Create workflow transition property

type Jira = {

  username: string;

  password: string;

  domain: string;

};

/**

 * Create workflow transition property

 * Adds a property to a workflow transition. Transition properties are used to change the behavior of a transition. For more information, see [Transition properties](https://confluence.atlassian.com/x/zIhKLg#Advancedworkflowconfiguration-transitionproperties) and [Workflow properties](https://confluence.atlassian.com/x/JYlKLg).

**[Permissions](#permissions) required:** *Administer Jira* [global permission](https://confluence.atlassian.com/x/x4dKLg).

 */

export async function main(

  auth: Jira,

  transitionId: string,

  key: string | undefined,

  workflowName: string | undefined,

  workflowMode: "live" | "draft" | undefined,

  body: { id?: string; key?: string; value: string; [k: string]: unknown }

) {

  const url = new URL(

    `https://${auth.domain}.atlassian.net/rest/api/2/workflow/transitions/${transitionId}/properties`

  );

  for (const [k, v] of [

    ["key", key],

    ["workflowName", workflowName],

    ["workflowMode", workflowMode],

  ]) {

    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();

}