Convert data from CSV to JSON with grouping - json

Question

Example csv data (top row is column header followed by three data lines);
floor,room,note1,note2,note3
floor1,room1,2people
floor2,room4,6people,projector
floor6,room5,20people,projector,phone
I need the output in json, but grouped by floor, like this;
floor
room
note1
note2
note3
room
note1
note2
note3
floor
room
note1
note2
note3
room
note1
note2
note3
So all floor1 rooms are in their own json grouping, then floor2 rooms etc.
Please could someone point me in the right direction in terms of which tools to look at and any specific functions e.g. jq + categories. I've done some searching already and got muddled up between lots of different posts relating to csvtojson, jq and some python scripts. Ideally I would like to include the solution in a shell script rather than a separate program/language (I have sys admin experience but not a programmer).
Many thanks

Answer 1

Perhaps this can get you started.
Use a programming language like Python to convert the CSV data into a dictionary data structure by splitting on the commas, and use the JSON library to dump your dictionary out as JSON.
I have assumed that actually you expect to have more than one room per floor and thus I took the liberty to adjust your input data a little.
import json
csv = """floor1,room1,note1,note2,note3
floor1,room2,2people
floor1,room3,3people
floor2,room4,6people,projector
floor2,room5,3people,projector
floor3,room6,1person
"""
response = {}
for line in csv.splitlines():
fields = line.split(",")
floor, room, data = fields[0], fields[1], fields[2:]
if floor not in response:
response[floor] = {}
response[floor][room] = data
print json.dumps(response)
If you then run that script and pipe it into jq (where JQ is just used for pretty-printing the output on your screen ; it is not really required) you will see:
$ python test.py | jq .
{
"floor1": {
"room2": [
"2people"
],
"room3": [
"3people"
],
"room1": [
"note1",
"note2",
"note3"
]
},
"floor2": {
"room4": [
"6people",
"projector"
],
"room5": [
"3people",
"projector"
]
},
"floor3": {
"room6": [
"1person"
]
}
}