project file beginnings

1 files changed, 93 insertions, 0 deletions

diff --git a/project.ts b/project.ts
new file mode 100644
index 0000000..ff5f941
--- /dev/null
+++ b/project.ts
@@ -0,0 +1,93 @@
+import { MediaInfo as Mediainfo, ResultObject } from 'mediainfo.js/dist/types';
+import JSZip from 'jszip';
+import { TimedVideoPlayer } from './pages/present';
+
+// garbage garbage garbage
+declare var MediaInfo: () => Promise<Mediainfo>;
+
+const filext = '.prspr';
+
+export class LocalVideo {
+	source: ArrayBuffer;
+	fileext: string;
+	mimetype: `video/${string}`;
+	type: string;
+
+	framerate: number;
+	framecount: number;
+
+	constructor() {
+		this.type = 'local';
+	}
+
+	async load(data: ArrayBuffer) {
+		this.source = data;
+		var mediainfo = await MediaInfo();
+		var result = await mediainfo.analyzeData(
+			() => this.source.byteLength,
+			(size, offset) => new Uint8Array(this.source.slice(offset, offset + size)),
+		) as ResultObject;
+
+		var meta = result.media.track[0] as unknown as {
+			FrameCount: string;
+			FrameRate: string;
+		};
+
+		this.framecount = Number(meta.FrameCount);
+		this.framerate = Number(meta.FrameRate);
+	}
+
+	save(dir: JSZip) {
+		dir.file('video.' + this.fileext, this.source);
+	}
+}
+
+export type VideoSources = [LocalVideo];
+
+export default class {
+	version: string;
+	zip: JSZip;
+	project: TimedVideoPlayer['timeline'];
+	video: VideoSources[number];
+
+	constructor() {
+		this.version = '0.1.0';
+		this.zip = new JSZip();
+	}
+
+	loadProjectFile(data: Blob) {
+		this.zip = new JSZip(data);
+	}
+
+	async downloadProjectFile() {
+		var zip = await this.zip.generateAsync({ type: 'blob' });
+		var blob = new Blob([zip], { type: 'application/octet-stream' });
+		var a = document.createElement('a');
+		a.href = URL.createObjectURL(blob);
+		a.download = this.project.name
+			.toLowerCase()
+			.replace(/\s/g, '-') + filext;
+		a.click();
+	}
+
+	loadProject(project: TimedVideoPlayer['timeline']) {
+		this.project = project;
+	}
+
+	saveProject() {
+		var meta = this.zip.folder('meta');
+		meta.file('version', this.version);
+		meta.file('name', this.project.name);
+
+		var settings = this.zip.folder('settings');
+		settings.file('controlType', this.project.settings.controlType);
+
+		var source = this.zip.folder('source');
+		this.video.save(source);
+
+		this.zip.file('slides', JSON.stringify(this.project.slides, null, 4));
+	}
+
+	openProject() {
+	}
+}