feat: return time of last usage for public keys and access tokens in the api (#34323)

In the Gitea GUI, the user can see the time that _AccessTokens_ and
_PublicKeys_ were last used. This information is not returned by the
_/users/{username}/tokens_ and _/user/keys_ endpoints in the API. This
PR adds the missing data.

The time of last usage for for _tokens_ & _keys_ seem to be stored in
the _Updated_ field of the structs internally. For consistency, I have
used the name _updated_at_ for the new field returned by the _API_.
However, for the _API_ user, I don't think that name reflects the data
returned, as I believe it is the time of last usage. I propose that we
use the name _last_used_at_ instead. Let's hear reviewers opinion on
that.

* PublicKey
  1. _last_used_at_: string($date-time)
* AccessToken
  1. _created_at_: string($date-time) (for parity with public keys)
  2. _last_used_at_: string($date-time)

Fix #34313

Author: tobiasbp

modules/structs/user_app.go

@@ -11,11 +11,13 @@ import (
 // AccessToken represents an API access token.
 // swagger:response AccessToken
 type AccessToken struct {
-	ID             int64    `json:"id"`
-	Name           string   `json:"name"`
-	Token          string   `json:"sha1"`
-	TokenLastEight string   `json:"token_last_eight"`
-	Scopes         []string `json:"scopes"`
+	ID             int64     `json:"id"`
+	Name           string    `json:"name"`
+	Token          string    `json:"sha1"`
+	TokenLastEight string    `json:"token_last_eight"`
+	Scopes         []string  `json:"scopes"`
+	Created        time.Time `json:"created_at"`
+	Updated        time.Time `json:"last_used_at"`
 }
 
 // AccessTokenList represents a list of API access token.

modules/structs/user_key.go

@@ -16,6 +16,7 @@ type PublicKey struct {
 	Fingerprint string `json:"fingerprint,omitempty"`
 	// swagger:strfmt date-time
 	Created  time.Time `json:"created_at,omitempty"`
+	Updated  time.Time `json:"last_used_at,omitempty"`
 	Owner    *User     `json:"user,omitempty"`
 	ReadOnly bool      `json:"read_only,omitempty"`
 	KeyType  string    `json:"key_type,omitempty"`

routers/api/v1/user/app.go

@@ -62,6 +62,8 @@ func ListAccessTokens(ctx *context.APIContext) {
 			Name:           tokens[i].Name,
 			TokenLastEight: tokens[i].TokenLastEight,
 			Scopes:         tokens[i].Scope.StringSlice(),
+			Created:        tokens[i].CreatedUnix.AsTime(),
+			Updated:        tokens[i].UpdatedUnix.AsTime(),
 		}
 	}
 

services/convert/convert.go

@@ -316,6 +316,7 @@ func ToPublicKey(apiLink string, key *asymkey_model.PublicKey) *api.PublicKey {
 		Title:       key.Name,
 		Fingerprint: key.Fingerprint,
 		Created:     key.CreatedUnix.AsTime(),
+		Updated:     key.UpdatedUnix.AsTime(),
 	}
 }