how to query an array to see if a value exists, and if it does do something

So I have this part of a script that creates associative arrays based on output from a yum repolist all command. The script reads line by line and then adds the information into the array. But I have more information that I would like to be added as well. I wrote a script that compares the epoch of when repos are updated from one enviroment to another. dev to test, test to prod. What I would like, is for the array portion of the script to be able to find the name of the repo, typically held in Repo-id field, and then pull the information in the first part of the script to be input as array items.

Here is what I have so far:

# first sed replaces any blank lines with --
json=$(yum -v repolist all | grep -B2 -A6 "enabled" | sed 's/^$/--/')

# declare a new array to keep things in
declare -A REPO_ARRAY

# read lines and add them to the array if they match
while read line
do
case "${line}" in
    *Repo-name* )
        line=$(echo "${line}" | sed -e 's/^[^:]*://' | sed -e 's,^ *,,')
        REPO_ARRAY[repo_name]="${line}"
    ;;
    *Repo-id* )
        line=$(echo "${line}" | sed -e 's/^[^:]*://' | sed -e 's,^ *,,')
        REPO_ARRAY[repo_id]="${line}"
    ;;
    *Repo-size* )
        line=$(echo "${line}" | sed -e 's/^[^:]*://' | sed -e 's,^ *,,')
        REPO_ARRAY[repo_size]="${line}"
    ;;
    *Repo-updated* )
        line=$(echo "${line}" | sed -e 's/^[^:]*://' | sed -e 's,^ *,,')
        REPO_ARRAY[repo_updated]="${line}"
    ;;
    *Repo-pkgs* )
        line=$(echo "${line}" | sed -e 's/^[^:]*://' | sed -e 's,^ *,,')
        REPO_ARRAY[repo_pkgs]="${line}"
    ;;
    *Repo-expire* )
        line=$(echo "${line}" | sed -e 's/^[^:]*://' | sed -e 's,^ *,,')
        REPO_ARRAY[repo_expire]="${line}"
    ;;
    *Repo-revision* )
        line=$(echo "${line}" | sed -e 's/^[^:]*://' | sed -e 's,^ *,,')
        REPO_ARRAY[repo_revision]="${line}"
    ;;
    *Repo-baseurl* )
        line=$(echo "${line}" | sed -e 's/^[^:]*://' | sed -e 's,^ *,,')
        REPO_ARRAY[repo_url]="${line}"
    ;;
    # if we see -- that means the end of the repo
    -- )
        for i in "${!REPO_ARRAY[@]}"
        if
            grep -q ius <<< "${REPO_ARRAY[$i]}"
        then
            REPO_ARRAY[repo_sync_dev\/test]=${iustest_diff}
            REPO_ARRAY[repo_sync_test\/prod]=${iusprod_diff}
        fi

        for i in "${!REPO_ARRAY[@]}"
        do
            echo "$i"
            echo "${REPO_ARRAY[$i]}"
        done | jq -n -R 'reduce inputs as $i ({}; . + { ($i): (input|(tonumber? // .)) })'
esac
done <<< "$json"

And I am thinking this would be my value search/input to array but it doesn't seem to be working

if
  grep -q ius "${REPO_ARRAY[$i]}";
then
  REPO_ARRAY[repo_sync_dev\/test]=${foo}
  REPO_ARRAY[repo_sync_test\/prod]=${bar}
fi

I've tried adding it to the ending echo for loop. To no avail. Not even sure if I am doing this right either.

EDIT:

So it looks like the key's/values are getting added to the output. WHICH IS GOOD! But it's adding to all the enteries. W hich isn't great.

{
  "repo_expire": "21,600 second(s) (last: Mon Nov 12 05:44:16 2018)",
  "repo_url": "http://...",
  "repo_id": "base",
  "repo_pkgs": "6,713",
  "repo_sync_dev/test": 6,
  "repo_revision": 1530286202,
  "repo_name": "CentOS-6 - Base",
  "repo_size": "5.5 G",
  "repo_updated": "Fri Jun 29 08:37:23 2018",
  "repo_sync_test/prod": 851 
}