[feature] Allow users to submit `interaction_policy` on new statuses (#3314)

* [feature] Parse `interaction_policy` on status submission

* beep boop

* swagger? i barely know er

docs/api/swagger.yaml

@@ -8826,11 +8826,27 @@ paths:
         post:
             consumes:
                 - application/json
-                - application/xml
                 - application/x-www-form-urlencoded
             description: |-
                 The parameters can also be given in the body of the request, as JSON, if the content-type is set to 'application/json'.
-                The parameters can also be given in the body of the request, as XML, if the content-type is set to 'application/xml'.
+
+                The 'interaction_policy' field can be used to set an interaction policy for this status.
+
+                If submitting using form data, use the following pattern to set an interaction policy:
+
+                `interaction_policy[INTERACTION_TYPE][CONDITION][INDEX]=Value`
+
+                For example: `interaction_policy[can_reply][always][0]=author`
+
+                Using `curl` this might look something like:
+
+                `curl -F 'interaction_policy[can_reply][always][0]=author' -F 'interaction_policy[can_reply][always][1]=followers' [... other form fields ...]`
+
+                The JSON equivalent would be:
+
+                `curl -H 'Content-Type: application/json' -d '{"interaction_policy":{"can_reply":{"always":["author","followers"]}} [... other json fields ...]}'`
+
+                The server will perform some normalization on the submitted policy so that you can't submit something totally invalid.
             operationId: statusCreate
             parameters:
                 - description: |-
@@ -8944,6 +8960,30 @@ paths:
                   name: content_type
                   type: string
                   x-go-name: ContentType
+                - description: Nth entry for interaction_policy.can_favourite.always.
+                  in: formData
+                  name: interaction_policy[can_favourite][always][0]
+                  type: string
+                - description: Nth entry for interaction_policy.can_favourite.with_approval.
+                  in: formData
+                  name: interaction_policy[can_favourite][with_approval][0]
+                  type: string
+                - description: Nth entry for interaction_policy.can_reply.always.
+                  in: formData
+                  name: interaction_policy[can_reply][always][0]
+                  type: string
+                - description: Nth entry for interaction_policy.can_reply.with_approval.
+                  in: formData
+                  name: interaction_policy[can_reply][with_approval][0]
+                  type: string
+                - description: Nth entry for interaction_policy.can_reblog.always.
+                  in: formData
+                  name: interaction_policy[can_reblog][always][0]
+                  type: string
+                - description: Nth entry for interaction_policy.can_reblog.with_approval.
+                  in: formData
+                  name: interaction_policy[can_reblog][with_approval][0]
+                  type: string
             produces:
                 - application/json
             responses:
@@ -8966,7 +9006,7 @@ paths:
             security:
                 - OAuth2 Bearer:
                     - write:statuses
-            summary: Create a new status.
+            summary: Create a new status using the given form field parameters.
             tags:
                 - statuses
     /api/v1/statuses/{id}:

internal/api/client/interactionpolicies/updatedefaults.go

@@ -222,7 +222,7 @@ func (m *Module) PoliciesDefaultsPATCHHandler(c *gin.Context) {
 		return
 	}
 
-	form, err := parseUpdateAccountForm(c)
+	form, err := parseUpdatePoliciesForm(c)
 	if err != nil {
 		apiutil.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGetV1)
 		return
@@ -290,7 +290,7 @@ func customBind(
 	return nil
 }
 
-func parseUpdateAccountForm(c *gin.Context) (*apimodel.UpdateInteractionPoliciesRequest, error) {
+func parseUpdatePoliciesForm(c *gin.Context) (*apimodel.UpdateInteractionPoliciesRequest, error) {
 	form := new(apimodel.UpdateInteractionPoliciesRequest)
 
 	switch ct := c.ContentType(); ct {

internal/api/client/statuses/statuscreate.go

@@ -24,6 +24,8 @@ import (
 	"strconv"
 
 	"github.com/gin-gonic/gin"
+	"github.com/gin-gonic/gin/binding"
+	"github.com/go-playground/form/v4"
 	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
 	apiutil "github.com/superseriousbusiness/gotosocial/internal/api/util"
 	"github.com/superseriousbusiness/gotosocial/internal/config"
@@ -35,10 +37,27 @@ import (
 
