JQ create json array using bash

Question

I am currently trying to get information about my file hosting accounts. As I keep a lot of my backup media on different accounts. I am using megatools to query information about the account, which I then parse into an array. The array is then flattened using \n for raw input.

The script works wonderfully but its not creating valid json. I am not sure what I am missing to make it valid. Thanks for the help in advance.

script

function join_by { local IFS="$1"; shift; echo "$*"; }

while IFS='' read -r line || [[ -n "$line" ]]; do
    IFS=, read -ra array <<< "$line"

    nickname=${array[0]}
    user=${array[1]}
    pass=${array[2]}
    data=($(megadf --username=$user --password=$pass))
    data[${#data[@]}]+="$nickname"

    stats=$(join_by $'\n' ${data[@]})

    echo $stats | jq --slurp --raw-input 'split("\n")[:-1] | map([ split(" ")[] ]) | map({
    nick: .[6],
    total: .[1],
    used: .[3],
    free: .[5]
    })' >> /opt/stats/json/accounts.json

done < .accounts

json output

[
  {
    "nick": "alt",
    "total": "53687091200",
    "used": "7885201595",
    "free": "45801889605"
  }
]
[
  {
    "nick": "main",
    "total": "214748364800",
    "used": "87240914483",
    "free": "127507450317"
  }
]

What should be

[
  {
    "nick": "alt",
    "total": "53687091200",
    "used": "7885201595",
    "free": "45801889605"
  },
  {
    "nick": "main",
    "total": "214748364800",
    "used": "87240914483",
    "free": "127507450317"
  }
]

.accounts

nickname,user,pass

Answer 1

@barmar found the simplest solution that I overlooked....

Needed to pipe the loop into jq

while IFS='' read -r line || [[ -n "$line" ]]; do
    IFS=, read -ra array <<< "$line"
    nickname=${array[0]}
    user=${array[1]}
    pass=${array[2]}
    data=($(megadf --username=$user --password=$pass))
    data[${#data[@]}]+="$nickname"
    stats=$(join_by $'\n' ${data[@]})
    echo $stats
done < .accounts  | jq --slurp --raw-input 'split("\n")[:-1] | map([ split(" ")[] ]) | map({
    nick: .[6],
    total: .[1],
    used: .[3],
    free: .[5]
    })' >> /opt/stats/json/accounts.json