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import { marked } from "marked";
import { UiLogicError } from "@/common";
import base64 from "@/utilities/base64";
import { HttpTimelinePostPostRequest } from "@/http/timeline";
class TimelinePostMarkedRenderer extends marked.Renderer {
constructor(private _images: { file: File; url: string }[]) {
super();
}
image(href: string | null, title: string | null, text: string): string {
if (href != null) {
const i = parseInt(href);
if (!isNaN(i) && i > 0 && i <= this._images.length) {
href = this._images[i - 1].url;
}
}
return this.image(href, title, text);
}
}
export default class TimelinePostBuilder {
private _onChange: () => void;
private _text = "";
private _images: { file: File; url: string }[] = [];
private _markedOptions: marked.MarkedOptions;
constructor(onChange: () => void) {
this._onChange = onChange;
this._markedOptions = {
renderer: new TimelinePostMarkedRenderer(this._images),
};
}
setMarkdownText(text: string): void {
this._text = text;
this._onChange();
}
appendImage(file: File): void {
this._images = this._images.slice();
this._images.push({
file,
url: URL.createObjectURL(file),
});
this._onChange();
}
moveImage(oldIndex: number, newIndex: number): void {
if (oldIndex < 0 || oldIndex >= this._images.length) {
throw new UiLogicError("Old index out of range.");
}
if (newIndex < 0) {
newIndex = 0;
}
if (newIndex >= this._images.length) {
newIndex = this._images.length - 1;
}
this._images = this._images.slice();
const [old] = this._images.splice(oldIndex, 1);
this._images.splice(newIndex, 0, old);
this._onChange();
}
deleteImage(index: number): void {
if (index < 0 || index >= this._images.length) {
throw new UiLogicError("Old index out of range.");
}
this._images = this._images.slice();
URL.revokeObjectURL(this._images[index].url);
this._images.splice(index, 1);
this._onChange();
}
get text(): string {
return this._text;
}
get images(): { file: File; url: string }[] {
return this._images;
}
get isEmpty(): boolean {
return this._text.length === 0 && this._images.length === 0;
}
renderHtml(): string {
return marked.parse(this._text, {
mangle: false,
headerIds: false,
});
}
dispose(): void {
for (const image of this._images) {
URL.revokeObjectURL(image.url);
}
this._images = [];
}
async build(): Promise<HttpTimelinePostPostRequest["dataList"]> {
return [
{
contentType: "text/markdown",
data: await base64(this._text),
},
...(await Promise.all(
this._images.map((image) =>
base64(image.file).then((data) => ({
contentType: image.file.type,
data,
})),
),
)),
];
}
}
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