 // StatusCreatePOSTHandler swagger:operation POST /api/v1/statuses statusCreate
 //
-// Create a new status.
+// Create a new status using the given form field parameters.
 //
 // The parameters can also be given in the body of the request, as JSON, if the content-type is set to 'application/json'.
-// The parameters can also be given in the body of the request, as XML, if the content-type is set to 'application/xml'.
+//
+// The 'interaction_policy' field can be used to set an interaction policy for this status.
+//
+// If submitting using form data, use the following pattern to set an interaction policy:
+//
+// `interaction_policy[INTERACTION_TYPE][CONDITION][INDEX]=Value`
+//
+// For example: `interaction_policy[can_reply][always][0]=author`
+//
+// Using `curl` this might look something like:
+//
+// `curl -F 'interaction_policy[can_reply][always][0]=author' -F 'interaction_policy[can_reply][always][1]=followers' [... other form fields ...]`
+//
+// The JSON equivalent would be:
+//
+// `curl -H 'Content-Type: application/json' -d '{"interaction_policy":{"can_reply":{"always":["author","followers"]}} [... other json fields ...]}'`
+//
+// The server will perform some normalization on the submitted policy so that you can't submit something totally invalid.
 //
 //	---
 //	tags:
@@ -46,7 +65,6 @@ import (
 //
 //	consumes:
 //	- application/json
-//	- application/xml
 //	- application/x-www-form-urlencoded
 //
 //	parameters:
@@ -181,6 +199,36 @@ import (
 //			- text/plain
 //			- text/markdown
 //		in: formData
+//	-
+//		name: interaction_policy[can_favourite][always][0]
+//		in: formData
+//		description: Nth entry for interaction_policy.can_favourite.always.
+//		type: string
+//	-
+//		name: interaction_policy[can_favourite][with_approval][0]
+//		in: formData
+//		description: Nth entry for interaction_policy.can_favourite.with_approval.
+//		type: string
+//	-
+//		name: interaction_policy[can_reply][always][0]
+//		in: formData
+//		description: Nth entry for interaction_policy.can_reply.always.
+//		type: string
+//	-
+//		name: interaction_policy[can_reply][with_approval][0]
+//		in: formData
+//		description: Nth entry for interaction_policy.can_reply.with_approval.
+//		type: string
+//	-
+//		name: interaction_policy[can_reblog][always][0]
+//		in: formData
+//		description: Nth entry for interaction_policy.can_reblog.always.
+//		type: string
+//	-
+//		name: interaction_policy[can_reblog][with_approval][0]
+//		in: formData
+//		description: Nth entry for interaction_policy.can_reblog.with_approval.
+//		type: string
 //
 //	produces:
 //	- application/json
@@ -223,8 +271,8 @@ func (m *Module) StatusCreatePOSTHandler(c *gin.Context) {
 		return
 	}
 
-	form := &apimodel.StatusCreateRequest{}
+	form, err := parseStatusCreateForm(c)
-	if err := c.ShouldBind(form); err != nil {
+	if err != nil {
 		apiutil.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGetV1)
 		return
 	}
@@ -257,6 +305,75 @@ func (m *Module) StatusCreatePOSTHandler(c *gin.Context) {
 	c.JSON(http.StatusOK, apiStatus)
 }
 
