@thi.ng/imago/path.js

JSON & API-based declarative and extensible image processing trees/pipelines

import { isFunction } from "@thi.ng/checks";
import {
  FMT_HH,
  FMT_HHmmss_ALT,
  FMT_MM,
  FMT_dd,
  FMT_mm,
  FMT_ss,
  FMT_ww,
  FMT_yyyy,
  FMT_yyyyMMdd_ALT
} from "@thi.ng/date";
import { illegalArgs as unsupported } from "@thi.ng/errors";
import { createHash } from "node:crypto";
import { basename, isAbsolute, join, resolve } from "node:path";
const _ = void 0;
const formatPath = (path, ctx, spec, buf) => {
  path = path.replace(/\{(\w+)\}/g, (match, id) => {
    const custom = ctx.opts.pathParts?.[id];
    if (custom != null) {
      return isFunction(custom) ? custom(ctx, spec, buf) : custom;
    }
    switch (id) {
      case "name": {
        !path && unsupported(
          "cannot format `{name}`, image has no file source"
        );
        const name = basename(ctx.path);
        const idx = name.lastIndexOf(".");
        return idx > 0 ? name.substring(0, idx) : name;
      }
      case "sha1":
      case "sha224":
      case "sha256":
      case "sha384":
      case "sha512":
        return createHash(id).update(buf).digest("hex").substring(0, 8);
      case "w":
        return String(ctx.size[0]);
      case "h":
        return String(ctx.size[1]);
      case "aspect": {
        const [w, h] = ctx.size;
        return w > h ? "l" : w < h ? "p" : "sq";
      }
      case "date":
        return FMT_yyyyMMdd_ALT(_, true);
      case "time":
        return FMT_HHmmss_ALT(_, true);
      case "year":
        return FMT_yyyy(_, true);
      case "month":
        return FMT_MM(_, true);
      case "week":
        return FMT_ww(_, true);
      case "day":
        return FMT_dd(_, true);
      case "hour":
        return FMT_HH(_, true);
      case "minute":
        return FMT_mm(_, true);
      case "second":
        return FMT_ss(_, true);
    }
    return match;
  });
  return isAbsolute(path) ? path : join(resolve(ctx.opts.outDir || "."), path);
};
export {
  formatPath
};