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package arn
import (
"errors"
"fmt"
"reflect"
"strings"
"github.com/aerogo/aero"
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"github.com/aerogo/aero/event"
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"github.com/aerogo/api"
"github.com/aerogo/markdown"
"github.com/animenotifier/notify.moe/arn/autocorrect"
"github.com/animenotifier/notify.moe/arn/limits"
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)
// Force interface implementations
var (
_ Postable = (*Post)(nil)
_ Likeable = (*Post)(nil)
_ LikeEventReceiver = (*Post)(nil)
_ PostParent = (*Post)(nil)
_ fmt.Stringer = (*Post)(nil)
_ api.Newable = (*Post)(nil)
_ api.Editable = (*Post)(nil)
_ api.Actionable = (*Post)(nil)
_ api.Deletable = (*Post)(nil)
)
// Actions
func init() {
API.RegisterActions("Post", []*api.Action{
// Like post
LikeAction(),
// Unlike post
UnlikeAction(),
})
}
// Authorize returns an error if the given API POST request is not authorized.
func (post *Post) Authorize(ctx aero.Context, action string) error {
if !ctx.HasSession() {
return errors.New("Neither logged in nor in session")
}
if action == "edit" {
user := GetUserFromContext(ctx)
if post.CreatedBy != user.ID && user.Role != "admin" {
return errors.New("Can't edit the posts of other users")
}
}
return nil
}
// Create sets the data for a new post with data we received from the API request.
func (post *Post) Create(ctx aero.Context) error {
data, err := ctx.Request().Body().JSONObject()
if err != nil {
return err
}
user := GetUserFromContext(ctx)
if user == nil {
return errors.New("Not logged in")
}
post.ID = GenerateID("Post")
post.Text, _ = data["text"].(string)
post.CreatedBy = user.ID
post.ParentID, _ = data["parentId"].(string)
post.ParentType, _ = data["parentType"].(string)
post.Created = DateTimeUTC()
post.Edited = ""
// Check parent type
if !DB.HasType(post.ParentType) {
return errors.New("Invalid parent type: " + post.ParentType)
}
// Post-process text
post.Text = autocorrect.PostText(post.Text)
if len(post.Text) < limits.PostMinCharacters {
return fmt.Errorf("Text too short: Should be at least %d characters", limits.PostMinCharacters)
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}
// Tags
tags, _ := data["tags"].([]interface{})
post.Tags = make([]string, len(tags))
for i := range post.Tags {
post.Tags[i] = tags[i].(string)
}
// Parent
parent := post.Parent()
if parent == nil {
return errors.New(post.ParentType + " does not exist")
}
// Is the parent locked?
if IsLocked(parent) {
return errors.New(post.ParentType + " is locked")
}
// Don't allow posting when you're not a group member
topMostParent := post.TopMostParent()
if topMostParent.TypeName() == "Group" {
group := topMostParent.(*Group)
if !group.HasMember(user.ID) {
return errors.New("Only group members can post in groups")
}
}
// Append to posts
parent.AddPost(post.ID)
// Save the parent thread
parent.Save()
// Send notification to the author of the parent post
go func() {
notifyUser := parent.Creator()
// Does the parent have a creator?
if notifyUser == nil {
return
}
// Don't notify the author himself
if notifyUser.ID == post.CreatedBy {
return
}
title := user.Nick + " replied"
message := ""
switch post.ParentType {
case "Post":
message = fmt.Sprintf("%s replied to your comment in \"%s\".", user.Nick, parent.(*Post).Parent().TitleByUser(notifyUser))
case "User":
title = fmt.Sprintf("%s wrote a comment on your profile.", user.Nick)
message = post.Text
case "Group":
title = fmt.Sprintf(`%s wrote a new post in the group "%s".`, user.Nick, parent.TitleByUser(nil))
message = post.Text
default:
message = fmt.Sprintf(`%s replied in the %s "%s".`, user.Nick, strings.ToLower(post.ParentType), parent.TitleByUser(notifyUser))
}
notification := &PushNotification{
Title: title,
Message: message,
Icon: "https:" + user.AvatarLink("large"),
Link: post.Link(),
Type: NotificationTypeForumReply,
}
// If you're posting to a group,
// all members except the author will receive a notification.