+// intPolicyFormBinding satisfies gin's binding.Binding interface.
+// Should only be used specifically for multipart/form-data MIME type.
+type intPolicyFormBinding struct{}
+
+func (i intPolicyFormBinding) Name() string {
+	return "InteractionPolicy"
+}
+
+func (intPolicyFormBinding) Bind(req *http.Request, obj any) error {
+	if err := req.ParseForm(); err != nil {
+		return err
+	}
+
+	// Change default namespace prefix and suffix to
+	// allow correct parsing of the field attributes.
+	decoder := form.NewDecoder()
+	decoder.SetNamespacePrefix("[")
+	decoder.SetNamespaceSuffix("]")
+
+	return decoder.Decode(obj, req.Form)
+}
+
+func parseStatusCreateForm(c *gin.Context) (*apimodel.StatusCreateRequest, error) {
+	form := new(apimodel.StatusCreateRequest)
+
+	switch ct := c.ContentType(); ct {
+	case binding.MIMEJSON:
+		// Just bind with default json binding.
+		if err := c.ShouldBindWith(form, binding.JSON); err != nil {
+			return nil, err
+		}
+
+	case binding.MIMEPOSTForm:
+		// Bind with default form binding first.
+		if err := c.ShouldBindWith(form, binding.FormPost); err != nil {
+			return nil, err
+		}
+
+		// Now do custom binding.
+		intReqForm := new(apimodel.StatusInteractionPolicyForm)
+		if err := c.ShouldBindWith(intReqForm, intPolicyFormBinding{}); err != nil {
+			return nil, err
+		}
+		form.InteractionPolicy = intReqForm.InteractionPolicy
+
+	case binding.MIMEMultipartPOSTForm:
+		// Bind with default form binding first.
+		if err := c.ShouldBindWith(form, binding.FormMultipart); err != nil {
+			return nil, err
+		}
+
+		// Now do custom binding.
+		intReqForm := new(apimodel.StatusInteractionPolicyForm)
+		if err := c.ShouldBindWith(intReqForm, intPolicyFormBinding{}); err != nil {
+			return nil, err
+		}
+		form.InteractionPolicy = intReqForm.InteractionPolicy
+
+	default:
+		err := fmt.Errorf(
+			"content-type %s not supported for this endpoint; supported content-types are %s, %s, %s",
+			ct, binding.MIMEJSON, binding.MIMEPOSTForm, binding.MIMEMultipartPOSTForm,
+		)
+		return nil, err
+	}
+
+	return form, nil
+}
+
 // validateNormalizeCreateStatus checks the form
 // for disallowed combinations of attachments and
 // overlength inputs.

internal/api/model/status.go

@@ -196,33 +196,44 @@ type StatusCreateRequest struct {
 	// Text content of the status.
 	// If media_ids is provided, this becomes optional.
 	// Attaching a poll is optional while status is provided.
-	Status string `form:"status" json:"status" xml:"status"`
+	Status string `form:"status" json:"status"`
 	// Array of Attachment ids to be attached as media.
 	// If provided, status becomes optional, and poll cannot be used.
-	MediaIDs []string `form:"media_ids[]" json:"media_ids" xml:"media_ids"`
+	MediaIDs []string `form:"media_ids[]" json:"media_ids"`
 	// Poll to include with this status.
-	Poll *PollRequest `form:"poll" json:"poll" xml:"poll"`
+	Poll *PollRequest `form:"poll" json:"poll"`
 	// ID of the status being replied to, if status is a reply.
-	InReplyToID string `form:"in_reply_to_id" json:"in_reply_to_id" xml:"in_reply_to_id"`
+	InReplyToID string `form:"in_reply_to_id" json:"in_reply_to_id"`
 	// Status and attached media should be marked as sensitive.
-	Sensitive bool `form:"sensitive" json:"sensitive" xml:"sensitive"`
+	Sensitive bool `form:"sensitive" json:"sensitive"`
 	// Text to be shown as a warning or subject before the actual content.
 	// Statuses are generally collapsed behind this field.
-	SpoilerText string `form:"spoiler_text" json:"spoiler_text" xml:"spoiler_text"`
+	SpoilerText string `form:"spoiler_text" json:"spoiler_text"`
 	// Visibility of the posted status.
-	Visibility Visibility `form:"visibility" json:"visibility" xml:"visibility"`
+	Visibility Visibility `form:"visibility" json:"visibility"`
 	// Set to "true" if this status should not be federated, ie. it should be a "local only" status.
-	LocalOnly *bool `form:"local_only"`
+	LocalOnly *bool `form:"local_only" json:"local_only"`
 	// Deprecated: Only used if LocalOnly is not set.
-	Federated *bool `form:"federated"`
+	Federated *bool `form:"federated" json:"federated"`
 	// ISO 8601 Datetime at which to schedule a status.
 	// Providing this parameter will cause ScheduledStatus to be returned instead of Status.
 	// Must be at least 5 minutes in the future.
-	ScheduledAt string `form:"scheduled_at" json:"scheduled_at" xml:"scheduled_at"`
+	ScheduledAt string `form:"scheduled_at" json:"scheduled_at"`
 	// ISO 639 language code for this status.
-	Language string `form:"language" json:"language" xml:"language"`
+	Language string `form:"language" json:"language"`
 	// Content type to use when parsing this status.
-	ContentType StatusContentType `form:"content_type" json:"content_type" xml:"content_type"`
+	ContentType StatusContentType `form:"content_type" json:"content_type"`
+	// Interaction policy to use for this status.
+	InteractionPolicy *InteractionPolicy `form:"-" json:"interaction_policy"`
+}
+
+// Separate form for parsing interaction
+// policy on status create requests.
+//
+// swagger:ignore
+type StatusInteractionPolicyForm struct {
+	// Interaction policy to use for this status.
+	InteractionPolicy *InteractionPolicy `form:"interaction_policy" json:"-"`
 }
 
