refactor: add deprecation util for plugin framework

internal/deprecation/deprecation_plugin.go

@@ -0,0 +1,81 @@
+package deprecation
+
+import (
+	"context"
+	"time"
+
+	"github.com/hashicorp/terraform-plugin-framework/attr"
+	datasourceschema "github.com/hashicorp/terraform-plugin-framework/datasource/schema"
+	"github.com/hashicorp/terraform-plugin-framework/diag"
+	resourceschema "github.com/hashicorp/terraform-plugin-framework/resource/schema"
+	"github.com/hashicorp/terraform-plugin-framework/types"
+	"github.com/hetznercloud/hcloud-go/hcloud"
+)
+
+type Model struct {
+	IsDeprecated         types.Bool   `tfsdk:"is_deprecated"`
+	DeprecationAnnounced types.String `tfsdk:"deprecation_announced"`
+	UnavailableAfter     types.String `tfsdk:"unavailable_after"`
+}
+
+type DeprecationModel = Model //nolint:revive
+
+func NewModel(_ context.Context, in hcloud.Deprecatable) (Model, diag.Diagnostics) {
+	var data Model
+	var diags diag.Diagnostics
+
+	if in.IsDeprecated() {
+		data.IsDeprecated = types.BoolValue(true)
+		data.DeprecationAnnounced = types.StringValue(in.DeprecationAnnounced().Format(time.RFC3339))
+		data.UnavailableAfter = types.StringValue(in.UnavailableAfter().Format(time.RFC3339))
+	} else {
+		data.IsDeprecated = types.BoolValue(false)
+
+		// TODO: Stored values should be types.StringNull(), but we use an empty string
+		// for backward compatibility with the SDK.
+		data.DeprecationAnnounced = types.StringValue("")
+		data.UnavailableAfter = types.StringValue("")
+	}
+
+	return data, diags
+}
+
+func AttrTypes() map[string]attr.Type {
+	return map[string]attr.Type{
+		"is_deprecated":         types.BoolType,
+		"deprecation_announced": types.StringType,
+		"unavailable_after":     types.StringType,
+	}
+}
+
+func DataSourceSchema() map[string]datasourceschema.Attribute {
+	return map[string]datasourceschema.Attribute{
+		"is_deprecated": datasourceschema.BoolAttribute{
+			Computed: true,
+		},
+		"deprecation_announced": datasourceschema.StringAttribute{
+			Computed: true,
+			Optional: true,
+		},
+		"unavailable_after": datasourceschema.StringAttribute{
+			Computed: true,
+			Optional: true,
+		},
+	}
+}
+
+func ResourceSchema() map[string]resourceschema.Attribute {
+	return map[string]resourceschema.Attribute{
+		"is_deprecated": resourceschema.BoolAttribute{
+			Computed: true,
+		},
+		"deprecation_announced": resourceschema.StringAttribute{
+			Computed: true,
+			Optional: true,
+		},
+		"unavailable_after": resourceschema.StringAttribute{
+			Computed: true,
+			Optional: true,
+		},
+	}
+}