#!/bin/bash
#
TGSCT=0
LEVEL=0
URL=""

declare -A RP
RP["a"]=XYZ.com                                         # set up replacement URLs
RP["b"]=YZX.org
RP["c"]=ZXY.biz

while IFS="" read LN                                    # don't destroy original line
 do     IFS=": " read P1 P2 R <<< $LN                   # get elements from line; use bashs "here string"
        [ "$P1" != "${P1/appMap}" ] && TGSCT=1          # test for the right target section ("appMap")

        OLDLVL=$LEVEL                                   # save nesting level
        T1=${LN//\{}                                    # compute actual nesting level (based on braces)
        T2=${LN//\}}
        LEVEL=$((LEVEL + ${#T2} - ${#T1}))              # which is count opening braces minus count closing braces

        [ "$TGSCT" -eq 0 ] &&   { echo "$LN"
                                  continue
                                }                       # not in right section: print and leave

        [ "$OLDLVL" -eq 2 ] &&  { URL=${P1//\"}         # test for nesting level (URL is 2), compute URL w/o double quotes
                                  TMP="$LN"             # save URL in variable and total line in temp. var
                                }

        [ "$P1" != "${P1/name}" ] && {  NM=${P2//\"}    # test for "name" tag, compute name value w/o double quotes
                                        LN="${TMP/$URL/${RP[$NM]}}"$'\n'"$LN"
                                                        # replace old URL with new URL
                                        URL=""; }       # empty URL variable

        [ -z "$URL" ] && echo "$LN"                     # print only if no URL has been intercepted

        [ "$LEVEL" -eq 0 ] && TGSCT=0                   # zero nesting level means target section left

   done < file                                          # read from json file