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feat: Add binary representation for resource existence check
- Updated detectIncompleteState function to return a binary value indicating the existence of instance, security group, and key pair. - Binary format: Bit 2 (instance), Bit 1 (security group), Bit 0 (key pair). - Outputs binary state and interprets which resources exist or are missing. - Added logic to handle binary state representation and provide detailed feedback.
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‎src/aws/dependencies/detectIncompleteState.sh‎

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#!/bin/bash
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# Function to describe an EC2 instance by its Name tag
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# Accepts one argument: instanceName
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describeInstanceByName() {
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local instanceName=$1
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# Check if instanceName was provided
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if [ -z "$instanceName" ]; then
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echo "Error: Please provide an instance name."
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return 1
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fi
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# Run the AWS CLI command with the provided instanceName and capture the result in JSON format
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local result=$(aws ec2 describe-instances \
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--filters "Name=tag:Name,Values=$instanceName" \
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--query 'Reservations[*].Instances[*].{Instance:InstanceId,State:State.Name,PublicIP:PublicIpAddress}' \
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--output json)
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# Check if result is empty, meaning no instances found
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if [ -z "$result" ] || [ "$result" = "[]" ]; then
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echo "No instances found with Name tag: $instanceName"
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return 1
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fi
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# Use jq to parse and display InstanceId, State, and PublicIP
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echo "$result" | jq -r '.[] | .[] | "\nInstanceId: \(.Instance)\nState: \(.State)\nPublicIP: \(.PublicIP // "N/A")\n"'
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return 0
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}
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# Function to check if a security group exists by its name
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# Accepts one argument: groupName
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checkSecurityGroupExists() {
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local groupName=$1
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# Describe security groups filtered by group name
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local result=$(aws ec2 describe-security-groups --group-names "$groupName" 2>&1)
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# Check if the result contains an error (security group not found)
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if echo "$result" | grep -q "InvalidGroup.NotFound"; then
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echo "Security group '$groupName' does not exist."
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return 1
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else
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echo "Security group '$groupName' exists."
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return 0
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fi
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}
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# Function to check if a key pair exists by its name
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# Accepts one argument: keyName
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checkKeyPairExists() {
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local keyName=$1
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# Describe key pairs filtered by key name
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local result=$(aws ec2 describe-key-pairs --key-name "$keyName" 2>&1)
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# Check if the result contains an error (key pair not found)
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if echo "$result" | grep -q "InvalidKeyPair.NotFound"; then
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echo "Key pair '$keyName' does not exist."
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return 1
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else
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echo "Key pair '$keyName' exists."
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return 0
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fi
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}
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# Parent function to detect the state of the instance, security group, and key pair
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# Accepts three arguments:
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# $1: instanceName (for describeInstanceByName)
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# $2: groupName (for checkSecurityGroupExists)
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# $3: keyName (for checkKeyPairExists)
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# Returns a binary value representing the state:
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# - Bit 2 (100): Instance exists
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# - Bit 1 (010): Security group exists
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# - Bit 0 (001): Key pair exists
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detectIncompleteState() {
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local instanceName=$1
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local groupName=$2
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local keyName=$3
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# Initialize existence status variables (0 = exists, 1 = doesn't exist)
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local keyPairExists=0
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local securityGroupExists=0
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local instanceExists=0
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# Check if the instance exists
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describeInstanceByName "$instanceName"
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instanceExists=$? # 0 if exists, 1 if doesn't exist
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# Check if the security group exists
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checkSecurityGroupExists "$groupName"
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securityGroupExists=$? # 0 if exists, 1 if doesn't exist
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# Check if the key pair exists
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checkKeyPairExists "$keyName"
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keyPairExists=$? # 0 if exists, 1 if doesn't exist
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# Construct a binary value based on the resource existence statuses
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# Bit 2 -> instanceExists (shift left by 2 positions)
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# Bit 1 -> securityGroupExists (shift left by 1 position)
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# Bit 0 -> keyPairExists
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local binaryState=$(((instanceExists << 2) | (securityGroupExists << 1) | keyPairExists))
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# Output the binary value (as a decimal number)
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echo "Binary state (in decimal): $binaryState"
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# Return the binary state (as an integer)
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return $binaryState
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}
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# Example usage:
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# To use the parent function `detectIncompleteState`, provide three arguments:
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# 1. The name of the instance to check
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# 2. The name of the security group to check
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# 3. The name of the key pair to check
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#
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# Example:
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# detectIncompleteState "luftballon" "luftballons-sg" "luftballon"
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detectIncompleteState "luftballon" "luftballons-sg" "luftballon"
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binaryState=$?
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# Output the binary state in binary format for easier understanding
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echo "Binary state (in binary): $(echo "obase=2; $binaryState" | bc)"
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# Example: Interpret the binary state
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if [[ $binaryState -eq 0 ]]; then
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echo "All resources exist."
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else
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# Analyze each bit
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if ((binaryState & 4)); then
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echo "Instance does not exist."
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fi
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if ((binaryState & 2)); then
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echo "Security Group does not exist."
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fi
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if ((binaryState & 1)); then
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echo "Key Pair does not exist."
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fi
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fi
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# Example usage:
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# To use the parent function `detectIncompleteState`, provide three arguments:
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# 1. The name of the instance to check
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# 2. The name of the security group to check
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# 3. The name of the key pair to check
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#
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# Example:
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# detectIncompleteState "my-instance-name" "my-security-group-name" "my-key-pair-name"
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detectIncompleteState "luftballon" "luftballons-sg" "luftballon"
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echo $?

‎src/aws/down.sh‎

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#BASE=$HOME
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BASE=/home/pi
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function down(){
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function down() {
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balloonName=$(setBalloonName "$1")
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keyName=$(getValueByAttribute $balloonName key)
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groupName=$(getValueByAttribute $balloonName groupName)
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detectIncompleteState "luftballon" "luftballons-sg" "luftballon"
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if ! isBalloonNameValid "$balloonName"; then
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echo "Please provide a valid balloon name"
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exit 1
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echo "Please provide a valid balloon name"
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exit 1
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fi
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instanceId=$(getValueByAttribute $balloonName instanceId)
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if [ "$instanceId" = "null" ]; then
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echo "$balloonName does not exist"
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exit 0
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echo "$balloonName does not exist"
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exit 0
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fi
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keyName=$(getValueByAttribute $balloonName key)
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groupName=$(getValueByAttribute $balloonName groupName)
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storePortArrayString $groupName tcp $balloonName
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storePortArrayString $groupName udp $balloonName
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updateSshtunnelConfig $balloonName
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echo $instanceId
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aws ec2 terminate-instances --instance-ids $instanceId
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aws ec2 terminate-instances --instance-ids $instanceId
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echo "ec2 instance delete"
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echo $keyName

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