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/*
This script parses the mass shootings CSV and makes it easier to deal with.
case,
Rite Aid warehouse shooting,
location,date,summary,
"Perryman, MD",
9/20/18,
"Snochia Moseley, 26, reportedly a disgruntled employee, shot her victims outside the building and on the warehouse floor; she later died from a self-inflicted gunshot at a nearby hospital. (No law enforcement officers responding to her attack fired shots.)",
fatalities,injured,total_victims,
3,3,6,
location_type,
age_of_shooter,
Workplace,
26,
prior_signs_mental_health_issues,mental_health_details,
-,-,
weapons_obtained_legally,where_obtained,weapon_type,weapon_details,
Yes,-,semiautomatic handgun,Glock 9 mm,
race,gender,
Black,F,
sources,mental_health_sources,sources_additional_age,
http://www.baltimoresun.com/news/maryland/crime/bs-md-harford-shooting-20180920-story.html; https://www.washingtonpost.com/local/public-safety/maryland-sheriffs-office-says-multiple-victims-in-shooting/2018/09/20/9d2c6464-bcda-11e8-be70-52bd11fe18af_story.html; https://www.cnn.com/2018/09/20/us/maryland-shooting/index.html; https://heavy.com/news/2018/09/snochia-moseley/,-,-,
latitude,longitude,type,year
39.455658,-76.208485,Mass,2018
*/
const fs = require('fs')
const parse = require('csv-parse')
const stringify = require('csv-stringify')
const fields = (
"case," +
"location,date,summary,fatalities,injured,total_victims," +
"location_type," +
"age_of_shooter," +
"prior_signs_mental_health_issues,mental_health_details," +
"weapons_obtained_legally,where_obtained,weapon_type,weapon_details," +
"race,gender," +
"sources,mental_health_sources,sources_additional_age," +
"latitude,longitude,type,year").split(',').reduce((a,b,i) => {
a[b] = i
return a
}, {})
const headings = ["date", "timestamp", "fatalities", "injured", "total_victims", "age", "case", "weapon_type", "weapon_details"]
function test(row){
return (
!!row
// row[fields.incident_characteristics].indexOf('Samaritan') !== -1
// // && row[fields.participant_age_group].indexOf('Teen') !== -1
// && row[fields.participant_age_group].indexOf('Child') !== -1
// && row[fields.gun_type].indexOf('AR-15') !== -1
)
}
function apply(row){
let [m, d, y] = row[fields.date].split('/')
if (y < 20) y = parseInt(y) + 2000
return [
[y, pad(m), pad(d)].join('/'),
+new Date(y, m, d),
row[fields.fatalities],
row[fields.injured],
row[fields.total_victims],
row[fields.age_of_shooter],
row[fields.case],
row[fields.weapon_type].replace(/\s+$/g, ''),
row[fields.weapon_details].replace(/\s+$/g, ''),
]
}
function pad(n) { return (n < 10) ? ("0" + n) : n }
const input = fs.createReadStream('./data/mass_shootings.csv')
const parser = parse()
const stringifier = stringify()
const output = fs.createWriteStream('./data/mass_shootings_lite.csv')
input.on('readable', function() {
let buf
while ((buf = input.read()) !== null) {
parser.write(buf)
}
})
input.on('error', function(err){
console.error('input error', err.message)
})
input.on('finish', function(){
parser.end()
})
let i = 0
parser.on('readable', function(){
let row
while (row = parser.read()) {
if (i === 0) {
stringifier.write(headings)
i += 1
continue
}
if ((++i % 10000) === 0) {
console.log(i + '...')
}
if (test(row)) {
stringifier.write(apply(row))
}
}
})
parser.on('error', function(err){
console.error('parser error', err.message)
})
parser.on('end', function(){
stringifier.end()
})
stringifier.on('readable', function(){
let row
while(row = stringifier.read()){
output.write(row)
}
})
stringifier.on('error', function(err){
console.error('stringifier error', err.message)
})
stringifier.on('finish', function(){
output.end()
})
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