1 files changed, 105 insertions, 0 deletions
diff --git a/identity/version.go b/identity/version.go
new file mode 100644
index 00000000..f76ec4c5
--- /dev/null
+++ b/identity/version.go
@@ -0,0 +1,105 @@
+package identity
+
+import (
+	"crypto/rand"
+	"encoding/json"
+	"fmt"
+	"strings"
+
+	"github.com/MichaelMure/git-bug/repository"
+	"github.com/MichaelMure/git-bug/util/git"
+
+	"github.com/MichaelMure/git-bug/util/lamport"
+	"github.com/MichaelMure/git-bug/util/text"
+)
+
+type Version struct {
+	// Private field so not serialized
+	commitHash git.Hash
+
+	// The lamport time at which this version become effective
+	// The reference time is the bug edition lamport clock
+	Time lamport.Time `json:"time"`
+
+	Name      string `json:"name"`
+	Email     string `json:"email"`
+	Login     string `json:"login"`
+	AvatarUrl string `json:"avatar_url"`
+
+	// The set of keys valid at that time, from this version onward, until they get removed
+	// in a new version. This allow to have multiple key for the same identity (e.g. one per
+	// device) as well as revoke key.
+	Keys []Key `json:"pub_keys"`
+
+	// This optional array is here to ensure a better randomness of the identity id to avoid collisions.
+	// It has no functional purpose and should be ignored.
+	// It is advised to fill this array if there is not enough entropy, e.g. if there is no keys.
+	Nonce []byte `json:"nonce,omitempty"`
+}
+
+func (v *Version) Validate() error {
+	if text.Empty(v.Name) && text.Empty(v.Login) {
+		return fmt.Errorf("either name or login should be set")
+	}
+
+	if strings.Contains(v.Name, "\n") {
+		return fmt.Errorf("name should be a single line")
+	}
+
+	if !text.Safe(v.Name) {
+		return fmt.Errorf("name is not fully printable")
+	}
+
+	if strings.Contains(v.Login, "\n") {
+		return fmt.Errorf("login should be a single line")
+	}
+
+	if !text.Safe(v.Login) {
+		return fmt.Errorf("login is not fully printable")
+	}
+
+	if strings.Contains(v.Email, "\n") {
+		return fmt.Errorf("email should be a single line")
+	}
+
+	if !text.Safe(v.Email) {
+		return fmt.Errorf("email is not fully printable")
+	}
+
+	if v.AvatarUrl != "" && !text.ValidUrl(v.AvatarUrl) {
+		return fmt.Errorf("avatarUrl is not a valid URL")
+	}
+
+	if len(v.Nonce) > 64 {
+		return fmt.Errorf("nonce is too big")
+	}
+
+	return nil
+}
+
+// Write will serialize and store the Version as a git blob and return
+// its hash
+func (v *Version) Write(repo repository.Repo) (git.Hash, error) {
+	data, err := json.Marshal(v)
+
+	if err != nil {
+		return "", err
+	}
+
+	hash, err := repo.StoreData(data)
+
+	if err != nil {
+		return "", err
+	}
+
+	return hash, nil
+}
+
+func makeNonce(len int) []byte {
+	result := make([]byte, len)
+	_, err := rand.Read(result)
+	if err != nil {
+		panic(err)
+	}
+	return result
+}