bash execute functions based on certain word in arguments - bash

Question

i have the following bash script contains multiple functions
#!/usr/bin/bash
#checks if the arguments is directory and extract the domain name from it
if [[ -d "$1" ]]; then
domain=$(echo "$1" | grep -iEo '[[:alnum:]-]+\.[a-z]+')
WORKING_DIR="$1"
else
domain="$1"
echo "it is domain name"
fi
example_fun1(){
ping -c 4 $domain
}
example_fun2(){
nslookup $domain
}
for x in "$#" ;do
example_fun1 $x
example_fun2 $x
done
and run as following
./script.sh ./pathtofolder/example.com/ ./pathtofolder/test.com/
Or
./script.sh example.com test.com
and working probably BUT i need to add more feature which is check if certain word based in arguments like fun1 it will execute function example_fun1 only
desired execution
./script.sh fun1 ./pathtofolder/example.com/ ./pathtofolder/test.com/
OR
./script.sh fun1 example.com test.com
Thanks

Answer 1

Try the following
#!/usr/bin/bash
function=""
if [[ $( echo $1 | grep fun1 ) ]]
then
function="example_fun1"
shift
elif [[ $( echo $1 | grep fun2 ) ]]
then
function="example_fun2"
shift
fi
#checks if the arguments is directory and extract the domain name from it
example_fun1(){
ping -c 4 $domain
}
example_fun2(){
nslookup $domain
}
if [[ "$function" != "" ]]
then
for input in "$#"; do
if [[ -d "$1" ]]; then
domain=$(echo "$1" | grep -iEo '[[:alnum:]-]+\.[a-z]+')
WORKING_DIR="$1"
else
domain="$1"
echo "it is domain name"
fi
"$function"
shift
done
else
for input in "$#"; do
if [[ -d "$1" ]]; then
domain=$(echo "$1" | grep -iEo '[[:alnum:]-]+\.[a-z]+')
WORKING_DIR="$1"
else
domain="$1"
echo "it is domain name"
fi
example_fun1
example_fun2
shift
done
fi
This way you can pass fun1 and execute only fun1
Or if you don't pass any of these for example both of them will be executed

Answer 2

Assign the first parameter to a variable, then use that when calling the function.
func="example_$1"
shift
for x in "$#"; do
"$func" "$x"
done
And your functions need to use their parameters, not a variable that's set in the main script:
example_fun1(){
ping -c 4 "$1"
}
example_fun2(){
nslookup "$1"
}