zedseven/Romanization.NET

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Romanization/Languages/Greek/Ancient/BetaCode.cs

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using Romanization.Internal;
using System;
using System.Collections.Generic;
using System.Diagnostics.Contracts;
using System.Globalization;

// ReSharper disable CheckNamespace
// ReSharper disable CommentTypo
// ReSharper disable IdentifierTypo
// ReSharper disable StringLiteralTypo
// ReSharper disable InconsistentNaming

namespace Romanization
{
    public static partial class Greek
    {
        public static partial class Ancient
        {
            /// <summary>
            /// The Beta Code Greek romanization system.<br />
            /// For more information, visit:
            /// <a href='https://en.wikipedia.org/wiki/Beta_Code'>https://en.wikipedia.org/wiki/Beta_Code</a>
            /// </summary>
            public sealed class BetaCode : IMultiInCultureSystem
            {
                /// <inheritdoc />
                public SystemType Type => SystemType.Transliteration;

                /// <inheritdoc />
                public CultureInfo DefaultCulture => CultureInfo.GetCultureInfo("el-GR");

                // System-Specific Constants
                private readonly Dictionary<string, string> DiacriticsTable        = new Dictionary<string, string>();
                private readonly Dictionary<string, string> PunctuationTable       = new Dictionary<string, string>();
                private readonly Dictionary<string, string> CommonReplacementTable = new Dictionary<string, string>();
                //private readonly Dictionary<string, string> FullReplacementTable   = new Dictionary<string, string>();

                /// <summary>
                /// Instantiates a copy of the system to process romanizations.
                /// </summary>
                public BetaCode()
                {
                    #region Common Replacement Chart

                    // Sourced from https://en.wikipedia.org/wiki/Beta_Code and http://stephanus.tlg.uci.edu/encoding/BCM.pdf

                    // Diacritics
                    DiacriticsTable["\u0313"] =  ")"; // Smooth breathing
                    DiacriticsTable["\u0314"] =  "("; // Rough breathing
                    DiacriticsTable["\u0301"] =  "/"; // Acute accent
                    DiacriticsTable["\u0342"] =  "="; // Circumflex accent
                    DiacriticsTable["\u0300"] = "\\"; // Grave accent
                    DiacriticsTable["\u0308"] =  "+"; // Diaeresis
                    DiacriticsTable["\u0345"] =  "|"; // Iota subscript
                    DiacriticsTable["\u0304"] =  "&"; // Macron
                    DiacriticsTable["\u0306"] =  "'"; // Breve

                    // Punctuation
                    //PunctuationTable["."] =       "."; // Low dot
                    //PunctuationTable[","] =       ","; // Comma
                    PunctuationTable["\u0387"] =    ":"; // Mid dot
                    //PunctuationTable[";"] =       ";"; // Question mark
                    PunctuationTable["\u037E"] =    ";"; // Distinct from above but visually the same
                    PunctuationTable["\u02D9"] = "#762"; // High dot (in ancient Greek this acted as a full stop)
                    PunctuationTable["\u205A"] =  "#52"; // In ancient texts the Greek two-dot punctuation mark (looks like a colon) served as the full stop
                    //PunctuationTable["'"] =       "'"; // Apostrophe
                    PunctuationTable["’"] =         "'"; // Distinct from above but visually the same
                    //PunctuationTable["-"] =       "-"; // Hyphen
                    PunctuationTable["‐"] =         "-"; // Distinct from above but visually the same
                    PunctuationTable["—"] =         "_"; // Dash
                    PunctuationTable["ʹ"] =         "#"; // Keraia
                    PunctuationTable["ʹ"] =         "#"; // Distinct from above but visually the same
                    PunctuationTable["ʺ"] =         "#"; // Double Keraia

