---
# Pre-checks

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

- name: Fail if media store is on Amazon S3
  fail:
    msg: "Your media store is on Amazon S3. Due to technical limitations, restoring is not supported."
  when: matrix_s3_media_store_enabled|bool

- name: Check if the provided media store directory exists
  stat:
    path: "{{ server_path_media_store }}"
  register: server_path_media_store_stat

- name: Fail if provided media store directory doesn't exist on the server
  fail:
    msg: "{{ server_path_media_store }} cannot be found on the server"
  when: "not server_path_media_store_stat.stat.exists or not server_path_media_store_stat.stat.isdir"

- name: Check if media store contains local_content
  stat:
    path: "{{ server_path_media_store }}/local_content"
  register: server_path_media_store_local_content_stat

- name: Check if media store contains remote_content
  stat:
    path: "{{ server_path_media_store }}/remote_content"
  register: server_path_media_store_remote_content_stat

- name: Fail if media store directory doesn't look okay (lacking remote and local content)
  fail:
    msg: "{{ server_path_media_store }} contains neither local_content nor remote_content directories. It's most likely a mistake and is not a media store directory."
  when: "not server_path_media_store_local_content_stat.stat.exists and not server_path_media_store_remote_content_stat.stat.exists"

# Actual import work

- name: Ensure matrix-dendrite is stopped
  service:
    name: matrix-dendrite
    state: stopped
    daemon_reload: yes
  register: stopping_result

# This can only work with local files, not if the media store is on Amazon S3,
# as it won't be accessible in such a case.
- name: Ensure provided media store directory is synchronized
  synchronize:
    src: "{{ server_path_media_store }}/"
    dest: "{{ matrix_dendrite_media_store_path }}"
    delete: yes
    # It's wasteful to preserve owner/group now. We chown below anyway.
    owner: no
    group: no
    times: yes
  delegate_to: "{{ inventory_hostname }}"

# This is for the generic case and fails in other cases (remote file systems),
# because in such cases the base path (matrix_dendrite_media_store_path) is a mount point.
- name: Ensure media store permissions are correct (generic case)
  file:
    path: "{{ matrix_dendrite_media_store_path }}"
    owner: "{{ matrix_user_username }}"
    group: "{{ matrix_user_groupname }}"
    recurse: yes
  when: "not matrix_s3_media_store_enabled|bool"

# We don't chown for Goofys, because due to the way it's mounted,
# all files become owned by whoever needs to own them.

- name: Ensure Dendrite is started (if it previously was)
  service:
    name: "{{ item }}"
    state: started
    daemon_reload: yes
  when: "stopping_result.changed"
  with_items:
    - matrix-dendrite