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| 1 | +import { TaggedError } from "better-result"; |
| 2 | +import type { LocalAgentProvider } from "./local-agent-profiles.js"; |
| 3 | + |
| 4 | +export class ProviderUnavailableError extends TaggedError( |
| 5 | + "ProviderUnavailableError", |
| 6 | +)<{ |
| 7 | + provider: LocalAgentProvider; |
| 8 | + message: string; |
| 9 | +}>() { |
| 10 | + constructor(provider: LocalAgentProvider, message?: string) { |
| 11 | + super({ |
| 12 | + provider, |
| 13 | + message: message ?? `Agent provider is unavailable: ${provider}`, |
| 14 | + }); |
| 15 | + } |
| 16 | +} |
| 17 | + |
| 18 | +export class ProviderSchemaUnsupportedError extends TaggedError( |
| 19 | + "ProviderSchemaUnsupportedError", |
| 20 | +)<{ |
| 21 | + provider: LocalAgentProvider; |
| 22 | + cause: unknown; |
| 23 | + message: string; |
| 24 | +}>() { |
| 25 | + constructor(provider: LocalAgentProvider, cause: unknown) { |
| 26 | + super({ |
| 27 | + provider, |
| 28 | + cause, |
| 29 | + message: `${provider} does not support the requested native output schema: ${errorMessage(cause)}`, |
| 30 | + }); |
| 31 | + } |
| 32 | +} |
| 33 | + |
| 34 | +export class ProviderCancelledError extends TaggedError( |
| 35 | + "ProviderCancelledError", |
| 36 | +)<{ |
| 37 | + provider: LocalAgentProvider; |
| 38 | + cause: unknown; |
| 39 | + message: string; |
| 40 | +}>() { |
| 41 | + constructor(provider: LocalAgentProvider, cause: unknown) { |
| 42 | + super({ |
| 43 | + provider, |
| 44 | + cause, |
| 45 | + message: `Agent provider was cancelled: ${provider}`, |
| 46 | + }); |
| 47 | + } |
| 48 | +} |
| 49 | + |
| 50 | +export class ProviderExecutionError extends TaggedError( |
| 51 | + "ProviderExecutionError", |
| 52 | +)<{ |
| 53 | + provider: LocalAgentProvider; |
| 54 | + retryable: boolean; |
| 55 | + cause: unknown; |
| 56 | + message: string; |
| 57 | +}>() { |
| 58 | + constructor(input: { |
| 59 | + provider: LocalAgentProvider; |
| 60 | + cause: unknown; |
| 61 | + retryable?: boolean; |
| 62 | + }) { |
| 63 | + super({ |
| 64 | + provider: input.provider, |
| 65 | + retryable: input.retryable ?? false, |
| 66 | + cause: input.cause, |
| 67 | + message: `${input.provider} agent execution failed: ${errorMessage(input.cause)}`, |
| 68 | + }); |
| 69 | + } |
| 70 | +} |
| 71 | + |
| 72 | +export type AgentProviderError = |
| 73 | + | ProviderUnavailableError |
| 74 | + | ProviderSchemaUnsupportedError |
| 75 | + | ProviderCancelledError |
| 76 | + | ProviderExecutionError; |
| 77 | + |
| 78 | +export function isAgentProviderError(error: unknown): error is AgentProviderError { |
| 79 | + return ( |
| 80 | + ProviderUnavailableError.is(error) || |
| 81 | + ProviderSchemaUnsupportedError.is(error) || |
| 82 | + ProviderCancelledError.is(error) || |
| 83 | + ProviderExecutionError.is(error) |
| 84 | + ); |
| 85 | +} |
| 86 | + |
| 87 | +export function isProviderSchemaUnsupportedError( |
| 88 | + error: unknown, |
| 89 | +): error is ProviderSchemaUnsupportedError { |
| 90 | + return ProviderSchemaUnsupportedError.is(error); |
| 91 | +} |
| 92 | + |
| 93 | +export function isNativeSchemaUnsupportedFailure(error: unknown): boolean { |
| 94 | + const message = errorMessage(error).toLowerCase(); |
| 95 | + const mentionsSchema = |
| 96 | + /output[ _-]?schema/.test(message) || |
| 97 | + /json[ _-]?schema/.test(message) || |
| 98 | + /structured[ _-]?output/.test(message) || |
| 99 | + /output[ _-]?format/.test(message); |
| 100 | + const unsupported = |
| 101 | + /not supported/.test(message) || |
| 102 | + /unsupported/.test(message) || |
| 103 | + /invalid (?:output|json )?schema/.test(message) || |
| 104 | + /schema (?:is )?invalid/.test(message) || |
| 105 | + /unknown (?:field|parameter|option)/.test(message) || |
| 106 | + /not available/.test(message); |
| 107 | + return mentionsSchema && unsupported; |
| 108 | +} |
| 109 | + |
| 110 | +export function classifyAgentProviderError( |
| 111 | + provider: LocalAgentProvider, |
| 112 | + cause: unknown, |
| 113 | +): AgentProviderError { |
| 114 | + if (isAgentProviderError(cause)) return cause; |
| 115 | + if (isCancellation(cause)) return new ProviderCancelledError(provider, cause); |
| 116 | + if (isNativeSchemaUnsupportedFailure(cause)) { |
| 117 | + return new ProviderSchemaUnsupportedError(provider, cause); |
| 118 | + } |
| 119 | + return new ProviderExecutionError({ provider, cause }); |
| 120 | +} |
| 121 | + |
| 122 | +function isCancellation(error: unknown): boolean { |
| 123 | + return Boolean( |
| 124 | + error && |
| 125 | + typeof error === "object" && |
| 126 | + "name" in error && |
| 127 | + String((error as { name?: unknown }).name) === "AbortError", |
| 128 | + ); |
| 129 | +} |
| 130 | + |
| 131 | +function errorMessage(error: unknown): string { |
| 132 | + return error instanceof Error ? error.message : String(error); |
| 133 | +} |
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