added command with interactive dialog

server/permissions.go

@@ -0,0 +1,37 @@
+package main
+
+import "github.com/mattermost/mattermost/server/public/model"
+
+// userHasRemovePermissionsToPost checks if the user has permissions to remove attachments from a post
+// based on the post ID, the user ID, and the channel ID.
+// Returns an error message if the user does not have permissions, or an empty string if the user has permissions.
+func (p *Plugin) userHasRemovePermissionsToPost(userID, channelID, postID string) string {
+	// Check if the post exists
+	post, appErr := p.API.GetPost(postID)
+	if appErr != nil {
+		return "Post does not exist"
+	}
+
+	// Check if the post has attachments
+	if len(post.FileIds) == 0 {
+		return "Post has no attachments"
+	}
+
+	// Check if the user is the post author or has permissions to edit others posts
+	user, appErr := p.API.GetUser(userID)
+	if appErr != nil {
+		return "Internal error, check with your system administrator for assistance"
+	}
+
+	if post.UserId != user.Id && !p.API.HasPermissionToChannel(userID, channelID, model.PermissionEditOthersPosts) {
+		return "Not authorized"
+	}
+
+	// Check if the post is editable at this point in time
+	config := p.API.GetConfig()
+	if config.ServiceSettings.PostEditTimeLimit != nil && *config.ServiceSettings.PostEditTimeLimit > 0 && model.GetMillis() > post.CreateAt+int64(*config.ServiceSettings.PostEditTimeLimit*1000) {
+		return "Post is too old to edit"
+	}
+
+	return ""
+}