gnss-tool-kit/src/render/api/util.js

export function filterNonNumber (array) {
  return array.filter(n => typeof n === 'number')
}

export function mulAdd (nums) {
  nums = filterNonNumber(nums)

  return nums.reduce((all, num) => all + num, 0)
}

export function getTwoPointDistance (pointOne, pointTwo) {
  const minusX = Math.abs(pointOne[0] - pointTwo[0])

  const minusY = Math.abs(pointOne[1] - pointTwo[1])

  return Math.sqrt(minusX * minusX + minusY * minusY)
}

export function getPolylineLength(points) {
	const lineSegments = new Array(points.length - 1)
    .fill(0)
    .map((foo, i) => [points[i], points[i + 1]])

  const lengths = lineSegments.map(item => getTwoPointDistance(...item))

  return mulAdd(lengths)
}

export function get_in_positioning_id(GSAArr) {
	let in_positioning_id = []
	GSAArr.forEach(({ satellites }) => {
		in_positioning_id.push(...satellites)
	});

	return in_positioning_id
}

export function getNMEAObj(nmeaStr) {
  if (!nmeaStr) return

  return JSON.parse(nmeaStr)
}

export function getGSAGSV (nmeaStr) {
  const nmeaObj = getNMEAObj(nmeaStr)
  if (!nmeaObj || !nmeaObj.GSV || !nmeaObj.GSA) return null

  const { GSV, GSA } = nmeaObj
  const bd = {
    GSVArr: GSV.filter((gsv) => gsv.talker_id === 'BD'),
    GSAArr: GSA.filter((gsa) => gsa.talker_id === 'BD')
  }
  const gp = {
    GSVArr: GSV.filter((gsv) => gsv.talker_id === 'GP'),
    GSAArr: GSA.filter((gsa) => gsa.talker_id === 'GP')
  }
  const gl = {
    GSVArr: GSV.filter((gsv) => gsv.talker_id === 'GL'),
    GSAArr: GSA.filter((gsa) => gsa.talker_id === 'GL')
  }
  const ga = {
    GSVArr: GSV.filter((gsv) => gsv.talker_id === 'GA'),
    GSAArr: GSA.filter((gsa) => gsa.talker_id === 'GA')
  }

  return { bd, gp, gl, ga }
}