---

- name: Fail if playbook called incorrectly
  fail: msg="The `local_path_homeserver_db` variable needs to be provided to this playbook, via --extra-vars"
  when: "local_path_homeserver_db is not defined or local_path_homeserver_db.startswith('<')"

- name: Check if the provided SQLite homeserver.db file exists
  stat: path="{{ local_path_homeserver_db }}"
  delegate_to: 127.0.0.1
  become: false
  register: local_path_homeserver_db_stat

- name: Fail if provided SQLite homeserver.db file doesn't exist
  fail: msg="File cannot be found on the local machine at {{ local_path_homeserver_db }}"
  when: not local_path_homeserver_db_stat.stat.exists

- name: Ensure scratchpad directory exists
  file:
    path: "{{ matrix_scratchpad_dir }}"
    state: directory
    mode: 0755
    owner: "{{ matrix_user_username }}"
    group: "{{ matrix_user_username }}"

- name: Ensure provided SQLite homeserver.db file is copied to scratchpad directory on the server
  synchronize:
    src: "{{ local_path_homeserver_db }}"
    dest: "{{ matrix_scratchpad_dir }}/homeserver.db"

- name: Ensure matrix-postgres is stopped
  service: name=matrix-postgres state=stopped daemon_reload=yes

- name: Ensure postgres data is wiped out
  file:
    path: "{{ matrix_postgres_data_path }}"
    state: absent

- name: Ensure postgres data path exists
  file:
    path: "{{ matrix_postgres_data_path }}"
    state: directory
    mode: 0700
    owner: "{{ matrix_user_username }}"
    group: "{{ matrix_user_username }}"

- name: Ensure matrix-postgres is started
  service: name=matrix-postgres state=restarted daemon_reload=yes

- name: Wait a while, so that Postgres can manage to start
  pause: seconds=7

# If the actual migration command (below) fails, it will leave a container behind.
# Starting it again later will relaunch that one, which may or may not work.
# To ensure we're starting from a clean state, ensure any such leftovers are removed.
- name: Cleanup any old leftover migration container
  docker_container:
    name: matrix-synapse-migrate
    state: absent

- name: Importing SQLite database into Postgres
  docker_container:
    name: matrix-synapse-migrate
    image: "{{ matrix_synapse_docker_image }}"
    detach: no
    cleanup: yes
    entrypoint: /usr/local/bin/python
    command: "/usr/local/bin/synapse_port_db --sqlite-database /scratchpad/homeserver.db --postgres-config /data/homeserver.yaml"
    user: "{{ matrix_user_uid }}:{{ matrix_user_gid }}"
    volumes:
      - "{{ matrix_synapse_config_dir_path }}:/data"
      - "{{ matrix_synapse_run_path }}:/matrix-run"
      - "{{ matrix_scratchpad_dir }}:/scratchpad"
    networks:
      - name: "{{ matrix_docker_network }}"

- name: Ensure scratchpad directory is deleted
  file:
    path: "{{ matrix_scratchpad_dir }}"
    state: absent