Convert JSON to CSV - string manipulation (jq, bash, awk, sed, etc.) - json

Question

I'm in a dire need of help for a script to basically convert JSON text to CSV text in an attempt to copy users from one AWS Cognito userpool to another.
The export JSON looks like this:
{
"Users": [
{
"Username": "user.name",
"Attributes": [
{
"Name": "sub",
"Value": "some-value"
},
{
"Name": "email_verified",
"Value": "true"
},
{
"Name": "custom:jobtitle",
"Value": Director"
},
{
"Name": "custom:user_id",
"Value": "38"
},
{
"Name": "email",
"Value": "foo.bar#email.com"
}
],
"UserCreateDate": some-value,
"UserLastModifiedDate": some-value,
"Enabled": some-value,
"UserStatus": "some-value"
}
[more lines down here]...
] }
Then the CSV file would contain these lines:
,,,,,,,,,foo.bar#email.com,TRUE,,,,,,FALSE,,,Director,,38,FALSE,foo.bar
[more lines down here]...
So, the variables would be like this for JSON:
{
"Users": [
{
"Username": "%USERNAME%",
"Attributes": [
{
"Name": "sub",
"Value": "some-value"
},
{
"Name": "email_verified",
"Value": "true"
},
{
"Name": "custom:jobtitle",
"Value": %JOB_TITLE%"
},
{
"Name": "custom:user_id",
"Value": "%USER_ID%"
},
{
"Name": "email",
"Value": %EMAIL%"
}
],
"UserCreateDate": some-value,
"UserLastModifiedDate": some-value,
"Enabled": some-value,
"UserStatus": "some-value"
}
...
]
}
And like this for CSV:
,,,,,,,,,%EMAIL%,TRUE,,,,,,FALSE,,,%JOB_TITLE%,,%USER_ID%,FALSE,%USERNAME%
where %EMAIL%, %JOB_TITLE%, %USER_ID%, and %USERNAME% are variables, everything else should be just string.
Appreciate your help in advanced guys.

Answer 1

Consider first this filter:
.Users[].Attributes
| map(select(.Name | . == "custom:jobtitle" or . == "custom:user_id" or . == "email") )
| from_entries
| [ .email, .["custom:jobtitle"], .["custom:user_id"] ]
| #csv
The trick used here is the use of from_entries to convert the array of Name/Value pairs to an object with the Names as keys.
Assuming valid JSON input along the lines shown in the Q, invoking jq with the -r option would yield:
"foo.bar#email.com","Director","38"
Unfortunately the precise requirements are not so clear to me, but you should be able to adapt the above in accordance with your needs.