Structs.sol

// SPDX-License-Identifier: MIT
// Created by ZENODE (zenodeapp - https://github.com/zenodeapp/)

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pragma solidity ^0.8.17;

library Structs {
  struct Matrix {
    // MATRIX_ID
    string id;

    // The 2D array for the matrix
    int[][] grid; 

    // The ALPHABET_ID this matrix is linked to
    string alphabetId;

    // An index for where this matrix is stored in the matrices-array (only useful for the CRUD)
    uint index;
  }

  struct Alphabet {
    // ALPHABET_ID
    string id; 

    // a list of the alphabet's characters in bytes-representation
    /* NOTE: read about bytes to string conversion if you want to get its alphabetical-value back.
             In Javascript you could use: String.fromCharCode(parseInt(CHAR_IN_BYTES)); */
    bytes1[] array;
    
    // how many times this alphabet is linked to a matrix
    uint usage; 
    
    // an index for where this alphabet is stored in the alphabets-array (only useful for the CRUD)
    uint index;
  }
}