mas_templates/
lib.rs

1// Copyright 2024, 2025 New Vector Ltd.
2// Copyright 2021-2024 The Matrix.org Foundation C.I.C.
3//
4// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
5// Please see LICENSE files in the repository root for full details.
6
7#![deny(missing_docs)]
8#![allow(clippy::module_name_repetitions)]
9
10//! Templates rendering
11
12use std::{collections::HashSet, sync::Arc};
13
14use anyhow::Context as _;
15use arc_swap::ArcSwap;
16use camino::{Utf8Path, Utf8PathBuf};
17use mas_i18n::Translator;
18use mas_router::UrlBuilder;
19use mas_spa::ViteManifest;
20use minijinja::Value;
21use rand::Rng;
22use serde::Serialize;
23use thiserror::Error;
24use tokio::task::JoinError;
25use tracing::{debug, info};
26use walkdir::DirEntry;
27
28mod context;
29mod forms;
30mod functions;
31
32#[macro_use]
33mod macros;
34
35pub use self::{
36    context::{
37        AccountInactiveContext, ApiDocContext, AppContext, CompatSsoContext, ConsentContext,
38        DeviceConsentContext, DeviceLinkContext, DeviceLinkFormField, DeviceNameContext,
39        EmailRecoveryContext, EmailVerificationContext, EmptyContext, ErrorContext,
40        FormPostContext, IndexContext, LoginContext, LoginFormField, NotFoundContext,
41        PasswordRegisterContext, PolicyViolationContext, PostAuthContext, PostAuthContextInner,
42        RecoveryExpiredContext, RecoveryFinishContext, RecoveryFinishFormField,
43        RecoveryProgressContext, RecoveryStartContext, RecoveryStartFormField, RegisterContext,
44        RegisterFormField, RegisterStepsDisplayNameContext, RegisterStepsDisplayNameFormField,
45        RegisterStepsEmailInUseContext, RegisterStepsRegistrationTokenContext,
46        RegisterStepsRegistrationTokenFormField, RegisterStepsVerifyEmailContext,
47        RegisterStepsVerifyEmailFormField, SiteBranding, SiteConfigExt, SiteFeatures,
48        TemplateContext, UpstreamExistingLinkContext, UpstreamRegister, UpstreamRegisterFormField,
49        UpstreamSuggestLink, WithCaptcha, WithCsrf, WithLanguage, WithOptionalSession, WithSession,
50    },
51    forms::{FieldError, FormError, FormField, FormState, ToFormState},
52};
53
54/// Escape the given string for use in HTML
55///
56/// It uses the same crate as the one used by the minijinja templates
57#[must_use]
58pub fn escape_html(input: &str) -> String {
59    v_htmlescape::escape(input).to_string()
60}
61
62/// Wrapper around [`minijinja::Environment`] helping rendering the various
63/// templates
64#[derive(Debug, Clone)]
65pub struct Templates {
66    environment: Arc<ArcSwap<minijinja::Environment<'static>>>,
67    translator: Arc<ArcSwap<Translator>>,
68    url_builder: UrlBuilder,
69    branding: SiteBranding,
70    features: SiteFeatures,
71    vite_manifest_path: Utf8PathBuf,
72    translations_path: Utf8PathBuf,
73    path: Utf8PathBuf,
74}
75
76/// There was an issue while loading the templates
77#[derive(Error, Debug)]
78pub enum TemplateLoadingError {
79    /// I/O error
80    #[error(transparent)]
81    IO(#[from] std::io::Error),
82
83    /// Failed to read the assets manifest
84    #[error("failed to read the assets manifest")]
85    ViteManifestIO(#[source] std::io::Error),
86
87    /// Failed to deserialize the assets manifest
88    #[error("invalid assets manifest")]
89    ViteManifest(#[from] serde_json::Error),
90
91    /// Failed to load the translations
92    #[error("failed to load the translations")]
93    Translations(#[from] mas_i18n::LoadError),
94
95    /// Failed to traverse the filesystem
96    #[error("failed to traverse the filesystem")]
97    WalkDir(#[from] walkdir::Error),
98
99    /// Encountered non-UTF-8 path
100    #[error("encountered non-UTF-8 path")]
101    NonUtf8Path(#[from] camino::FromPathError),
102
103    /// Encountered non-UTF-8 path
104    #[error("encountered non-UTF-8 path")]
105    NonUtf8PathBuf(#[from] camino::FromPathBufError),
106
107    /// Encountered invalid path
108    #[error("encountered invalid path")]
109    InvalidPath(#[from] std::path::StripPrefixError),
110
111    /// Some templates failed to compile
112    #[error("could not load and compile some templates")]
113    Compile(#[from] minijinja::Error),
114
115    /// Could not join blocking task
116    #[error("error from async runtime")]
117    Runtime(#[from] JoinError),
118
119    /// There are essential templates missing
120    #[error("missing templates {missing:?}")]
121    MissingTemplates {
122        /// List of missing templates
123        missing: HashSet<String>,
124        /// List of templates that were loaded
125        loaded: HashSet<String>,
126    },
127}
128
129fn is_hidden(entry: &DirEntry) -> bool {
130    entry
131        .file_name()
132        .to_str()
133        .is_some_and(|s| s.starts_with('.'))
