1 files changed, 70 insertions, 0 deletions
diff --git a/cache/identity_excerpt.go b/cache/identity_excerpt.go
new file mode 100644
index 00000000..2a13bc60
--- /dev/null
+++ b/cache/identity_excerpt.go
@@ -0,0 +1,70 @@
+package cache
+
+import (
+	"encoding/gob"
+	"fmt"
+
+	"github.com/MichaelMure/git-bug/identity"
+)
+
+// Package initialisation used to register the type for (de)serialization
+func init() {
+	gob.Register(IdentityExcerpt{})
+}
+
+// IdentityExcerpt hold a subset of the identity values to be able to sort and
+// filter identities efficiently without having to read and compile each raw
+// identity.
+type IdentityExcerpt struct {
+	Id string
+
+	Name              string
+	Login             string
+	ImmutableMetadata map[string]string
+}
+
+func NewIdentityExcerpt(i *identity.Identity) *IdentityExcerpt {
+	return &IdentityExcerpt{
+		Id:                i.Id(),
+		Name:              i.Name(),
+		Login:             i.Login(),
+		ImmutableMetadata: i.ImmutableMetadata(),
+	}
+}
+
+func (i *IdentityExcerpt) HumanId() string {
+	return identity.FormatHumanID(i.Id)
+}
+
+// DisplayName return a non-empty string to display, representing the
+// identity, based on the non-empty values.
+func (i *IdentityExcerpt) DisplayName() string {
+	switch {
+	case i.Name == "" && i.Login != "":
+		return i.Login
+	case i.Name != "" && i.Login == "":
+		return i.Name
+	case i.Name != "" && i.Login != "":
+		return fmt.Sprintf("%s (%s)", i.Name, i.Login)
+	}
+
+	panic("invalid person data")
+}
+
+/*
+ * Sorting
+ */
+
+type IdentityById []*IdentityExcerpt
+
+func (b IdentityById) Len() int {
+	return len(b)
+}
+
+func (b IdentityById) Less(i, j int) bool {
+	return b[i].Id < b[j].Id
+}
+
+func (b IdentityById) Swap(i, j int) {
+	b[i], b[j] = b[j], b[i]
+}