# Support examples using AWS CLI with Bash script
<a name="bash_support_code_examples"></a>

The following code examples show you how to perform actions and implement common scenarios by using the AWS Command Line Interface with Bash script with Support.

*Scenarios* are code examples that show you how to accomplish specific tasks by calling multiple functions within a service or combined with other AWS services.

Each example includes a link to the complete source code, where you can find instructions on how to set up and run the code in context.

**Topics**
+ [Scenarios](#scenarios)

## Scenarios
<a name="scenarios"></a>

### Getting started with Support
<a name="support_GettingStarted_062_bash_topic"></a>

The following code example shows how to:
+ Check available services and severity levels
+ Create a support case
+ Add communications to a case

**AWS CLI with Bash script**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [Sample developer tutorials](https://github.com/aws-samples/sample-developer-tutorials/tree/main/tuts/062-aws-support-gs) repository. 

```
#!/bin/bash

# AWS Support CLI Tutorial Script
# This script demonstrates how to use AWS Support API through AWS CLI

set -euo pipefail

# Security: Validate script location and permissions
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
readonly SCRIPT_DIR

# Security: Use secure temporary directory
readonly TEMP_DIR="$(mktemp -d)" || { echo "Failed to create temp directory"; exit 1; }
trap "rm -rf '$TEMP_DIR'" EXIT

# Set up logging with secure permissions
LOG_FILE="${TEMP_DIR}/aws-support-tutorial.log"
touch "$LOG_FILE"
chmod 600 "$LOG_FILE"

# Security: Validate AWS CLI is available
if ! command -v aws &> /dev/null; then
    echo "ERROR: AWS CLI is not installed or not in PATH" >&2
    exit 1
fi

# Security: Check AWS credentials are configured
if ! aws sts get-caller-identity &> /dev/null; then
    echo "ERROR: AWS credentials are not properly configured" >&2
    exit 1
fi

{
    echo "Starting AWS Support Tutorial at $(date)"
    echo "Script: $0"
    echo "User: $(whoami)"
    echo "---"
} >> "$LOG_FILE"

# Function to log commands and their outputs securely
log_cmd() {
    local cmd="$1"
    echo "$(date): Running command" >> "$LOG_FILE"
    # Don't echo the actual command to prevent credential leakage
    eval "$cmd" 2>&1 | tee -a "$LOG_FILE"
    return ${PIPESTATUS[0]}
}

# Function to check for errors in command output
check_error() {
    local cmd_output="$1"
    local cmd_status="$2"
    local error_msg="$3"
    local is_fatal="${4:-true}"
    
    if [[ $cmd_status -ne 0 || "$cmd_output" =~ [Ee][Rr][Rr][Oo][Rr] ]]; then
        echo "ERROR: $error_msg" | tee -a "$LOG_FILE"
        echo "Command returned status: $cmd_status" >> "$LOG_FILE"
        
        # Check for subscription error
        if [[ "$cmd_output" =~ "SubscriptionRequiredException" ]]; then
            {
                echo ""
                echo "===================================================="
                echo "IMPORTANT: This account does not have the required AWS Support plan."
                echo "You need a Business, Enterprise On-Ramp, or Enterprise Support plan"
                echo "to use the AWS Support API."
                echo ""
                echo "This script will now demonstrate the commands that would be run"
                echo "if you had the appropriate support plan, but will not execute them."
                echo "===================================================="
            } | tee -a "$LOG_FILE"
            
            DEMO_MODE=true
            return 0
        fi
        
        if [[ "$is_fatal" == "true" ]]; then
            cleanup_resources
            exit 1
        fi
    fi
}

# Function to clean up resources
cleanup_resources() {
    echo "Cleaning up resources..." | tee -a "$LOG_FILE"
    echo "No persistent resources were created that need cleanup." | tee -a "$LOG_FILE"
}

# Function to run a command in demo mode
demo_cmd() {
    local cmd="$1"
    local description="$2"
    
    {
        echo ""
        echo "DEMO: $description"
        echo "Command that would be executed:"
        echo "  [Command hidden for security]"
        echo ""
    } | tee -a "$LOG_FILE"