 // Visibility models the visibility of a status.

internal/processing/status/create.go

@@ -117,14 +117,14 @@ func (p *Processor) Create(
 		return nil, errWithCode
 	}
 
-	if err := processVisibility(form, requester.Settings.Privacy, status); err != nil {
+	if err := p.processVisibility(ctx, form, requester.Settings.Privacy, status); err != nil {
 		return nil, gtserror.NewErrorInternalError(err)
 	}
 
-	// Process policy AFTER visibility as it
+	// Process policy AFTER visibility as it relies
-	// relies on status.Visibility being set.
+	// on status.Visibility and form.Visibility being set.
-	if err := processInteractionPolicy(form, requester.Settings, status); err != nil {
+	if errWithCode := processInteractionPolicy(form, requester.Settings, status); errWithCode != nil {
-		return nil, gtserror.NewErrorInternalError(err)
+		return nil, errWithCode
 	}
 
 	if err := processLanguage(form, requester.Settings.Language, status); err != nil {
@@ -337,7 +337,8 @@ func (p *Processor) processMediaIDs(ctx context.Context, form *apimodel.StatusCr
 	return nil
 }
 
-func processVisibility(
+func (p *Processor) processVisibility(
+	ctx context.Context,
 	form *apimodel.StatusCreateRequest,
 	accountDefaultVis gtsmodel.Visibility,
 	status *gtsmodel.Status,
@@ -347,13 +348,17 @@ func processVisibility(
 	case form.Visibility != "":
 		status.Visibility = typeutils.APIVisToVis(form.Visibility)
 
-	// Fall back to account default.
+	// Fall back to account default, set
+	// this back on the form for later use.
 	case accountDefaultVis != "":
 		status.Visibility = accountDefaultVis
+		form.Visibility = p.converter.VisToAPIVis(ctx, accountDefaultVis)
 
-	// What? Fall back to global default.
+	// What? Fall back to global default, set
+	// this back on the form for later use.
 	default:
 		status.Visibility = gtsmodel.VisibilityDefault
+		form.Visibility = p.converter.VisToAPIVis(ctx, gtsmodel.VisibilityDefault)
 	}
 
 	// Set federated according to "local_only" field,
@@ -365,17 +370,32 @@ func processVisibility(
 }
 
 func processInteractionPolicy(
-	_ *apimodel.StatusCreateRequest,
+	form *apimodel.StatusCreateRequest,
 	settings *gtsmodel.AccountSettings,
 	status *gtsmodel.Status,
-) error {
+) gtserror.WithCode {
-	// TODO: parse policy for this
-	// status from form and prefer this.
 
+	// If policy is set on the
+	// form then prefer this.
+	//
 	// TODO: prevent scope widening by
 	// limiting interaction policy if
 	// inReplyTo status has a stricter
 	// interaction policy than this one.
+	if form.InteractionPolicy != nil {
+		p, err := typeutils.APIInteractionPolicyToInteractionPolicy(
+			form.InteractionPolicy,
+			form.Visibility,
+		)
+
+		if err != nil {
+			errWithCode := gtserror.NewErrorBadRequest(err, err.Error())
+			return errWithCode
+		}
+
+		status.InteractionPolicy = p
+		return nil
+	}
 
 	switch status.Visibility {