shlesha 0.5.7

High-performance extensible transliteration library with hub-and-spoke architecture
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176

//! Simple CLI for Shlesha transliterator

use clap::{Parser, Subcommand};
use shlesha::Shlesha;

#[derive(Parser)]
#[command(name = "shlesha")]
#[command(about = "High-performance extensible transliteration", long_about = None)]
struct Cli {
    #[command(subcommand)]
    command: Commands,
}

#[derive(Subcommand)]
enum Commands {
    /// Debug available scripts
    Debug,
    /// Debug test conversion
    DebugTest,
    /// Transliterate text from one script to another
    Transliterate {
        /// Source script (e.g., devanagari, iso)
        #[arg(short, long)]
        from: String,
        /// Target script (e.g., devanagari, iso)
        #[arg(short, long)]
        to: String,
        /// Text to transliterate (or read from stdin if not provided)
        text: Option<String>,
        /// Show detailed metadata breakdown
        #[arg(short, long)]
        verbose: bool,
    },
    /// List supported scripts
    Scripts,
}

fn main() {
    let cli = Cli::parse();
    let transliterator = Shlesha::new();

    match cli.command {
        Commands::Transliterate {
            from,
            to,
            text,
            verbose,
        } => {
            // Get input text
            let input = match text {
                Some(t) => t,
                None => {
                    use std::io::Read;
                    let mut buffer = String::new();
                    std::io::stdin()
                        .read_to_string(&mut buffer)
                        .expect("Failed to read from stdin");
                    buffer.trim().to_string()
                }
            };

            // Perform transliteration with or without metadata
            if verbose {
                match transliterator.transliterate_with_metadata(&input, &from, &to) {
                    Ok(result) => {
                        // Detailed metadata output
                        println!("{}", result.output);
                        if let Some(metadata) = result.metadata {
                            println!("\nMetadata:");
                            println!(
                                "  Source: {} -> Target: {}",
                                metadata.source_script, metadata.target_script
                            );
                            println!("  Extensions used: {}", metadata.used_extensions);
                            if !metadata.unknown_tokens.is_empty() {
                                println!("  Unknown tokens: {}", metadata.unknown_tokens.len());
                                for (i, token) in metadata.unknown_tokens.iter().enumerate() {
                                    println!(
                                        "    {}. '{}' at position {} ({})",
                                        i + 1,
                                        token.token,
                                        token.position,
                                        token.unicode
                                    );
                                }
                            } else {
                                println!("  Unknown tokens: 0");
                            }
                        }
                    }
                    Err(e) => {
                        eprintln!("Error: {e}");
                        std::process::exit(1);
                    }
                }
            } else {
                // Regular transliteration without metadata
                match transliterator.transliterate(&input, &from, &to) {
                    Ok(result) => println!("{result}"),
                    Err(e) => {
                        eprintln!("Error: {e}");
                        std::process::exit(1);
                    }
                }
            }
        }

        Commands::DebugTest => {
            let transliterator = Shlesha::new();

            // Test the API that's failing
            let result = transliterator
                .transliterate_with_metadata("अ", "devanagari", "iast")
                .unwrap();

            println!("Output: '{}'", result.output);
            println!("Expected: 'a'");

            // Also test direct conversion
            let simple_result = transliterator
                .transliterate("अ", "devanagari", "iast")
                .unwrap();

            println!("Simple result: '{}'", simple_result);
        }

        Commands::Debug => {
            use shlesha::modules::script_converter::ScriptConverterRegistry;
            let registry = ScriptConverterRegistry::new_with_all_converters();
            let scripts = registry.list_supported_scripts();

            println!("Available scripts:");
            for script in &scripts {
                println!("  - {}", script);
            }
            println!("Total: {} scripts", scripts.len());

            // Test specific scripts that tests are looking for
            println!("\nScript availability:");
            println!("  devanagari: {}", registry.supports_script("devanagari"));
            println!("  iso: {}", registry.supports_script("iso"));
            println!("  iso15919: {}", registry.supports_script("iso15919"));
            println!("  iast: {}", registry.supports_script("iast"));
        }

        Commands::Scripts => {
            println!("Currently supported scripts:");

            let scripts = transliterator.list_supported_scripts();
            for script in scripts {
                // Provide descriptions for known scripts
                let description = match script.as_str() {
                    "iast" => "IAST (International Alphabet of Sanskrit Transliteration)",
                    "itrans" => "ITRANS (ASCII transliteration)",
                    "slp1" => "SLP1 (Sanskrit Library Phonetic scheme)",
                    "harvard_kyoto" | "hk" => "Harvard-Kyoto (ASCII-based academic standard)",
                    "velthuis" => "Velthuis (TeX-based notation)",
                    "wx" => "WX (Computational notation)",
                    "devanagari" | "deva" => "Devanagari script (देवनागरी)",
                    "bengali" | "bn" => "Bengali script (বাংলা)",
                    "tamil" | "ta" => "Tamil script (தமிழ்)",
                    "telugu" | "te" => "Telugu script (తెలుగు)",
                    "gujarati" | "gu" => "Gujarati script (ગુજરાતી)",
                    "kannada" | "kn" => "Kannada script (ಕನ್ನಡ)",
                    "malayalam" | "ml" => "Malayalam script (മലയാളം)",
                    "odia" | "od" | "oriya" => "Odia script (ଓଡ଼ିଆ)",
                    "iso15919" | "iso" | "iso_15919" => "ISO-15919 (International standard)",
                    "bangla" => "Bengali script (বাংলা)",
                    "wx_notation" => "WX (Computational notation)",
                    _ => "Unknown script type",
                };
                println!("  {script} - {description}");
            }
        }
    }
}