}

# Function to safely extract JSON values
extract_json_value() {
    local json_output="$1"
    local key="$2"
    
    echo "$json_output" | grep -o "\"$key\": \"[^\"]*\"" | head -1 | cut -d'"' -f4 || echo ""
}

# Array to track created resources
declare -a CREATED_RESOURCES

# Initialize demo mode flag
DEMO_MODE=false

# Security: Validate input parameters
if [[ $# -gt 0 ]]; then
    echo "ERROR: This script does not accept parameters" >&2
    exit 1
fi

{
    echo "==================================================="
    echo "AWS Support CLI Tutorial"
    echo "==================================================="
    echo "This script demonstrates how to use AWS Support API"
    echo "Note: You must have a Business, Enterprise On-Ramp,"
    echo "or Enterprise Support plan to use the AWS Support API."
    echo "==================================================="
    echo ""
} | tee -a "$LOG_FILE"

# Step 1: Check available services
echo "Step 1: Checking available AWS Support services..." | tee -a "$LOG_FILE"
SERVICES_OUTPUT=$(log_cmd "aws support describe-services --language en" 2>&1) || SERVICES_OUTPUT=""
check_error "$SERVICES_OUTPUT" $? "Failed to retrieve AWS Support services"

# If we're in demo mode, set default values
if [[ "$DEMO_MODE" == "true" ]]; then
    SERVICE_CODE="general-info"
    echo "Using demo service code: $SERVICE_CODE" | tee -a "$LOG_FILE"
else
    # Extract a service code for demonstration using safer method
    SERVICE_CODE=$(extract_json_value "$SERVICES_OUTPUT" "code") || SERVICE_CODE=""
    if [[ -z "$SERVICE_CODE" ]]; then
        SERVICE_CODE="general-info"
        echo "Using default service code: $SERVICE_CODE" | tee -a "$LOG_FILE"
    else
        echo "Found service code: $SERVICE_CODE" | tee -a "$LOG_FILE"
    fi
fi

# Step 2: Check available severity levels
echo "Step 2: Checking available severity levels..." | tee -a "$LOG_FILE"
if [[ "$DEMO_MODE" == "true" ]]; then
    demo_cmd "aws support describe-severity-levels --language en" "Check available severity levels"
    SEVERITY_CODE="low"
    echo "Using demo severity code: $SEVERITY_CODE" | tee -a "$LOG_FILE"
else
    SEVERITY_OUTPUT=$(log_cmd "aws support describe-severity-levels --language en" 2>&1) || SEVERITY_OUTPUT=""
    check_error "$SEVERITY_OUTPUT" $? "Failed to retrieve severity levels"

    SEVERITY_CODE=$(extract_json_value "$SEVERITY_OUTPUT" "code") || SEVERITY_CODE=""
    if [[ -z "$SEVERITY_CODE" ]]; then
        SEVERITY_CODE="low"
        echo "Using default severity code: $SEVERITY_CODE" | tee -a "$LOG_FILE"
    else
        echo "Found severity code: $SEVERITY_CODE" | tee -a "$LOG_FILE"
    fi
fi

# Step 3: Create a test support case
{
    echo ""
    echo "==================================================="
    echo "SUPPORT CASE CREATION"
    echo "==================================================="
} | tee -a "$LOG_FILE"

if [[ "$DEMO_MODE" == "true" ]]; then
    {
        echo "DEMO MODE: The following steps would create and manage a support case"
        echo "if you had a Business, Enterprise On-Ramp, or Enterprise Support plan."
        echo ""
    } | tee -a "$LOG_FILE"
    
    USER_EMAIL="example@example.com"
    
    demo_cmd "aws support create-case" "Create a support case"
    
    CASE_ID="case-12345678910-2013-c4c1d2bf33c5cf47"
    echo "Demo case ID: $CASE_ID" | tee -a "$LOG_FILE"
    
    demo_cmd "aws support describe-cases" "List support cases"
    demo_cmd "aws support add-communication-to-case" "Add communication to case"
    demo_cmd "aws support describe-communications" "View case communications"
    demo_cmd "aws support resolve-case" "Resolve the support case"
    
else
    echo "Creating a test support case..." | tee -a "$LOG_FILE"
    
    USER_EMAIL="example@example.com"
    CC_EMAIL_PARAM="--cc-email-addresses $USER_EMAIL"
    
    # Create the case
    CASE_OUTPUT=$(log_cmd "aws support create-case --subject 'AWS CLI Tutorial Test Case' --service-code '$SERVICE_CODE' --category-code 'using-aws' --communication-body 'This is a test case created as part of an AWS CLI tutorial.' --severity-code '$SEVERITY_CODE' --language 'en' $CC_EMAIL_PARAM" 2>&1) || CASE_OUTPUT=""
    
    check_error "$CASE_OUTPUT" $? "Failed to create support case"
    
