Write a Ruby on Rails API that takes score of a bowling game.

You have the freedom to define the architecture of the API and how its endpoints will look. Main Requirements: The API should be written using Ruby on Rails. In addition, it should provide the following:

● A way to start a new bowling game; ● A way to input the number of pins knocked down by each ball; ● A way to output the current game score (score for each frame and total score).

Imagine that this API will be used by a bowling house. On the screen the user starts the game, then after each throw the machine, with a sensor, counts how many pins were dropped and calls the API sending this information. In the meantime the screen is constantly (for example: every 2 seconds) asking the API for the current game status and displays it.

Logic details ● Bowling is played by throwing a ball down a narrow alley toward ten wooden pins. The objective is to knock down as many pins as possible per throw. ● The game is played in ten frames. At the beginning of each frame, all ten pins are set up. The player then gets two tries to knock them all down. ● If the player knocks all the pins down on the first try, it is called a "strike,“ and the frame ends. ● If the player fails to knock down all the pins with his first ball, but succeeds with the second ball, it is called a "spare“. ● After the second ball of the frame, the frame ends even if there are still pins standing. ● A strike frame is scored by adding ten, plus the number of pins knocked down by the next two balls, to the score of the previous frame. ● A spare frame is scored by adding ten, plus the number of pins knocked down by the next ball, to the score of the previous frame. ● Otherwise, a frame is scored by adding the number of pins knocked down by the two balls in the frame to the score of the previous frame. ● If a strike is thrown in the tenth frame, then the player may throw two more balls to complete the score of the strike. ● Likewise, if a spare is thrown in the tenth frame, the player may throw one more ball to complete the score of the spare. ● Thus the tenth frame may have three balls instead of two.

For background information, please see http://en.wikipedia.org/wiki/Ten-pin_bowling