fix: rename iam to instance (#3345)

* fix: rename iam command side to instance

* fix: rename iam command side to instance

* fix: rename iam command side to instance

* fix: rename iam command side to instance

* fix: rename orgiampolicy to domain policy

* fix: merge conflicts

* fix: protos

* fix: md files

* implement deprecated org iam policy again

Co-authored-by: Livio Amstutz <livio.a@gmail.com>

internal/command/instance_policy_mail_template.go

@@ -0,0 +1,95 @@
+package command
+
+import (
+	"context"
+
+	"github.com/caos/zitadel/internal/domain"
+	caos_errs "github.com/caos/zitadel/internal/errors"
+	"github.com/caos/zitadel/internal/eventstore"
+	"github.com/caos/zitadel/internal/repository/instance"
+	"github.com/caos/zitadel/internal/telemetry/tracing"
+)
+
+func (c *Commands) AddDefaultMailTemplate(ctx context.Context, policy *domain.MailTemplate) (*domain.MailTemplate, error) {
+	addedPolicy := NewInstanceMailTemplateWriteModel()
+	instanceAgg := InstanceAggregateFromWriteModel(&addedPolicy.MailTemplateWriteModel.WriteModel)
+	event, err := c.addDefaultMailTemplate(ctx, instanceAgg, addedPolicy, policy)
+	if err != nil {
+		return nil, err
+	}
+
+	pushedEvents, err := c.eventstore.Push(ctx, event)
+	if err != nil {
+		return nil, err
+	}
+	err = AppendAndReduce(addedPolicy, pushedEvents...)
+	if err != nil {
+		return nil, err
+	}
+	return writeModelToMailTemplatePolicy(&addedPolicy.MailTemplateWriteModel), nil
+}
+
+func (c *Commands) addDefaultMailTemplate(ctx context.Context, instanceAgg *eventstore.Aggregate, addedPolicy *InstanceMailTemplateWriteModel, policy *domain.MailTemplate) (eventstore.Command, error) {
+	if !policy.IsValid() {
+		return nil, caos_errs.ThrowInvalidArgument(nil, "INSTANCE-fm9sd", "Errors.IAM.MailTemplate.Invalid")
+	}
+	err := c.eventstore.FilterToQueryReducer(ctx, addedPolicy)
+	if err != nil {
+		return nil, err
+	}
+	if addedPolicy.State == domain.PolicyStateActive {
+		return nil, caos_errs.ThrowAlreadyExists(nil, "INSTANCE-5n8fs", "Errors.IAM.MailTemplate.AlreadyExists")
+	}
+
+	return instance.NewMailTemplateAddedEvent(ctx, instanceAgg, policy.Template), nil
+}
+
+func (c *Commands) ChangeDefaultMailTemplate(ctx context.Context, policy *domain.MailTemplate) (*domain.MailTemplate, error) {
+	existingPolicy, changedEvent, err := c.changeDefaultMailTemplate(ctx, policy)
+	if err != nil {
+		return nil, err
+	}
+	pushedEvents, err := c.eventstore.Push(ctx, changedEvent)
+	if err != nil {
+		return nil, err
+	}
+	err = AppendAndReduce(existingPolicy, pushedEvents...)
+	if err != nil {
+		return nil, err
+	}
+	return writeModelToMailTemplatePolicy(&existingPolicy.MailTemplateWriteModel), nil
+}
+
+func (c *Commands) changeDefaultMailTemplate(ctx context.Context, policy *domain.MailTemplate) (*InstanceMailTemplateWriteModel, eventstore.Command, error) {
+	if !policy.IsValid() {
+		return nil, nil, caos_errs.ThrowInvalidArgument(nil, "INSTANCE-4m9ds", "Errors.IAM.MailTemplate.Invalid")
+	}
+	existingPolicy, err := c.defaultMailTemplateWriteModelByID(ctx)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	if existingPolicy.State == domain.PolicyStateUnspecified || existingPolicy.State == domain.PolicyStateRemoved {
+		return nil, nil, caos_errs.ThrowNotFound(nil, "INSTANCE-2N8fs", "Errors.IAM.MailTemplate.NotFound")
+	}
+
+	instanceAgg := InstanceAggregateFromWriteModel(&existingPolicy.MailTemplateWriteModel.WriteModel)
+	changedEvent, hasChanged := existingPolicy.NewChangedEvent(ctx, instanceAgg, policy.Template)
+	if !hasChanged {
+		return nil, nil, caos_errs.ThrowPreconditionFailed(nil, "INSTANCE-3nfsG", "Errors.IAM.MailTemplate.NotChanged")
+	}
+
+	return existingPolicy, changedEvent, nil
+}
+
+func (c *Commands) defaultMailTemplateWriteModelByID(ctx context.Context) (policy *InstanceMailTemplateWriteModel, err error) {
+	ctx, span := tracing.NewSpan(ctx)
+	defer func() { span.EndWithError(err) }()
+
+	writeModel := NewInstanceMailTemplateWriteModel()
+	err = c.eventstore.FilterToQueryReducer(ctx, writeModel)
+	if err != nil {
+		return nil, err
+	}
+	return writeModel, nil
+}