freeCodeCamp.org-Relational-Database/Periodic-Table-Database
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fix: added missing element.sh file

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This commit is contained in:
Manish 2022-07-05 12:52:22 +02:00
parent 3c046890be
commit 005cfc6960
1 changed files with 28 additions and 0 deletions
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28
element.sh
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@ -1 +1,29 @@
#!/bin/bash
PSQL="psql -X --username=freecodecamp --dbname=periodic_table --no-align --tuples-only -c"
if [[ $# -ge 1 ]]
then
if [[ $1 =~ ^[0-9]+$ ]]
then
ELEMENTQUERY=$($PSQL "SELECT atomic_number, symbol, name FROM elements WHERE atomic_number=$1")
IFS="|" read ATOMIC_NUMBER SYMBOL NAME <<< $ELEMENTQUERY
elif [[ ${#1} -le 2 ]]
then
ELEMENTQUERY=$($PSQL "SELECT atomic_number, symbol, name FROM elements WHERE symbol='$1'")
IFS="|" read ATOMIC_NUMBER SYMBOL NAME <<< $ELEMENTQUERY
else else
ELEMENTQUERY=$($PSQL "SELECT atomic_number, symbol, name FROM elements WHERE name='$1'")
IFS="|" read ATOMIC_NUMBER SYMBOL NAME <<< $ELEMENTQUERY
fi
if [[ ${#ELEMENTQUERY} -le 0 ]]
then
echo -e "I could not find that element in the database."
else
PROPERTIESQUERY=$($PSQL "SELECT atomic_mass::REAL, melting_point_celsius, boiling_point_celsius, type_id FROM properties WHERE atomic_number=$ATOMIC_NUMBER")
IFS="|" read ATOMIC_MASS MELTING_POINT BOILING_POINT TYPE_ID <<< $PROPERTIESQUERY
TYPE=$($PSQL "SELECT type FROM types WHERE type_id=$TYPE_ID")
echo -e "The element with atomic number $ATOMIC_NUMBER is $NAME ($SYMBOL). It's a $TYPE, with a mass of $ATOMIC_MASS amu. $NAME has a melting point of $MELTING_POINT celsius and a boiling point of $BOILING_POINT celsius."
fi
else
echo "Please provide an element as an argument."
fi