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diff --git a/docs/templates.md b/docs/templates.md new file mode 100644 index 0000000000..a240f58b54 --- /dev/null +++ b/docs/templates.md @@ -0,0 +1,239 @@ +# Templates + +Synapse uses parametrised templates to generate the content of emails it sends and +webpages it shows to users. + +By default, Synapse will use the templates listed [here](https://github.com/matrix-org/synapse/tree/master/synapse/res/templates). +Server admins can configure an additional directory for Synapse to look for templates +in, allowing them to specify custom templates: + +```yaml +templates: + custom_templates_directory: /path/to/custom/templates/ +``` + +If this setting is not set, or the files named below are not found within the directory, +default templates from within the Synapse package will be used. + +Templates that are given variables when being rendered are rendered using [Jinja 2](https://jinja.palletsprojects.com/en/2.11.x/). +Templates rendered by Jinja 2 can also access two functions on top of the functions +already available as part of Jinja 2: + +```python +format_ts(value: int, format: str) -> str +``` + +Formats a timestamp in milliseconds. + +Example: `reason.last_sent_ts|format_ts("%c")` + +```python +mxc_to_http(value: str, width: int, height: int, resize_method: str = "crop") -> str +``` + +Turns a `mxc://` URL for media content into an HTTP(S) one using the homeserver's +`public_baseurl` configuration setting as the URL's base. + +Example: `message.sender_avatar_url|mxc_to_http(32,32)` + + +## Email templates + +Below are the templates Synapse will look for when generating the content of an email: + +* `notif_mail.html` and `notif_mail.txt`: The contents of email notifications of missed + events. + When rendering, this template is given the following variables: + * `user_display_name`: the display name for the user receiving the notification + * `unsubscribe_link`: the link users can click to unsubscribe from email notifications + * `summary_text`: a summary of the notification(s). The text used can be customised + by configuring the various settings in the `email.subjects` section of the + configuration file. + * `rooms`: a list of rooms containing events to include in the email. Each element is + an object with the following attributes: + * `title`: a human-readable name for the room + * `hash`: a hash of the ID of the room + * `invite`: a boolean, which is `True` if the room is an invite the user hasn't + accepted yet, `False` otherwise + * `notifs`: a list of events, or an empty list if `invite` is `True`. Each element + is an object with the following attributes: + * `link`: a `matrix.to` link to the event + * `ts`: the time in milliseconds at which the event was received + * `messages`: a list of messages containing one message before the event, the + message in the event, and one message after the event. Each element is an + object with the following attributes: + * `event_type`: the type of the event + * `is_historical`: a boolean, which is `False` if the message is the one + that triggered the notification, `True` otherwise + * `id`: the ID of the event + * `ts`: the time in milliseconds at which the event was sent + * `sender_name`: the display name for the event's sender + * `sender_avatar_url`: the avatar URL (as a `mxc://` URL) for the event's + sender + * `sender_hash`: a hash of the user ID of the sender + * `link`: a `matrix.to` link to the room + * `reason`: information on the event that triggered the email to be sent. It's an + object with the following attributes: + * `room_id`: the ID of the room the event was sent in + * `room_name`: a human-readable name for the room the event was sent in + * `now`: the current time in milliseconds + * `received_at`: the time in milliseconds at which the event was received + * `delay_before_mail_ms`: the amount of time in milliseconds Synapse always waits + before ever emailing about a notification (to give the user a chance to respond + to other push or notice the window) + * `last_sent_ts`: the time in milliseconds at which a notification was last sent + for an event in this room + * `throttle_ms`: the minimum amount of time in milliseconds between two + notifications can be sent for this room +* `password_reset.html` and `password_reset.txt`: The contents of password reset emails + sent by the homeserver. + When rendering, these templates are given a `link` variable which contains the link the + user must click in order to reset their password. +* `registration.html` and `registration.txt`: The contents of address verification emails + sent during registration. + When rendering, these templates are given a `link` variable which contains the link the + user must click in order to validate their email address. +* `add_threepid.html` and `add_threepid.txt`: The contents of address verification emails + sent when an address is added to a Matrix account. + When rendering, these templates are given a `link` variable which contains the link the + user must click in order to validate their email address. + + +## HTML page templates for registration and password reset + +Below are the templates Synapse will look for when generating pages related to +registration and password reset: + +* `password_reset_confirmation.html`: An HTML page that a user will see when they follow + the link in the password reset email. The user will be asked to confirm the action + before their password is reset. + When rendering, this template is given the following variables: + * `sid`: the session ID for the password reset + * `token`: the token for the password reset + * `client_secret`: the client secret for the password reset +* `password_reset_success.html` and `password_reset_failure.html`: HTML pages for success + and failure that a user will see when they confirm the password reset flow using the + page above. + When rendering, `password_reset_success.html` is given no variable, and + `password_reset_failure.html` is given a `failure_reason`, which contains the reason + for the password reset failure. +* `registration_success.html` and `registration_failure.html`: HTML pages for success and + failure that a user will see when they follow the link in an address verification email + sent during registration. + When rendering, `registration_success.html` is