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Filename : finder-pattern.js

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const getSymbolSize = require('./utils').getSymbolSize
const FINDER_PATTERN_SIZE = 7

/**
 * Returns an array containing the positions of each finder pattern.
 * Each array's element represent the top-left point of the pattern as (x, y) coordinates
 *
 * @param  {Number} version QR Code version
 * @return {Array}          Array of coordinates
 */
exports.getPositions = function getPositions (version) {
  const size = getSymbolSize(version)

  return [
    // top-left
    [0, 0],
    // top-right
    [size - FINDER_PATTERN_SIZE, 0],
    // bottom-left
    [0, size - FINDER_PATTERN_SIZE]
  ]
}