if post.ParentType == "Group" {
group := parent.(*Group)
group.SendNotification(notification, user.ID)
return
}
notifyUser.SendNotification(notification)
}()
// Write log entry
logEntry := NewEditLogEntry(user.ID, "create", "Post", post.ID, "", "", "")
logEntry.Save()
// Create activity
activity := NewActivityCreate("Post", post.ID, user.ID)
activity.Save()
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// Broadcast event to all users so they can reload the activity page if needed
for receiver := range StreamUsers() {
activityEvent := event.New("post activity", receiver.IsFollowing(user.ID))
receiver.BroadcastEvent(activityEvent)
}
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return nil
}
// Edit saves a log entry for the edit.
func (post *Post) Edit(ctx aero.Context, key string, value reflect.Value, newValue reflect.Value) (bool, error) {
consumed := false
user := GetUserFromContext(ctx)
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// This should stay a switch statement.
// nolint:gocritic
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switch key {
case "ParentID":
var newParent PostParent
newParentID := newValue.String()
newParent, err := GetPost(newParentID)
if err != nil {
newParent, err = GetThread(newParentID)
if err != nil {
return false, err
}
}
post.SetParent(newParent)
consumed = true
case "Text":
newText := newValue.String()
newText = autocorrect.PostText(newText)
if len(newText) < limits.PostMinCharacters {
return false, fmt.Errorf("Text too short: Should be at least %d characters", limits.PostMinCharacters)
}
post.Text = newText
consumed = true
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}
// Write log entry
logEntry := NewEditLogEntry(user.ID, "edit", "Post", post.ID, key, fmt.Sprint(value.Interface()), fmt.Sprint(newValue.Interface()))
logEntry.Save()
return consumed, nil
}
// OnAppend saves a log entry.
func (post *Post) OnAppend(ctx aero.Context, key string, index int, obj interface{}) {
onAppend(post, ctx, key, index, obj)
}
// OnRemove saves a log entry.
func (post *Post) OnRemove(ctx aero.Context, key string, index int, obj interface{}) {
onRemove(post, ctx, key, index, obj)
}
// AfterEdit sets the edited date on the post object.
func (post *Post) AfterEdit(ctx aero.Context) error {
post.Edited = DateTimeUTC()
post.html = markdown.Render(post.Text)
return nil
}
// DeleteInContext deletes the post in the given context.
func (post *Post) DeleteInContext(ctx aero.Context) error {
user := GetUserFromContext(ctx)
// Write log entry
logEntry := NewEditLogEntry(user.ID, "delete", "Post", post.ID, "", fmt.Sprint(post), "")
logEntry.Save()
return post.Delete()
}
// Delete deletes the post from the database.
func (post *Post) Delete() error {
// Remove child posts first
for _, post := range post.Posts() {
err := post.Delete()
if err != nil {
return err
}
}
parent := post.Parent()
if parent == nil {
return fmt.Errorf("Invalid %s parent ID: %s", post.ParentType, post.ParentID)
}
// Remove the reference of the post in the thread that contains it
if !parent.RemovePost(post.ID) {
return fmt.Errorf("This post does not exist in the %s", strings.ToLower(post.ParentType))
}
parent.Save()
// Remove activities
for activity := range StreamActivityCreates() {
if activity.ObjectID == post.ID && activity.ObjectType == "Post" {
err := activity.Delete()
if err != nil {
return err
}
}
}
DB.Delete("Post", post.ID)
return nil
}
// Save saves the post object in the database.
func (post *Post) Save() {
DB.Set("Post", post.ID, post)
}