Invite your Pipedrive pipeline to a GoTo Webinar once each

**Objective:** Register Pipedrive contacts for the upcoming webinar named `{webinar-name}`: the people on open deals in the stage `{stage-name}`, or the people at the organization `{organization-name}`, skipping anyone already registered, only after the user confirms. The webinar's organizer key is `{organizer-key}`.

**Step 1: Find the webinar in GoTo Webinar**

Call `goto-webinar-get-webinar` with `webinar-name.contains` set to `{webinar-name}`. If it matches more than one webinar, list them and stop. If the webinar is already over, say so and stop.

**Step 2: Establish the contacts in Pipedrive**

* If `{stage-name}` is given: call `pipedrive-get-stage` with `name.contains` set to it; if more than one stage matches, list them with their pipeline and stop. Call `pipedrive-get-deal` with `stage-id` and `status` set to open. For each deal's person name, call `pipedrive-get-person` with `name` set to it; if that name matches more than one person, keep the one at the deal's organization and flag any you could not resolve.
* If `{organization-name}` is given: call `pipedrive-get-organization` with `name.contains` set to it; if more than one matches, list them and stop. Call `pipedrive-get-person` with `organization-id` set to its id.
* If both are empty, ask the user which contacts to invite and stop.

Drop anyone without an email and list them.

**Step 3: Carry each email across and skip the already registered**

For each contact, call `goto-webinar-get-registrant` with the `webinar-key` and `email` set to their email. If a registration comes back, skip them as already registered.

**Step 4: Show the plan and wait**

Show a table: person, email, organization, job title, deal (when from a stage), and the first and last name you will send. Pipedrive holds one full name, so split it at the last space; show any name you are unsure how to split. If `{organizer-key}` is empty, say that GoTo Webinar needs the webinar's organizer key to register people, that no tool returns it, and ask the user for it. Ask the user to confirm. Do not write anything until they confirm and the organizer key is known.

**Step 5: Write, then confirm**

After confirmation, call `goto-webinar-add-registrant` once per person with `webinar-key`, `organizer-key`, `first-name`, `last-name`, `email`, `organization` set to the Pipedrive organization name, `job-title` and `phone` when Pipedrive has them, and `resend-confirmation` set to false. Report each person as registered or failed, with the error for any failure.

**Rules & Guidelines:**

* `pipedrive-get-stage`, `pipedrive-get-deal`, `pipedrive-get-organization` and `pipedrive-get-person` are on the pipedrive server; `goto-webinar-get-webinar`, `goto-webinar-get-registrant` and `goto-webinar-add-registrant` are on the goto-webinar server.
* `goto-webinar-add-registrant` is the only tool that may write, once per person, and only after confirmation. It sends each person a confirmation email, so say that when asking to confirm.
* Do not call `goto-webinar-delete-registrant` or any Pipedrive add or update tool, such as `pipedrive-add-activity`, `pipedrive-add-note` or `pipedrive-update-deal`.

**Validation:**

* If every contact is already registered, say so and stop.
* Compare emails case-insensitively when checking registrations.
* If registration fails with an organizer key error, stop and ask for the correct key rather than retrying every person.