79 lines
1.8 KiB
TypeScript
79 lines
1.8 KiB
TypeScript
import { pipe } from "fp-ts/function"
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import * as E from "fp-ts/Either"
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import {parseTemplateStringE} from "./environment";
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export type Environment = {
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name: string
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variables: {
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key: string
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value: string
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}[]
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}
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export type Variables = {
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key: string
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value: string
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}[]
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const REGEX_ENV_VAR = /<<([^>]*)>>/g // "<<myVariable>>"
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const REGEX_MY_VAR = /{{([^}]*)}}/g // "{{myVariable}}"
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/**
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* How much times can we expand environment variables
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*/
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const ENV_MAX_EXPAND_LIMIT = 10
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/**
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* Error state when there is a suspected loop while
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* recursively expanding variables
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*/
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const ENV_EXPAND_LOOP = "ENV_EXPAND_LOOP" as const
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export function parseTemplateStringEV(
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str: string,
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variables: Environment["variables"],
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myVariables: Variables
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) {
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if (!variables || !str || !myVariables) {
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return E.right(str)
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}
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let result = str
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let depth = 0
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while (result.match(REGEX_ENV_VAR) != null && depth <= ENV_MAX_EXPAND_LIMIT) {
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result = decodeURI(encodeURI(result)).replace(
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REGEX_ENV_VAR,
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(_, p1) => variables.find((x) => x.key === p1)?.value || ""
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)
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depth++
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}
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/**
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* TODO: Create an error state when there is a suspected loop while recursively expanding these variables
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*/
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while (result.match(REGEX_MY_VAR) != null && depth <= ENV_MAX_EXPAND_LIMIT) {
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result = decodeURI(encodeURI(result)).replace(
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REGEX_MY_VAR,
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(_, p1) => myVariables.find((x) => x.key === p1)?.value || ""
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)
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}
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return depth > ENV_MAX_EXPAND_LIMIT
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? E.left(ENV_EXPAND_LOOP)
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: E.right(result)
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}
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/**
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* @deprecated Use `parseTemplateStringEV` instead
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*/
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export const parseTemplateStringV = (
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str: string,
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variables: Environment["variables"],
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myVariables: Variables
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) =>
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pipe(
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parseTemplateStringEV(str, variables, myVariables),
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E.getOrElse(() => str)
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)
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