src/lib/format.ts - master - aaronair/Test_task_rt_solution

src/lib/format.ts
104 строки3 KB
Ilikedrinkpivo
first_commit
28 май 2026, 14:51
28 май 2026, 14:51b4498fc
export function formatDate(iso: string): string {
  const d = new Date(iso);
  if (Number.isNaN(d.getTime())) return iso;
  return d.toLocaleDateString("ru-RU", {
    day: "2-digit",
    month: "long",
    year: "numeric",
  });
}

export function formatDateTime(iso: string): string {
  const d = new Date(iso);
  if (Number.isNaN(d.getTime())) return iso;
  return d.toLocaleString("ru-RU", {
    day: "2-digit",
    month: "long",
    year: "numeric",
    hour: "2-digit",
    minute: "2-digit",
  });
}

export function pluralize(
  n: number,
  forms: [string, string, string],
): string {
  const abs = Math.abs(n) % 100;
  const mod10 = abs % 10;
  if (abs > 10 && abs < 20) return forms[2];
  if (mod10 > 1 && mod10 < 5) return forms[1];
  if (mod10 === 1) return forms[0];
  return forms[2];
}

export function formatFileSize(sizeKb: number): string {
  if (sizeKb < 1024) return `${sizeKb} КБ`;
  return `${(sizeKb / 1024).toFixed(1)} МБ`;
}

export function formatQuarter(iso: string | undefined): string | null {
  if (!iso) return null;
  const d = new Date(iso);
  if (Number.isNaN(d.getTime())) return null;
  const q = Math.floor(d.getMonth() / 3) + 1;
  return `Q${q} ${d.getFullYear()}`;
}

export function getQuarterKey(iso: string | undefined): string | null {
  if (!iso) return null;
  const d = new Date(iso);
  if (Number.isNaN(d.getTime())) return null;
  const q = Math.floor(d.getMonth() / 3) + 1;
  return `${d.getFullYear()}-Q${q}`;
}

export function getYearAndQuarter(
  iso: string | undefined,
): { year: number; quarter: number } | null {
  if (!iso) return null;
  const d = new Date(iso);
  if (Number.isNaN(d.getTime())) return null;
  return {
    year: d.getFullYear(),
    quarter: Math.floor(d.getMonth() / 3) + 1,
  };
}

export function formatMonthYear(iso: string | undefined): string | null {
  if (!iso) return null;
  const d = new Date(iso);
  if (Number.isNaN(d.getTime())) return null;
  return d.toLocaleDateString("ru-RU", { month: "long", year: "numeric" });
}

/** Форматирует число в млн для отображения; null/0 — не показывать */
export function formatMillions(value: number | null | undefined): string | null {
  if (value == null || value === 0) return null;
  return `${value} млн`;
}

export function countWords(text: string): number {
  return text.trim().split(/\s+/).filter(Boolean).length;
}

export function slugifyName(name: string): string {
  const map: Record<string, string> = {
    а: "a", б: "b", в: "v", г: "g", д: "d", е: "e", ё: "e", ж: "zh",
    з: "z", и: "i", й: "y", к: "k", л: "l", м: "m", н: "n", о: "o",
    п: "p", р: "r", с: "s", т: "t", у: "u", ф: "f", х: "h", ц: "ts",
    ч: "ch", ш: "sh", щ: "sch", ъ: "", ы: "y", ь: "", э: "e", ю: "yu", я: "ya",
  };
  return name
    .toLowerCase()
    .split(/\s+/)
    .map((part) =>
      part
        .split("")
        .map((c) => map[c] ?? c)
        .join(""),
    )
    .join("-")
    .replace(/[^a-z0-9-]/g, "")
    .replace(/-+/g, "-");
}