insert_data..sh

#! /bin/bash

if [[ $1 == "test" ]]
then
  PSQL="psql --username=postgres --dbname=worldcuptest -t --no-align -c"
else
  PSQL="psql --username=freecodecamp --dbname=worldcup -t --no-align -c"
fi

# Do not change code above this line. Use the PSQL variable above to query your database.

cat games.csv | while IFS="," read YEAR ROUND WINNER OPPONENT WINNER_GOALS OPPONENT_GOALS
do
if [[ $WINNER != "winner" && $OPPONENT != "opponent" ]]
  then
  #get teams_id

  WINNER_ID=$($PSQL "SELECT team_id FROM teams WHERE name='$WINNER'")
  OPPONENT_ID=$($PSQL "SELECT team_id FROM teams WHERE name='$OPPONENT'")
  
  # if not found winner
    if [[ -z $WINNER_ID ]]
    then
      # insert winner
      INSERT_WINNER_RESULT=$($PSQL "INSERT INTO teams(name) VALUES('$WINNER')")
      # it was succesfull
      if [[ INSERT_WINNER_RESULT == "INSERT 0 1" ]]
      then
       echo "Inserted into teams, $WINNER"
      fi
  
      #get new WINNER_ID
      WINNER_ID=$($PSQL "SELECT team_id FROM teams WHERE name='$WINNER'")
    fi
  
    # if not found opponent
    if [[ -z $OPPONENT_ID ]]
    then
      # insert opponent
      INSERT_OPPONENT_RESULT=$($PSQL "INSERT INTO teams(name) VALUES('$OPPONENT')")
      # it was succesfull
      if [[ INSERT_OPPONENT_RESULT == "INSERT 0 1" ]]
      then
       echo "Inserted into teams, $OPPONENT"
      fi
  
      #get new OPPONENT_ID
      OPPONENT_ID=$($PSQL "SELECT team_id FROM teams WHERE name='$OPPONENT'")
    fi

    # insert data into games

    INSERT_GAMES_RESULT=$($PSQL "INSERT INTO games(year, round, winner_id, opponent_id, winner_goals, opponent_goals) VALUES('$YEAR', '$ROUND', '$WINNER_ID', '$OPPONENT_ID', '$WINNER_GOALS', '$OPPONENT_GOALS')")
    if [[ $INSERT_GAMES_RESULT == "Insert 0 1" ]]
    then
    echo "Game inserted: '$WINNER' vs '$OPPONENT'"
    fi

  fi
done