given no variable, and + `registration_failure.html` is given a `failure_reason`, which contains the reason + for the registration failure. +* `add_threepid_success.html` and `add_threepid_failure.html`: HTML pages for success and + failure that a user will see when they follow the link in an address verification email + sent when an address is added to a Matrix account. + When rendering, `add_threepid_success.html` is given no variable, and + `add_threepid_failure.html` is given a `failure_reason`, which contains the reason + for the registration failure. + + +## HTML page templates for Single Sign-On (SSO) + +Below are the templates Synapse will look for when generating pages related to SSO: + +* `sso_login_idp_picker.html`: HTML page to prompt the user to choose an + Identity Provider during login. + This is only used if multiple SSO Identity Providers are configured. + When rendering, this template is given the following variables: + * `redirect_url`: the URL that the user will be redirected to after + login. + * `server_name`: the homeserver's name. + * `providers`: a list of available Identity Providers. Each element is + an object with the following attributes: + * `idp_id`: unique identifier for the IdP + * `idp_name`: user-facing name for the IdP + * `idp_icon`: if specified in the IdP config, an MXC URI for an icon + for the IdP + * `idp_brand`: if specified in the IdP config, a textual identifier + for the brand of the IdP + The rendered HTML page should contain a form which submits its results + back as a GET request, with the following query parameters: + * `redirectUrl`: the client redirect URI (ie, the `redirect_url` passed + to the template) + * `idp`: the 'idp_id' of the chosen IDP. +* `sso_auth_account_details.html`: HTML page to prompt new users to enter a + userid and confirm other details. This is only shown if the + SSO implementation (with any `user_mapping_provider`) does not return + a localpart. + When rendering, this template is given the following variables: + * `server_name`: the homeserver's name. + * `idp`: details of the SSO Identity Provider that the user logged in + with: an object with the following attributes: + * `idp_id`: unique identifier for the IdP + * `idp_name`: user-facing name for the IdP + * `idp_icon`: if specified in the IdP config, an MXC URI for an icon + for the IdP + * `idp_brand`: if specified in the IdP config, a textual identifier + for the brand of the IdP + * `user_attributes`: an object containing details about the user that + we received from the IdP. May have the following attributes: + * display_name: the user's display_name + * emails: a list of email addresses + The template should render a form which submits the following fields: + * `username`: the localpart of the user's chosen user id +* `sso_new_user_consent.html`: HTML page allowing the user to consent to the + server's terms and conditions. This is only shown for new users, and only if + `user_consent.require_at_registration` is set. + When rendering, this template is given the following variables: + * `server_name`: the homeserver's name. + * `user_id`: the user's matrix proposed ID. + * `user_profile.display_name`: the user's proposed display name, if any. + * consent_version: the version of the terms that the user will be + shown + * `terms_url`: a link to the page showing the terms. + The template should render a form which submits the following fields: + * `accepted_version`: the version of the terms accepted by the user + (ie, 'consent_version' from the input variables). +* `sso_redirect_confirm.html`: HTML page for a confirmation step before redirecting back + to the client with the login token. + When rendering, this template is given the following variables: + * `redirect_url`: the URL the user is about to be redirected to. + * `display_url`: the same as `redirect_url`, but with the query + parameters stripped. The intention is to have a + human-readable URL to show to users, not to use it as + the final address to redirect to. + * `server_name`: the homeserver's name. + * `new_user`: a boolean indicating whether this is the user's first time + logging in. + * `user_id`: the user's matrix ID. + * `user_profile.avatar_url`: an MXC URI for the user's avatar, if any. + `None` if the user has not set an avatar. + * `user_profile.display_name`: the user's display name. `None` if the user + has not set a display name. +* `sso_auth_confirm.html`: HTML page which notifies the user that they are authenticating + to confirm an operation on their account during the user interactive authentication + process. + When rendering, this template is given the following variables: + * `redirect_url`: the URL the user is about to be redirected to. + * `description`: the operation which the user is being asked to confirm + * `idp`: details of the Identity Provider that we will use to confirm + the user's identity: an object with the following attributes: + * `idp_id`: unique identifier for the IdP + * `idp_name`: user-facing name for the IdP + * `idp_icon`: if specified in the IdP config, an MXC URI for an icon + for the IdP + * `idp_brand`: if specified in the IdP config, a textual identifier + for the brand of the IdP +* `sso_auth_success.html`: HTML page shown after a successful user interactive + authentication session. + Note that this page must include the JavaScript which notifies of a successful + authentication (see https://matrix.org/docs/spec/client_server/r0.6.0#fallback). + This template has no additional variables. +* `sso_auth_bad_user.html`: HTML page shown after a user-interactive authentication + session which does not map correctly onto the expected user. + When rendering, this template is given the following variables: + * `server_name`: the homeserver's name. + * `user_id_to_verify`: the MXID of the user that we are trying to + validate. +* `sso_account_deactivated.html`: HTML page shown during single sign-on if a deactivated + user (according to Synapse's database) attempts to login. + This template has no additional variables. +* `sso_error.html`: HTML page to display to users if something goes wrong during the + OpenID Connect authentication process. + When rendering, this template is given two variables: + * `error`: the technical name of the error + * `error_description`: a human-readable message for the error |