Add Decorators to clean classes before json serialization and remove invalid states.

src/api/util/handlers/Message.ts

@@ -486,7 +486,7 @@ export async function postHandleMessage(message: Message) {
     const content = message.content?.replace(/ *`[^)]*` */g, ""); // remove markdown
 
     const linkMatches = content?.match(LINK_REGEX) || [];
-
+    message.clean_data();
     const data = { ...message };
 
     const currentNormalizedUrls = new Set<string>();

src/util/entities/BaseClass.ts

@@ -20,12 +20,40 @@ import { BaseEntity, BeforeInsert, BeforeUpdate, Column, ColumnOptions, FindOpti
 import { Snowflake } from "../util/Snowflake";
 import { getDatabase } from "../util/Database";
 import { OrmUtils } from "../imports/OrmUtils";
+import { annotationsKey } from "../util/Decorators";
 
 export class BaseClassWithoutId extends BaseEntity {
     private get construct() {
         return this.constructor;
     }
 
+    // stores custom annotations we may stick on the properties
+    [annotationsKey]: { [p: string]: string[] };
+
+    // retrieves the custom annotations as its not super straight forward
+    get_annotations() {
+        return Object.getPrototypeOf(this)[annotationsKey];
+    }
+
+    // Loops through all the keys and compares it to annotations. If the RemoveEmpty is there it sets the value to undefined if null
+    clean_data() {
+        const annotations = this.get_annotations();
+        for (const key in this) {
+            if (
+                key in this && // This object has this property, should never fail but better to be safe
+                key in annotations && // If this property has an annotation
+                annotations[key].indexOf("JsonRemoveEmpty") > -1 && // if one of the annotations is JsonRemoveEmpty
+                (this[key] == null || // If this property is null
+                    (typeof this[key] == "object" && Object.keys(this[key]).length == 0))
+            ) {
+                // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+                // @ts-expect-error
+                this[key] = undefined; // set to undefined to remove
+            }
+        }
+        return this;
+    }
+
     private get metadata() {
         return getDatabase()?.getMetadata(this.construct);
     }

src/util/entities/Message.ts

@@ -31,6 +31,7 @@ import { Attachment } from "./Attachment";
 import { NewUrlUserSignatureData } from "../Signing";
 import { ActionRowComponent, ApplicationCommandType, Embed, MessageSnapshot, MessageType, PartialMessage, Poll, Reaction } from "@spacebar/schemas";
 import { MessageFlags } from "@spacebar/util";
+import { JsonRemoveEmpty } from "../util/Decorators";
 
 @Entity({
     name: "messages",
@@ -122,14 +123,17 @@ export class Message extends BaseClass {
     mention_everyone?: boolean;
 
     @JoinTable({ name: "message_user_mentions" })
+    @JsonRemoveEmpty
     @ManyToMany(() => User)
     mentions: User[];
 
     @JoinTable({ name: "message_role_mentions" })
+    @JsonRemoveEmpty
     @ManyToMany(() => Role)
     mention_roles: Role[];
 
     @JoinTable({ name: "message_channel_mentions" })
+    @JsonRemoveEmpty
     @ManyToMany(() => Channel)
     mention_channels: Channel[];
 
@@ -141,12 +145,15 @@ export class Message extends BaseClass {
         cascade: true,
         orphanedRowAction: "delete",
     })
+    @JsonRemoveEmpty
     attachments?: Attachment[];
 
     @Column({ type: "simple-json" })
+    @JsonRemoveEmpty
     embeds: Embed[];
 
     @Column({ type: "simple-json" })
+    @JsonRemoveEmpty
     reactions: Reaction[];
 
     @Column({ type: "text", nullable: true })
@@ -201,9 +208,11 @@ export class Message extends BaseClass {
     };
 
     @Column({ type: "simple-json", nullable: true })
+    @JsonRemoveEmpty
     components?: ActionRowComponent[];
 
     @Column({ type: "simple-json", nullable: true })
+    @JsonRemoveEmpty
     poll?: Poll;
 
     @Column({ nullable: true })

src/util/util/Decorators.ts

@@ -0,0 +1,21 @@
+import { BaseClassWithoutId } from "@spacebar/util*";
+
+export const annotationsKey = Symbol("Annotations");
+
+// Generates an array using the annotationsKey as a property on a class when annotated with the below decorators
+export function initAnnotationMetadata(target: BaseClassWithoutId, propertyKey: string) {
+    // eslint-disable-next-line @typescript-eslint/no-unused-expressions
+    target[annotationsKey] || (target[annotationsKey] = {});
+    // eslint-disable-next-line @typescript-eslint/no-unused-expressions
+    target[annotationsKey][propertyKey] || (target[annotationsKey][propertyKey] = []);
+}
+
+// Adds to the generated array on the class with the annotation added.
+export function addAnnotationMetadata(target: BaseClassWithoutId, propertyKey: string, annotation: string) {
+    target[annotationsKey] = { ...target[annotationsKey], [propertyKey]: [...target[annotationsKey][propertyKey], annotation] };
+}
+
+export function JsonRemoveEmpty(target: BaseClassWithoutId, propertyKey: string) {
+    initAnnotationMetadata(target, propertyKey);
+    addAnnotationMetadata(target, propertyKey, "JsonRemoveEmpty");
+}