Remove key if the value matches pattern - json

Question

I have following json and want to remove keys if the "value" matches specific pattern. Name of the keys are not fixed or pre-determined.
{
"resources": [{
"tags": null,
"properties": {
"customerId": "1234-cbd9-42bc-9193-f6432a6ef0d4",
"provisioningState": "Succeeded",
"sku": {
"maxCapacityReservationLevel": 3000,
"lastSkuUpdate": "Fri, 19 Mar 2021 16:38:12 GMT"
},
"createdDate": "Fri, 19 Mar 2021 16:38:12 GMT",
"modifiedDate": "Fri, 19 Mar 2021 17:27:54 GMT",
"status": {
"events": [{
"count": 1,
"firstTimestamp": "2021-03-19T16:40:59Z",
"lastTimestamp": "2021-03-19T16:40:59Z",
"name": "Pulling",
"type": "Normal"
}]
}
}
}]
}
Expected output
After removal of the following keys as values matched timestamp format.
lastSkuUpdate
createdDate
modifiedDate
firstTimestamp
lastTimestamp
{
"resources": [{
"tags": null,
"properties": {
"customerId": "1234-cbd9-42bc-9193-f6432a6ef0d4",
"provisioningState": "Succeeded",
"sku": {
"maxCapacityReservationLevel": 3000,
},
"status": {
"events": [{
"count": 1,
"name": "Pulling",
"type": "Normal"
}]
}
}
}]
}

Answer 1

"(?x:
^
(?: \\d{4}-\\d{2}-\\d{2}T
| \\w{3},[ ][\\d ]\\d[ ]\\w{3}[ ]\\d{4}
)
)" as $date_pattern |
( .. | select(type == "object") ) |= del(.[
. as $o |
keys_unsorted[] |
select( $o[.] | type == "string" and test($date_pattern) )
])
jqplay
Adjust the pattern to your liking.

Answer 2

A straightforward way to delete key-value pairs from a JSON object is using with_entries, e.g. like so:
def matches:
type == "string"
and test("^[1-9]\\d{3}-\\d+-\\d|[1-9]\\d{3} \\d{2}:\\d{2}:\\d{2}");
walk(if type=="object"
then with_entries(if .value|matches then empty else . end)
else . end)
You may of course wish to adjust def matches: according to your requirements, or to shorten the filter-argument of with_entries to:
select(.value|matches|not)

Answer 3

Here's a superficially complicated but very efficient and actually quite simple solution. It uses jq's streaming parser and would thus be especially suitable for very large JSON input(s). Of course the matches filter as defined here should be taken as illustrative rather than definitive.
jq --stream -n '
def matches:
type == "string"
and test("^[1-9]\\d{3}-\\d+-\\d|[1-9]\\d{3} \\d{2}:\\d{2}:\\d{2}");
fromstream(inputs
| select((length==2
and (.[0][-1]|type)=="string"
and (.[-1]|matches))
| not) )
' input.json