server/lib/conflicts.js

Repository

wynajem_motorowek

Original path

server/lib/conflicts.js

Role

SOURCE

Size

1151 bytes

Lines

40

SHA-256

1030fd2fc70c322fd4cfbe82baab7b1faf54ff36c42bcb000b3deeb87cc3bd05

Displayed range

1–40

const { DAY_START_MIN, DAY_END_MIN, minutesToTimeText } = require("./time");

function hasOverlap(startMs, endMs, existingBlocks) {
  return existingBlocks.some((block) => startMs < block.endMs && endMs > block.startMs);
}

function findSuggestion({ startMin, endMin, blocksInDay }) {
  const duration = endMin - startMin;
  const normalized = blocksInDay
    .map((item) => ({ startMin: item.startMin, endMin: item.endMin }))
    .filter((item) => item.endMin > DAY_START_MIN && item.startMin < DAY_END_MIN)
    .sort((a, b) => a.startMin - b.startMin);

  let candidate = startMin;
  for (const item of normalized) {
    if (candidate + duration <= item.startMin) {
      return {
        start: minutesToTimeText(candidate),
        end: minutesToTimeText(candidate + duration),
      };
    }
    if (candidate < item.endMin) {
      candidate = item.endMin;
    }
  }

  if (candidate + duration <= DAY_END_MIN) {
    return {
      start: minutesToTimeText(candidate),
      end: minutesToTimeText(candidate + duration),
    };
  }

  return null;
}

module.exports = {
  hasOverlap,
  findSuggestion,
};