~eli_oat/dice

cd38c240277d30f8228358d52171358de289ddf7 — eli_oat 5 months ago master
*
5 files changed, 392 insertions(+), 0 deletions(-)

A .gitignore
A README.md
A UNLICENSE
A dice.js
A dice.ts
A  => .gitignore +225 -0
@@ 1,225 @@

# Created by https://www.toptal.com/developers/gitignore/api/node,emacs,macos
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A  => README.md +31 -0
@@ 1,31 @@
# Dice

Here is a little class to roll dice given a string in standard dice notation, e.g. `2d20+3`.

## How to use

Instantiate an instance of the class for each player, and then go nuts!

```javascript
// instantiate yo' players
const playerSarah = new diceRoller();
const playerEli = new diceRoller();

// play the game
playerSarah.roll('2d10-4');
playerEli.roll('2d12+12');
playerSarah.roll('1d12');
playerEli.roll('1d2');


// check the log!
console.log('==== Sarah\'s log ====');
playerSarah.log.forEach(logEntry => {
  console.log(logEntry.input + " : " + logEntry.result + " : " + logEntry.timestamp);
});

console.log('==== Eli\'s log ====');
playerEli.log.forEach(logEntry => {
  console.log(logEntry.input + " : " + logEntry.result + " : " + logEntry.timestamp);
});
```
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A  => UNLICENSE +24 -0
@@ 1,24 @@
This is free and unencumbered software released into the public domain.

Anyone is free to copy, modify, publish, use, compile, sell, or
distribute this software, either in source code form or as a compiled
binary, for any purpose, commercial or non-commercial, and by any
means.

In jurisdictions that recognize copyright laws, the author or authors
of this software dedicate any and all copyright interest in the
software to the public domain. We make this dedication for the benefit
of the public at large and to the detriment of our heirs and
successors. We intend this dedication to be an overt act of
relinquishment in perpetuity of all present and future rights to this
software under copyright law.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

For more information, please refer to <http://unlicense.org/>
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A  => dice.js +49 -0
@@ 1,49 @@
class diceRoller {

  constructor() {
    this.log = [];
  }

  validate(diceNotation) {
    const match = /^(\d+)?d(\d+)([+-]\d+)?$/.exec(diceNotation);
    if (!match) {
      throw "Invalid dice notation: " + diceNotation;
    } else {
      return match;
    }
  }

  parseDice(diceNotation) {
    const match = this.validate(diceNotation);
    if (match) {
      const diceInfo = {
        numberOfDice: typeof match[1] === "undefined" ? 1 : parseInt(match[1]),
        sidesOfDice: parseInt(match[2]),
        diceModifier: typeof match[3] === "undefined" ? 0 : parseInt(match[3])
      };
      return diceInfo;
    }
  }

  tallyRolls(diceData) {
    let total = 0;
    for (let i = 0; i < diceData.numberOfDice; i++) {
      total += Math.floor(Math.random() * diceData.sidesOfDice) + 1;
    }
    total += diceData.diceModifier;
    return total;
  }

  roll(humanInput) {
    const rollResult = this.tallyRolls(this.parseDice(humanInput));
    const rightNow = new Date();
    let logEntry = {
      "timestamp": rightNow.toISOString(),
      "input": humanInput,
      "result": rollResult
    }
    this.log.push(logEntry);
    return rollResult;
  }

};
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A  => dice.ts +63 -0
@@ 1,63 @@
interface Dice {
    numberOfDice: number;
    sidesOfDice: number;
    diceModifier: number;
}

interface LogEntry {
    timestamp: string;
    input: string;
    result: number;
}

class DiceRoller {

  readonly log: LogEntry[];

  constructor() {
    this.log = [];
  }

  roll(humanInput: string): number {
    const rollResult = this.tallyRolls(this.parseDice(humanInput));
    const rightNow = new Date();
    let logEntry = {
      "timestamp": rightNow.toISOString(),
      "input": humanInput,
      "result": rollResult
    }
    this.log.push(logEntry);
    return rollResult;
  }

  private parseDice(diceNotation: string): Dice | undefined {
    const match = this.validate(diceNotation);
    if (match) {
      const diceInfo = {
        numberOfDice: typeof match[1] === "undefined" ? 1 : parseInt(match[1]),
        sidesOfDice: parseInt(match[2]),
        diceModifier: typeof match[3] === "undefined" ? 0 : parseInt(match[3])
      };
      return diceInfo;
    }
  }

  private validate(diceNotation: string): RegExpExecArray | undefined {
    const match = /^(\d+)?d(\d+)([+-]\d+)?$/.exec(diceNotation);
    if (!match) {
      throw "Invalid dice notation: " + diceNotation;
    } else {
      return match;
    }
  }

  private tallyRolls(diceData: Dice): number {
    let total = 0;
    for (let i = 0; i < diceData.numberOfDice; i++) {
      total += Math.floor(Math.random() * diceData.sidesOfDice) + 1;
    }
    total += diceData.diceModifier;
    return total;
  }

};
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