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const PROVIDER_ID = /^[a-z0-9][a-z0-9-_]*$/
const OPENAI_COMPATIBLE = "@ai-sdk/openai-compatible"
type Translator = (key: string, vars?: Record<string, string | number | boolean>) => string
export type ModelErr = {
id?: string
name?: string
}
export type HeaderErr = {
key?: string
value?: string
}
export type ModelRow = {
row: string
id: string
name: string
err: ModelErr
}
export type HeaderRow = {
row: string
key: string
value: string
err: HeaderErr
}
export type FormState = {
providerID: string
name: string
baseURL: string
apiKey: string
models: ModelRow[]
headers: HeaderRow[]
err: {
providerID?: string
name?: string
baseURL?: string
}
}
type ValidateArgs = {
form: FormState
t: Translator
disabledProviders: string[]
existingProviderIDs: Set<string>
}
export function validateCustomProvider(input: ValidateArgs) {
const providerID = input.form.providerID.trim()
const name = input.form.name.trim()
const baseURL = input.form.baseURL.trim()
const apiKey = input.form.apiKey.trim()
const env = apiKey.match(/^\{env:([^}]+)\}$/)?.[1]?.trim()
const key = apiKey && !env ? apiKey : undefined
const idError = !providerID
? input.t("provider.custom.error.providerID.required")
: !PROVIDER_ID.test(providerID)
? input.t("provider.custom.error.providerID.format")
: undefined
const nameError = !name ? input.t("provider.custom.error.name.required") : undefined
const urlError = !baseURL
? input.t("provider.custom.error.baseURL.required")
: !/^https?:\/\//.test(baseURL)
? input.t("provider.custom.error.baseURL.format")
: undefined
const disabled = input.disabledProviders.includes(providerID)
const existsError = idError
? undefined
: input.existingProviderIDs.has(providerID) && !disabled
? input.t("provider.custom.error.providerID.exists")
: undefined
const seenModels = new Set<string>()
const models = input.form.models.map((m) => {
const id = m.id.trim()
const idError = !id
? input.t("provider.custom.error.required")
: seenModels.has(id)
? input.t("provider.custom.error.duplicate")
: (() => {
seenModels.add(id)
return undefined
})()
const nameError = !m.name.trim() ? input.t("provider.custom.error.required") : undefined
return { id: idError, name: nameError }
})
const modelsValid = models.every((m) => !m.id && !m.name)
const modelConfig = Object.fromEntries(input.form.models.map((m) => [m.id.trim(), { name: m.name.trim() }]))
const seenHeaders = new Set<string>()
const headers = input.form.headers.map((h) => {
const key = h.key.trim()
const value = h.value.trim()
if (!key && !value) return {}
const keyError = !key
? input.t("provider.custom.error.required")
: seenHeaders.has(key.toLowerCase())
? input.t("provider.custom.error.duplicate")
: (() => {
seenHeaders.add(key.toLowerCase())
return undefined
})()
const valueError = !value ? input.t("provider.custom.error.required") : undefined
return { key: keyError, value: valueError }
})
const headersValid = headers.every((h) => !h.key && !h.value)
const headerConfig = Object.fromEntries(
input.form.headers
.map((h) => ({ key: h.key.trim(), value: h.value.trim() }))
.filter((h) => !!h.key && !!h.value)
.map((h) => [h.key, h.value]),
)
const err = {
providerID: idError ?? existsError,
name: nameError,
baseURL: urlError,
}
const ok = !idError && !existsError && !nameError && !urlError && modelsValid && headersValid
if (!ok) return { err, models, headers }
return {
err,
models,
headers,
result: {
providerID,
name,
key,
config: {
npm: OPENAI_COMPATIBLE,
name,
...(env ? { env: [env] } : {}),
options: {
baseURL,
...(Object.keys(headerConfig).length ? { headers: headerConfig } : {}),
},
models: modelConfig,
},
},
}
}
let row = 0
const nextRow = () => `row-${row++}`
export const modelRow = (): ModelRow => ({ row: nextRow(), id: "", name: "", err: {} })
export const headerRow = (): HeaderRow => ({ row: nextRow(), key: "", value: "", err: {} })
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