                    // Main characters (2021)
                    CommonReplacementTable["Α"] =  "*A";
                    CommonReplacementTable["α"] =   "A";
                    CommonReplacementTable["Β"] =  "*B";
                    CommonReplacementTable["β"] =   "B";
                    CommonReplacementTable["Γ"] =  "*G";
                    CommonReplacementTable["γ"] =   "G";
                    CommonReplacementTable["Δ"] =  "*D";
                    CommonReplacementTable["δ"] =   "D";
                    CommonReplacementTable["Ε"] =  "*E";
                    CommonReplacementTable["ε"] =   "E";
                    CommonReplacementTable["ϝ"] =  "*V"; // Digamma
                    CommonReplacementTable["ͷ"] =   "V"; // Digamma
                    CommonReplacementTable["Ζ"] =  "*Z";
                    CommonReplacementTable["ζ"] =   "Z";
                    CommonReplacementTable["Η"] =  "*H";
                    CommonReplacementTable["η"] =   "H";
                    CommonReplacementTable["Θ"] =  "*Q";
                    CommonReplacementTable["θ"] =   "Q";
                    CommonReplacementTable["Ι"] =  "*I";
                    CommonReplacementTable["ι"] =   "I";
                    CommonReplacementTable["Κ"] =  "*K";
                    CommonReplacementTable["κ"] =   "K";
                    CommonReplacementTable["Λ"] =  "*L";
                    CommonReplacementTable["λ"] =   "L";
                    CommonReplacementTable["Μ"] =  "*M";
                    CommonReplacementTable["μ"] =   "M";
                    CommonReplacementTable["Ν"] =  "*N";
                    CommonReplacementTable["ν"] =   "N";
                    CommonReplacementTable["Ξ"] =  "*C";
                    CommonReplacementTable["ξ"] =   "C";
                    CommonReplacementTable["Ο"] =  "*O";
                    CommonReplacementTable["ο"] =   "O";
                    CommonReplacementTable["Π"] =  "*P";
                    CommonReplacementTable["π"] =   "P";
                    CommonReplacementTable["Ρ"] =  "*R";
                    CommonReplacementTable["ρ"] =   "R";
                    CommonReplacementTable["Σ"] =  "*S";
                    CommonReplacementTable["σ"] =  "S1";
                    CommonReplacementTable["ς"] =  "S2";
                    CommonReplacementTable["Ϲ"] = "*S3"; // Lunate sigma
                    CommonReplacementTable["ϲ"] =  "S3"; // Lunate sigma
                    CommonReplacementTable["Τ"] =  "*T";
                    CommonReplacementTable["τ"] =   "T";
                    CommonReplacementTable["Υ"] =  "*U";
                    CommonReplacementTable["υ"] =   "U";
                    CommonReplacementTable["Φ"] =  "*F";
                    CommonReplacementTable["φ"] =   "F";
                    CommonReplacementTable["Χ"] =  "*X";
                    CommonReplacementTable["χ"] =   "X";
                    CommonReplacementTable["Ψ"] =  "*Y";
                    CommonReplacementTable["ψ"] =   "Y";
                    CommonReplacementTable["Ω"] =  "*W";
                    CommonReplacementTable["ω"] =   "W";

                    // Uncommon letters
                    CommonReplacementTable["Ϛ"] =   "*#2"; // Stigma
                    CommonReplacementTable["ϛ"] =    "#2"; // Stigma
                    CommonReplacementTable["Ϙ"] =   "*#3"; // Koppa
                    CommonReplacementTable["ϙ"] =    "#3"; // Koppa
                    CommonReplacementTable["Ϟ"] =   "*#3"; // Koppa
                    CommonReplacementTable["ϟ"] =    "#3"; // Koppa
                    CommonReplacementTable["Ϡ"] =   "*#5"; // Sampi
                    CommonReplacementTable["ϡ"] =    "#5"; // Sampi
                    CommonReplacementTable["Ͳ"] =   "*#5"; // Sampi
                    CommonReplacementTable["ͳ"] =    "#5"; // Sampi
                    CommonReplacementTable["Ϻ"] = "*#711"; // San
                    CommonReplacementTable["ϻ"] =  "#711"; // San
                    CommonReplacementTable["Ϳ"] = "*#401"; // Yot
                    CommonReplacementTable["ϳ"] =  "#401"; // Yot

                    #endregion
                }

                /// <summary>
                /// Performs Beta Code Greek romanization on the given text.<br />
                /// Supports providing a specific <paramref name="nativeCulture"/> to process with, as long as the
                /// country code is <c>el</c>.
                /// </summary>
                /// <param name="text">The text to romanize.</param>
                /// <param name="nativeCulture">The culture to romanize from.</param>
                /// <returns>A romanized version of the text, leaving unrecognized characters untouched.</returns>
                /// <exception cref="IrrelevantCultureException"><paramref name="nativeCulture"/> is irrelevant to the
                /// language/region.</exception>
                [Pure]
                public string Process(string text, CultureInfo nativeCulture)
                {
                    if (nativeCulture.TwoLetterISOLanguageName.ToLowerInvariant() != "el")
                        throw new IrrelevantCultureException(nativeCulture.DisplayName, nameof(nativeCulture));
                    return CulturalOperations.RunWithCulture(nativeCulture, () => text
                        // General preparation, normalization
                        .LanguageWidePreparation()
                        // Do common replacements
                        .ReplaceFromChart(DiacriticsTable, StringComparison.Ordinal)
                        .ReplaceFromChart(PunctuationTable, StringComparison.Ordinal)
                        .ReplaceFromChart(CommonReplacementTable));
                }

                /// <summary>
                /// Performs Beta Code Greek romanization on the given text.
                /// </summary>
                /// <param name="text">The text to romanize.</param>
                /// <returns>A romanized version of the text, leaving unrecognized characters untouched.</returns>
                [Pure]
                public string Process(string text)
                    => Process(text, DefaultCulture);
            }
        }
    }
}