saman.sh

#!/bin/bash -x

# Global variables
taskFile="/tmp/.task.txt"

function taskAdd {
    echo "Task Add"
    checkTaskfile
    # Check if task name is not empty
    checkString=$(echo $@ | sed 's/add//g')
    if [[ "$checkString" == "" ]]; then
        echo "[Error] Task name is missing"
        exit 1
    fi
    if grep -iq "(important)" <<< $@ ; then
        taskPriority="M"
        taskString=$(echo $@ | sed 's/ (important)/,M/g'| sed 's/^add //g')
    fi
    if grep -iq "(very important)" <<< $@ ; then
        taskPriority="H"
        taskString=$(echo $@ | sed 's/ (very important)/,H/g' | sed 's/^add //g')
    fi
    # If priority has not been set, then use default priority
    if [ -z ${taskPriority+x} ]; then
        taskPriority="L"
        taskString=$(echo $@ | sed 's/$/,L/' | sed 's/^add //g')
    fi
    # Check if task duplicated or not
    if grep -iq "$taskString" $taskFile; then
        echo "[Error] Task duplicated."
        exit 1
    fi
    echo "$taskString" >> $taskFile
    taskId=$(grep -n "$taskString" "$taskFile" | cut -d":" -f1)
    echo "Added task $taskId with priority $taskPriority"
    
}

function taskList {
    echo "Task List"
    checkTaskfile
    taskCount=$(wc -l $taskFile | awk {'print $1'})
    for (( i = 1 ; i <= $taskCount ; i++ ));
    do
        task=$(head -n$i $taskFile | tail -n1)
        priority=$(echo $task | cut -d"," -f2)
        if [[ "$priority" == "M" ]]; then
            prioritySymbol="***    "
        fi
        if [[ "$priority" == "H" ]]; then
            prioritySymbol="****** "
        fi
        if [[ "$priority" == "L" ]]; then
            prioritySymbol="*      "
        fi
        taskString=$(echo $task | cut -d"," -f1)
        echo "$i $prioritySymbol" $taskString
    done

}
function taskDone {
    echo "Task Done"
    checkTaskfile
    # Check ID Provided
    taskId=$(echo $@ | sed 's/done //g')
    if grep -q "^[0-9]" <<< $taskId; then
        echo "[Error] Task ID is invalid"
        exit 1
    fi
    taskString=$(head -n $taskId $taskFile | tail -n1)
    if [[ "$taskString" == "" ]]; then
        echo "[Error] Task ID not found"
        exit 1
    fi
    sed -i "/$taskString/d" $taskFile
    echo "Completed task $taskId: $taskString"

    
}



function check {
    if [[ "$1" == "" ]]; then
        echo "[Error] This command needs an argument"
        exit 1
    fi
    case $1 in
    
      add)
        taskAdd $@
       ;;
    
      list)
        taskList
       ;;
    
      done)
       taskDone
       ;;
    
      *)
        echo "[Error] Invalid command"
       ;;
    esac
}

function checkTaskfile {
    if [[ ! -f "$taskFile" ]]; then
        touch $taskFile
    fi
}

function printPriority {
    echo "Print priority"
}

check $@