1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
import { execAsync, GLib, type Variable } from "astal";
import { thumbnailer as config } from "config";
export interface ThumbOpts {
width?: number;
height?: number;
exact?: boolean;
}
export default class Thumbnailer {
static readonly thumbnailDir = `${CACHE}/thumbnails`;
static readonly #running = new Set<string>();
static getOpt<T extends keyof ThumbOpts>(opt: T, opts: ThumbOpts) {
return opts[opt] ?? (config.defaults[opt] as Variable<NonNullable<ThumbOpts[T]>>).get();
}
static async getThumbPath(path: string, opts: ThumbOpts) {
const hash = (await execAsync(`sha1sum ${path}`)).split(" ")[0];
const size = `${this.getOpt("width", opts)}x${this.getOpt("height", opts)}`;
const exact = this.getOpt("exact", opts) ? "-exact" : "";
return `${this.thumbnailDir}/${hash}@${size}${exact}.png`;
}
static async shouldThumbnail(path: string, opts: ThumbOpts) {
const [w, h] = (await execAsync(`identify -ping -format "%w %h" ${path}`)).split(" ").map(parseInt);
return w > this.getOpt("width", opts) || h > this.getOpt("height", opts);
}
static async #thumbnail(path: string, opts: ThumbOpts, attempts: number): Promise<string> {
const thumbPath = await this.getThumbPath(path, opts);
try {
const width = this.getOpt("width", opts);
const height = this.getOpt("height", opts);
const cropCmd = this.getOpt("exact", opts)
? `-background none -gravity center -extent ${width}x${height}`
: "";
await execAsync(`magick ${path} -thumbnail ${width}x${height}^ ${cropCmd} -unsharp 0x.5 ${thumbPath}`);
} catch {
if (attempts >= config.maxAttempts.get()) {
console.error(`Failed to generate thumbnail for ${path}`);
return path;
}
await new Promise(r => setTimeout(r, config.timeBetweenAttempts.get()));
return this.#thumbnail(path, opts, attempts + 1);
}
return thumbPath;
}
static async thumbnail(path: string, opts: ThumbOpts = {}): Promise<string> {
if (!(await this.shouldThumbnail(path, opts))) return path;
let thumbPath = await this.getThumbPath(path, opts);
// Wait for existing thumbnail for path to finish
while (this.#running.has(path)) await new Promise(r => setTimeout(r, 100));
// If no thumbnail, generate
if (!GLib.file_test(thumbPath, GLib.FileTest.EXISTS)) {
this.#running.add(path);
thumbPath = await this.#thumbnail(path, opts, 0);
this.#running.delete(path);
}
return thumbPath;
}
// Static class
private constructor() {}
static {
GLib.mkdir_with_parents(this.thumbnailDir, 0o755);
}
}
|
