Problem

See CHALLENGE

How to build

First, compile the code and create the .jar file. To do that, in the project folder, in the terminal run:

javac -d galaxy-merchant/target/classes galaxy-merchant/src/main/java/galaxy/*.java 
jar cvfm galaxy-merchant.jar Manifest.MF -C galaxy-merchant/target/classes/ .   

How to run

In the terminal open the directory, where you put the .jar file and run:

java -jar galaxy-merchant.jar

Assumptions

The program:

• accepts just the terrestrial Latin alphabet.
• accepts notes and questions in a specific order: it accepts "pish is X" but rejects "X is pish", it answers "how many Credits is glob Gold?" and does not know the answer for "how many Credits is Gold, glob?".
• is case sensitive: it accepts information "glob is I" but rejects "glob is i", it answers the question "how much is glob?" but not "How much is glob?". Therefore word "Credits" must be capitalized, roman numerals must be uppercase, rest of the text should be lowercase. Product names should be provided in the same pattern every time.
• expects a question mark at the end of a question.
• sanitizes input from extra whitespaces. It accepts "tegj is L" and "  tegj  is    L  ".

Usage

First, the program expects you to provide painstakingly collected notes.

Please provide a path to a file, by typing 'f:{path}' or provide a note in the console:

You can provide a file with notes and questions. The program will inform you if the file doesn't exist. It accepts a relative path.

f:/computer/wrong_path_to_the_file/test-input.txt  
/computer/wrong_path_to_the_file/test-input.txt  (No such file or directory)  
f:test-input.txt  
pish tegj glob glob is 42  
glob prok Silver is 68 Credits  
glob prok Gold is 57800 Credits  
glob prok Iron is 782 Credits  
I have no idea what you are talking about  

The program will wait for the next questions until you type exit.

how much is pish?  
pish is 10  

how many Credits is pish Silver?
pish Silver is 170 Credits

The program doesn't answer accurately for every question.

how do you do?  
I have no idea what you are talking about  

But it informs if it recognizes some misstatements.

how much is glob glob glob glob?  
Invalid numeral  

The program is case sensitive. It's very annoying and should definitely be improved in version 1.1:

How much is pish?  
I have no idea what you are talking about