerpt *BugExcerpt, resolver resolver) bool {
if len(filters) == 0 {
return true
}
match := false
for _, f := range filters {
match = match || f(excerpt, resolver)
}
return match
}
// Check if all of the filters provided match the bug
func (*Matcher) andMatch(filters []Filter, excerpt *BugExcerpt, resolver resolver) bool {
if len(filters) == 0 {
return true
}
match := true
for _, f := range filters {
match = match && f(excerpt, resolver)
}
return match
}
|