    # Extract the case ID safely
    CASE_ID=$(extract_json_value "$CASE_OUTPUT" "caseId") || CASE_ID=""
    
    if [[ -n "$CASE_ID" ]]; then
        echo "Successfully created support case with ID: $CASE_ID" | tee -a "$LOG_FILE"
        CREATED_RESOURCES+=("Support Case: $CASE_ID")
        
        # Step 4: List the case we just created
        echo "" | tee -a "$LOG_FILE"
        echo "Step 4: Listing the support case we just created..." | tee -a "$LOG_FILE"
        CASES_OUTPUT=$(log_cmd "aws support describe-cases --case-id-list '$CASE_ID' --include-resolved-cases false --language 'en'" 2>&1) || CASES_OUTPUT=""
        
        check_error "$CASES_OUTPUT" $? "Failed to retrieve case details"
        
        # Step 5: Add a communication to the case
        echo "" | tee -a "$LOG_FILE"
        echo "Step 5: Adding a communication to the support case..." | tee -a "$LOG_FILE"
        COMM_OUTPUT=$(log_cmd "aws support add-communication-to-case --case-id '$CASE_ID' --communication-body 'This is an additional communication for the test case.' $CC_EMAIL_PARAM" 2>&1) || COMM_OUTPUT=""
        
        check_error "$COMM_OUTPUT" $? "Failed to add communication to case"
        
        # Step 6: View communications for the case
        echo "" | tee -a "$LOG_FILE"
        echo "Step 6: Viewing communications for the support case..." | tee -a "$LOG_FILE"
        COMMS_OUTPUT=$(log_cmd "aws support describe-communications --case-id '$CASE_ID' --language 'en'" 2>&1) || COMMS_OUTPUT=""
        
        check_error "$COMMS_OUTPUT" $? "Failed to retrieve case communications"
        
        # Step 7: Resolve the case
        {
            echo ""
            echo "==================================================="
            echo "CASE RESOLUTION"
            echo "==================================================="
            echo "Resolving the support case..."
        } | tee -a "$LOG_FILE"
        
        RESOLVE_OUTPUT=$(log_cmd "aws support resolve-case --case-id '$CASE_ID'" 2>&1) || RESOLVE_OUTPUT=""
        
        check_error "$RESOLVE_OUTPUT" $? "Failed to resolve case"
        echo "Successfully resolved support case: $CASE_ID" | tee -a "$LOG_FILE"
    else
        echo "Could not extract case ID from the response." | tee -a "$LOG_FILE"
    fi
fi

# Display summary of created resources
{
    echo ""
    echo "==================================================="
    echo "TUTORIAL SUMMARY"
    echo "==================================================="
} | tee -a "$LOG_FILE"

if [[ "$DEMO_MODE" == "true" ]]; then
    {
        echo "This was a demonstration in DEMO MODE."
        echo "No actual AWS Support cases were created."
        echo "To use the AWS Support API, you need a Business, Enterprise On-Ramp,"
        echo "or Enterprise Support plan."
    } | tee -a "$LOG_FILE"
else
    {
        echo "Resources created during this tutorial:"
        if [[ ${#CREATED_RESOURCES[@]} -eq 0 ]]; then
            echo "No resources were created."
        else
            for resource in "${CREATED_RESOURCES[@]+"${CREATED_RESOURCES[@]}"}"; do
                echo "- $resource"
            done
        fi
    } | tee -a "$LOG_FILE"
fi

{
    echo ""
    echo "Tutorial completed successfully!"
    echo "Log file: $LOG_FILE"
    echo "==================================================="
} | tee -a "$LOG_FILE"

# Display log file path to user
echo "Log file: $LOG_FILE"
```
+ For API details, see the following topics in *AWS CLI Command Reference*.
  + [AddCommunicationToCase](https://docs.aws.amazon.com/goto/aws-cli/support-2013-04-15/AddCommunicationToCase)
  + [CreateCase](https://docs.aws.amazon.com/goto/aws-cli/support-2013-04-15/CreateCase)
  + [DescribeCases](https://docs.aws.amazon.com/goto/aws-cli/support-2013-04-15/DescribeCases)
  + [DescribeCommunications](https://docs.aws.amazon.com/goto/aws-cli/support-2013-04-15/DescribeCommunications)
  + [DescribeServices](https://docs.aws.amazon.com/goto/aws-cli/support-2013-04-15/DescribeServices)
  + [DescribeSeverityLevels](https://docs.aws.amazon.com/goto/aws-cli/support-2013-04-15/DescribeSeverityLevels)
  + [ResolveCase](https://docs.aws.amazon.com/goto/aws-cli/support-2013-04-15/ResolveCase)