Use db.Find instead of writing methods for every object (#28084)

For those simple objects, it's unnecessary to write the find and count
methods again and again.

routers/api/v1/user/key.go

@@ -8,6 +8,7 @@ import (
 	"net/http"
 
 	asymkey_model "code.gitea.io/gitea/models/asymkey"
+	"code.gitea.io/gitea/models/db"
 	"code.gitea.io/gitea/models/perm"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/context"
@@ -56,25 +57,26 @@ func listPublicKeys(ctx *context.APIContext, user *user_model.User) {
 	username := ctx.Params("username")
 
 	if fingerprint != "" {
+		var userID int64 // Unrestricted
 		// Querying not just listing
 		if username != "" {
 			// Restrict to provided uid
-			keys, err = asymkey_model.SearchPublicKey(ctx, user.ID, fingerprint)
-		} else {
-			// Unrestricted
-			keys, err = asymkey_model.SearchPublicKey(ctx, 0, fingerprint)
+			userID = user.ID
 		}
+		keys, err = db.Find[asymkey_model.PublicKey](ctx, asymkey_model.FindPublicKeyOptions{
+			OwnerID:     userID,
+			Fingerprint: fingerprint,
+		})
 		count = len(keys)
 	} else {
-		total, err2 := asymkey_model.CountPublicKeys(ctx, user.ID)
-		if err2 != nil {
-			ctx.InternalServerError(err)
-			return
-		}
-		count = int(total)
-
+		var total int64
 		// Use ListPublicKeys
-		keys, err = asymkey_model.ListPublicKeys(ctx, user.ID, utils.GetListOptions(ctx))
+		keys, total, err = db.FindAndCount[asymkey_model.PublicKey](ctx, asymkey_model.FindPublicKeyOptions{
+			ListOptions: utils.GetListOptions(ctx),
+			OwnerID:     user.ID,
+			NotKeytype:  asymkey_model.KeyTypePrincipal,
+		})
+		count = int(total)
 	}
 
 	if err != nil {