Evaluate Jira expression

type Jira = {

  username: string;

  password: string;

  domain: string;

};

/**

 * Evaluate Jira expression

 * Evaluates a Jira expression and returns its value.

 */

export async function main(

  auth: Jira,

  expand: string | undefined,

  body: {

    context?: {

      board?: number;

      custom?: (

        | { accountId: string; type: string; [k: string]: unknown }

        | { id?: number; key?: string; type: string; [k: string]: unknown }

        | {

            type: string;

            value?: { [k: string]: unknown };

            [k: string]: unknown;

          }

      )[];

      customerRequest?: number;

      issue?: { id?: number; key?: string };

      issues?: {

        jql?: {

          maxResults?: number;

          query?: string;

          startAt?: number;

          validation?: "strict" | "warn" | "none";

        };

      };

      project?: { id?: number; key?: string };

      serviceDesk?: number;

      sprint?: number;

    };

    expression: string;

  }

) {

  const url = new URL(

    `https://${auth.domain}.atlassian.net/rest/api/2/expression/eval`

  );

  for (const [k, v] of [["expand", expand]]) {

    if (v !== undefined && v !== "") {

      url.searchParams.append(k, v);

    }

  }

  const response = await fetch(url, {

    method: "POST",

    headers: {

      "Content-Type": "application/json",

      Authorization: "Basic " + btoa(`${auth.username}:${auth.password}`),

    },

    body: JSON.stringify(body),

  });

  if (!response.ok) {

    const text = await response.text();

    throw new Error(`${response.status} ${text}`);

  }

  return await response.json();

}