|
| 1 | +use std::sync::Arc; |
| 2 | + |
| 3 | +use mentra::{BuiltinProvider, provider::{self, Provider}}; |
| 4 | + |
| 5 | +#[derive(Debug, Clone, PartialEq, Eq)] |
| 6 | +pub(crate) enum ProviderKind { |
| 7 | + OpenAI, |
| 8 | + Anthropic, |
| 9 | + Gemini, |
| 10 | +} |
| 11 | + |
| 12 | +impl ProviderKind { |
| 13 | + pub(crate) fn parse(value: &str) -> Result<Self, String> { |
| 14 | + match value.trim().to_ascii_lowercase().as_str() { |
| 15 | + "openai" => Ok(Self::OpenAI), |
| 16 | + "anthropic" => Ok(Self::Anthropic), |
| 17 | + "gemini" => Ok(Self::Gemini), |
| 18 | + other => Err(format!( |
| 19 | + "Unsupported provider '{}'. Expected one of: openai, anthropic, gemini", |
| 20 | + other |
| 21 | + )), |
| 22 | + } |
| 23 | + } |
| 24 | + |
| 25 | + pub(crate) fn display_name(&self) -> &'static str { |
| 26 | + match self { |
| 27 | + Self::OpenAI => "openai", |
| 28 | + Self::Anthropic => "anthropic", |
| 29 | + Self::Gemini => "gemini", |
| 30 | + } |
| 31 | + } |
| 32 | + |
| 33 | + pub(crate) fn api_key_env(&self) -> &'static str { |
| 34 | + match self { |
| 35 | + Self::OpenAI => "OPENAI_API_KEY", |
| 36 | + Self::Anthropic => "ANTHROPIC_API_KEY", |
| 37 | + Self::Gemini => "GEMINI_API_KEY", |
| 38 | + } |
| 39 | + } |
| 40 | + |
| 41 | + pub(crate) fn builtin_provider(&self) -> BuiltinProvider { |
| 42 | + match self { |
| 43 | + Self::OpenAI => BuiltinProvider::OpenAI, |
| 44 | + Self::Anthropic => BuiltinProvider::Anthropic, |
| 45 | + Self::Gemini => BuiltinProvider::Gemini, |
| 46 | + } |
| 47 | + } |
| 48 | +} |
| 49 | + |
| 50 | +#[derive(Clone)] |
| 51 | +pub(crate) struct ProviderSetup { |
| 52 | + pub(crate) provider_kind: ProviderKind, |
| 53 | + pub(crate) provider: Arc<dyn Provider>, |
| 54 | +} |
| 55 | + |
| 56 | +pub(crate) fn resolve_provider( |
| 57 | + cli: Option<&str>, |
| 58 | + shared_cfg: Option<&str>, |
| 59 | + legacy_cfg: Option<&str>, |
| 60 | +) -> Result<ProviderKind, String> { |
| 61 | + if let Some(value) = cli { |
| 62 | + return ProviderKind::parse(value); |
| 63 | + } |
| 64 | + if let Some(value) = shared_cfg { |
| 65 | + return ProviderKind::parse(value); |
| 66 | + } |
| 67 | + if let Some(value) = legacy_cfg { |
| 68 | + return ProviderKind::parse(value); |
| 69 | + } |
| 70 | + |
| 71 | + let mut available = Vec::new(); |
| 72 | + for kind in [ |
| 73 | + ProviderKind::OpenAI, |
| 74 | + ProviderKind::Anthropic, |
| 75 | + ProviderKind::Gemini, |
| 76 | + ] { |
| 77 | + if std::env::var(kind.api_key_env()).is_ok() { |
| 78 | + available.push(kind); |
| 79 | + } |
| 80 | + } |
| 81 | + |
| 82 | + match available.len() { |
| 83 | + 1 => Ok(available.remove(0)), |
| 84 | + 0 => Err( |
| 85 | + "--provider is required (or set ai.provider in langcodec.toml, or use legacy translate.provider, or configure exactly one provider API key)" |
| 86 | + .to_string(), |
| 87 | + ), |
| 88 | + _ => Err( |
| 89 | + "Multiple provider API keys are configured; specify --provider or set ai.provider in langcodec.toml" |
| 90 | + .to_string(), |
| 91 | + ), |
| 92 | + } |
| 93 | +} |
| 94 | + |
| 95 | +pub(crate) fn resolve_model( |
| 96 | + cli: Option<&str>, |
| 97 | + shared_cfg: Option<&str>, |
| 98 | + legacy_cfg: Option<&str>, |
| 99 | +) -> Result<String, String> { |
| 100 | + cli.map(ToOwned::to_owned) |
| 101 | + .or_else(|| shared_cfg.map(ToOwned::to_owned)) |
| 102 | + .or_else(|| legacy_cfg.map(ToOwned::to_owned)) |
| 103 | + .or_else(|| std::env::var("MENTRA_MODEL").ok()) |
| 104 | + .ok_or_else(|| { |
| 105 | + "--model is required (or set ai.model in langcodec.toml, or use legacy translate.model, or set MENTRA_MODEL)" |
| 106 | + .to_string() |
| 107 | + }) |
| 108 | +} |
| 109 | + |
| 110 | +pub(crate) fn read_api_key(kind: &ProviderKind) -> Result<String, String> { |
| 111 | + std::env::var(kind.api_key_env()).map_err(|_| { |
| 112 | + format!( |
| 113 | + "Missing {} environment variable for {} provider", |
| 114 | + kind.api_key_env(), |
| 115 | + kind.display_name() |
| 116 | + ) |
| 117 | + }) |
| 118 | +} |
| 119 | + |
| 120 | +pub(crate) fn build_provider(kind: &ProviderKind) -> Result<ProviderSetup, String> { |
| 121 | + let api_key = read_api_key(kind)?; |
| 122 | + |
| 123 | + let provider: Arc<dyn Provider> = match kind { |
| 124 | + ProviderKind::OpenAI => Arc::new(provider::openai::OpenAIProvider::new(api_key)), |
| 125 | + ProviderKind::Anthropic => Arc::new(provider::anthropic::AnthropicProvider::new(api_key)), |
| 126 | + ProviderKind::Gemini => Arc::new(provider::gemini::GeminiProvider::new(api_key)), |
| 127 | + }; |
| 128 | + |
| 129 | + Ok(ProviderSetup { |
| 130 | + provider_kind: kind.clone(), |
| 131 | + provider, |
| 132 | + }) |
| 133 | +} |
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