/*
	Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
	Copyright (C) 2023 Spacebar and Spacebar Contributors

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Affero General Public License as published
	by the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Affero General Public License for more details.

	You should have received a copy of the GNU Affero General Public License
	along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

import { BeforeRemove, Column, Entity, JoinColumn, ManyToOne, RelationId } from "typeorm";
import { deleteFile } from "../util";
import { BaseClass } from "./BaseClass";
import { getUrlSignature, NewUrlUserSignatureData, NewUrlSignatureData } from "../Signing";

@Entity({
    name: "attachments",
})
export class Attachment extends BaseClass {
    @Column()
    filename: string; // name of file attached

    @Column()
    size: number; // size of file in bytes

    @Column()
    url: string; // source url of file

    @Column()
    proxy_url: string; // a proxied url of file

    @Column({ nullable: true })
    height?: number; // height of file (if image)

    @Column({ nullable: true })
    width?: number; // width of file (if image)

    @Column({ nullable: true })
    content_type?: string;

    @Column({ nullable: true })
    @RelationId((attachment: Attachment) => attachment.message)
    message_id: string;

    @JoinColumn({ name: "message_id" })
    @ManyToOne(() => require("./Message").Message, (message: import("./Message").Message) => message.attachments, {
        onDelete: "CASCADE",
    })
    message: import("./Message").Message;

    @BeforeRemove()
    onDelete() {
        return deleteFile(new URL(this.url).pathname);
    }

    signUrls(data: NewUrlUserSignatureData): Attachment {
        return {
            ...this,
            url: getUrlSignature(new NewUrlSignatureData({ ...data, url: this.url }))
                .applyToUrl(this.url)
                .toString(),
            proxy_url: getUrlSignature(new NewUrlSignatureData({ ...data, url: this.proxy_url }))
                .applyToUrl(this.proxy_url)
                .toString(),
        };
    }
}