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| 1 | +import { createVoyage } from "voyage-ai-provider"; |
| 2 | +import type { VoyageProvider } from "voyage-ai-provider"; |
| 3 | +import { embedMany } from "ai"; |
| 4 | +import type { UserConfig } from "../config.js"; |
| 5 | +import assert from "assert"; |
| 6 | +import { createFetch } from "@mongodb-js/devtools-proxy-support"; |
| 7 | +import { z } from "zod"; |
| 8 | + |
| 9 | +type EmbeddingsInput = string; |
| 10 | +type Embeddings = number[]; |
| 11 | +export type EmbeddingParameters = { |
| 12 | + inputType: "query" | "document"; |
| 13 | +}; |
| 14 | + |
| 15 | +interface EmbeddingsProvider<SupportedModels extends string, SupportedEmbeddingParameters extends EmbeddingParameters> { |
| 16 | + embed( |
| 17 | + modelId: SupportedModels, |
| 18 | + content: EmbeddingsInput[], |
| 19 | + parameters: SupportedEmbeddingParameters |
| 20 | + ): Promise<Embeddings[]>; |
| 21 | +} |
| 22 | + |
| 23 | +export const zVoyageModels = z |
| 24 | + .enum(["voyage-3-large", "voyage-3.5", "voyage-3.5-lite", "voyage-code-3"]) |
| 25 | + .default("voyage-3-large"); |
| 26 | + |
| 27 | +export const zVoyageEmbeddingParameters = z.object({ |
| 28 | + outputDimension: z |
| 29 | + .union([z.literal(256), z.literal(512), z.literal(1024), z.literal(2048), z.literal(4096)]) |
| 30 | + .optional() |
| 31 | + .default(1024), |
| 32 | + outputDType: z.enum(["float", "int8", "uint8", "binary", "ubinary"]).optional().default("float"), |
| 33 | +}); |
| 34 | + |
| 35 | +type VoyageModels = z.infer<typeof zVoyageModels>; |
| 36 | +type VoyageEmbeddingParameters = z.infer<typeof zVoyageEmbeddingParameters> & EmbeddingParameters; |
| 37 | + |
| 38 | +class VoyageEmbeddingsProvider implements EmbeddingsProvider<VoyageModels, VoyageEmbeddingParameters> { |
| 39 | + private readonly voyage: VoyageProvider; |
| 40 | + |
| 41 | + constructor({ voyageApiKey }: UserConfig, providedFetch?: typeof fetch) { |
| 42 | + assert(voyageApiKey, "voyageApiKey does not exist. This is likely a bug."); |
| 43 | + |
| 44 | + // We should always use, by default, any enterprise proxy that the user has configured. |
| 45 | + // Direct requests to VoyageAI might get blocked by the network if they don't go through |
| 46 | + // the provided proxy. |
| 47 | + const customFetch: typeof fetch = (providedFetch ?? |
| 48 | + createFetch({ useEnvironmentVariableProxies: true })) as unknown as typeof fetch; |
| 49 | + |
| 50 | + this.voyage = createVoyage({ apiKey: voyageApiKey, fetch: customFetch }); |
| 51 | + } |
| 52 | + |
| 53 | + static isConfiguredIn({ voyageApiKey }: UserConfig): boolean { |
| 54 | + return !!voyageApiKey; |
| 55 | + } |
| 56 | + |
| 57 | + async embed<Model extends VoyageModels>( |
| 58 | + modelId: Model, |
| 59 | + content: EmbeddingsInput[], |
| 60 | + parameters: VoyageEmbeddingParameters |
| 61 | + ): Promise<Embeddings[]> { |
| 62 | + const model = this.voyage.textEmbeddingModel(modelId); |
| 63 | + const { embeddings } = await embedMany({ |
| 64 | + model, |
| 65 | + values: content, |
| 66 | + providerOptions: { voyage: parameters }, |
| 67 | + }); |
| 68 | + |
| 69 | + return embeddings; |
| 70 | + } |
| 71 | +} |
| 72 | + |
| 73 | +export function getEmbeddingsProvider( |
| 74 | + userConfig: UserConfig |
| 75 | +): EmbeddingsProvider<VoyageModels, VoyageEmbeddingParameters> | undefined { |
| 76 | + if (VoyageEmbeddingsProvider.isConfiguredIn(userConfig)) { |
| 77 | + return new VoyageEmbeddingsProvider(userConfig); |
| 78 | + } |
| 79 | + |
| 80 | + return undefined; |
| 81 | +} |
| 82 | + |
| 83 | +export const zSupportedEmbeddingParameters = zVoyageEmbeddingParameters.extend({ model: zVoyageModels }); |
| 84 | +export type SupportedEmbeddingParameters = z.infer<typeof zSupportedEmbeddingParameters>; |
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