YouTube Search Playlist and List Items

arazzo: 1.0.1
info:
  title: YouTube Search Playlist and List Items
  summary: Search for a playlist, read its full resource, then list the videos it contains.
  description: >-
    A discovery flow for curated collections. It searches YouTube restricted to
    playlist resources, resolves the top result to a full playlist resource, and
    then lists the items inside that playlist. Every step spells out its request
    inline so the flow can be read and executed without opening the underlying
    OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: youtubeDataApi
  url: ../openapi/youtube-data-api-openapi.yml
  type: openapi
workflows:
- workflowId: search-playlist-list-items
  summary: Find a playlist by query and enumerate its items.
  description: >-
    Searches for playlists matching a query, reads the first result's playlist
    resource, and lists the items in that playlist.
  inputs:
    type: object
    required:
    - apiKey
    - query
    properties:
      apiKey:
        type: string
        description: The Google API key used to authorize each YouTube Data API request.
      query:
        type: string
        description: The query term used to find a playlist.
  steps:
  - stepId: searchPlaylists
    description: Search YouTube restricted to playlist resources and capture the first playlist id.
    operationId: youtube.search.list
    parameters:
    - name: part
      in: query
      value: snippet
    - name: q
      in: query
      value: $inputs.query
    - name: type
      in: query
      value: playlist
    - name: maxResults
      in: query
      value: 5
    - name: key
      in: query
      value: $inputs.apiKey
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      playlistId: $response.body#/items/0/id/playlistId
  - stepId: getPlaylist
    description: Read the full playlist resource for the matched id.
    operationId: youtube.playlists.list
    parameters:
    - name: part
      in: query
      value: snippet,contentDetails,status
    - name: id
      in: query
      value: $steps.searchPlaylists.outputs.playlistId
    - name: key
      in: query
      value: $inputs.apiKey
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      title: $response.body#/items/0/snippet/title
      itemCount: $response.body#/items/0/contentDetails/itemCount
  - stepId: listItems
    description: List the items contained in the matched playlist.
    operationId: youtube.playlistItems.list
    parameters:
    - name: part
      in: query
      value: snippet,contentDetails
    - name: playlistId
      in: query
      value: $steps.searchPlaylists.outputs.playlistId
    - name: maxResults
      in: query
      value: 50
    - name: key
      in: query
      value: $inputs.apiKey
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      items: $response.body#/items
  outputs:
    playlistId: $steps.searchPlaylists.outputs.playlistId
    title: $steps.getPlaylist.outputs.title
    items: $steps.listItems.outputs.items