Use shell script parameter to generate js code

aggregate_all_date.js.sh

#!/bin/bash
#Code for generate JavaScript code, to aggregate mongo

if [ $# -ne 2 ]; then
cat <<__EOT__
Give me two parameters
- Decimal place of Resolution (If set 2, output resolution is 0.01)
- Aggregate collection name

Usage:
  aggregate_all_date.js.sh 2 cloud_mask | mongo wtps20xx

__EOT__
  exit 1
fi

cat <<__JS__
//同じ位置のスコアを全期間で集計する
var COORDINATE_DECIMAL = ${1};
var aggregateCollection = "${2}";

print('Start aggregate by location and date')
print(Date());

// 小数桁を指定したまるめ
// round(49.11627197265625, 3) => 49.116
function round(val, decimal) {
  val = val * Math.pow(10, decimal);
  val = Math.round(val);
  val = val / Math.pow(10, decimal);
  return val;
}
 
// lat, lonが近い物が同じキーとなる
function map() {
  var key = round(this.loc.lat, COORDINATE_DECIMAL) + '_' + round(this.loc.lon, COORDINATE_DECIMAL);
  emit(key, {
    score: this.score,
    low: this.low,
    count: 1
  });
}

// scoreとlowを積みあげる
function reduce(key, values) {
  var totalScore = 0,
      totalLow = 0,
      totalCount = 0;

  values.forEach(function(v) {
    totalScore += Number(v.score);
    totalLow += Number(v.low);
    totalCount += v.count;
  });

  return {
    score: totalScore,
    low: totalLow,
    count: totalCount
  }
}

function finalize(key, value) {
  var keys = key.split('_');
  return {
    loc: {
      lat: Number(keys[0]),
      lon: Number(keys[1])
    },
    totalScore: value.score,
    totalLow: value.low,
    count: value.count,
    score: round(value.score / value.count, 4),
    low: round(value.low / value.count, 4)
  }
}

var outCollection = 'alldate_scale' + COORDINATE_DECIMAL;
var res = db[aggregateCollection].mapReduce(map, reduce, {
  out: outCollection,
  finalize: finalize,
  scope: {
    round: round,
    COORDINATE_DECIMAL: COORDINATE_DECIMAL
  },
  verbose: true
});

print('count: ', db[outCollection].find().count());
print('Finished. Created collection ', outCollection);
print(Date());
print('===========================');

__JS__