134}
135
136impl Templates {
137    /// Load the templates from the given config
138    ///
139    /// # Errors
140    ///
141    /// Returns an error if the templates could not be loaded from disk.
142    #[tracing::instrument(
143        name = "templates.load",
144        skip_all,
145        fields(%path),
146    )]
147    pub async fn load(
148        path: Utf8PathBuf,
149        url_builder: UrlBuilder,
150        vite_manifest_path: Utf8PathBuf,
151        translations_path: Utf8PathBuf,
152        branding: SiteBranding,
153        features: SiteFeatures,
154    ) -> Result<Self, TemplateLoadingError> {
155        let (translator, environment) = Self::load_(
156            &path,
157            url_builder.clone(),
158            &vite_manifest_path,
159            &translations_path,
160            branding.clone(),
161            features,
162        )
163        .await?;
164        Ok(Self {
165            environment: Arc::new(ArcSwap::new(environment)),
166            translator: Arc::new(ArcSwap::new(translator)),
167            path,
168            url_builder,
169            vite_manifest_path,
170            translations_path,
171            branding,
172            features,
173        })
174    }
175
176    async fn load_(
177        path: &Utf8Path,
178        url_builder: UrlBuilder,
179        vite_manifest_path: &Utf8Path,
180        translations_path: &Utf8Path,
181        branding: SiteBranding,
182        features: SiteFeatures,
183    ) -> Result<(Arc<Translator>, Arc<minijinja::Environment<'static>>), TemplateLoadingError> {
184        let path = path.to_owned();
185        let span = tracing::Span::current();
186
187        // Read the assets manifest from disk
188        let vite_manifest = tokio::fs::read(vite_manifest_path)
189            .await
190            .map_err(TemplateLoadingError::ViteManifestIO)?;
191
192        // Parse it
193        let vite_manifest: ViteManifest =
194            serde_json::from_slice(&vite_manifest).map_err(TemplateLoadingError::ViteManifest)?;
195
196        let translations_path = translations_path.to_owned();
197        let translator =
198            tokio::task::spawn_blocking(move || Translator::load_from_path(&translations_path))
199                .await??;
200        let translator = Arc::new(translator);
201
202        debug!(locales = ?translator.available_locales(), "Loaded translations");
203
204        let (loaded, mut env) = tokio::task::spawn_blocking(move || {
205            span.in_scope(move || {
206                let mut loaded: HashSet<_> = HashSet::new();
207                let mut env = minijinja::Environment::new();
208                let root = path.canonicalize_utf8()?;
209                info!(%root, "Loading templates from filesystem");
210                for entry in walkdir::WalkDir::new(&root)
211                    .min_depth(1)
212                    .into_iter()
213                    .filter_entry(|e| !is_hidden(e))
214                {
215                    let entry = entry?;
216                    if entry.file_type().is_file() {
217                        let path = Utf8PathBuf::try_from(entry.into_path())?;
218                        let Some(ext) = path.extension() else {
219                            continue;
220                        };
221
222                        if ext == "html" || ext == "txt" || ext == "subject" {
223                            let relative = path.strip_prefix(&root)?;
224                            debug!(%relative, "Registering template");
225                            let template = std::fs::read_to_string(&path)?;
226                            env.add_template_owned(relative.as_str().to_owned(), template)?;
227                            loaded.insert(relative.as_str().to_owned());
228                        }
229                    }
230                }
231
232                Ok::<_, TemplateLoadingError>((loaded, env))
233            })
234        })
235        .await??;
236
237        env.add_global("branding", Value::from_object(branding));
238        env.add_global("features", Value::from_object(features));
239
240        self::functions::register(
241            &mut env,
242            url_builder,
243            vite_manifest,
244            Arc::clone(&translator),
245        );
246
247        let env = Arc::new(env);
248
249        let needed: HashSet<_> = TEMPLATES.into_iter().map(ToOwned::to_owned).collect();
250        debug!(?loaded, ?needed, "Templates loaded");
251        let missing: HashSet<_> = needed.difference(&loaded).cloned().collect();
252
253        if missing.is_empty() {
254            Ok((translator, env))
255        } else {
256            Err(TemplateLoadingError::MissingTemplates { missing, loaded })
257        }
258    }
259
260    /// Reload the templates on disk
261    ///
262    /// # Errors
263    ///
264    /// Returns an error if the templates could not be reloaded from disk.
265    #[tracing::instrument(
266        name = "templates.reload",
267        skip_all,
268        fields(path = %self.path),
269    )]
270    pub async fn reload(&self) -> Result<(), TemplateLoadingError> {
271        let (translator, environment) = Self::load_(
272            &self.path,
273            self.url_builder.clone(),
274            &self.vite_manifest_path,
275            &self.translations_path,
276            self.branding.clone(),
277            self.features,
278        )
279        .await?;
280
281        // Swap them
282        self.environment.store(environment);
283        self.translator.store(translator);
284
285        Ok(())
286    }
287
288    /// Get the translator
289    #[must_use]
290    pub fn translator(&self) -> Arc<Translator> {
291        self.translator.load_full()
292    }
293}
294
295/// Failed to render a template
296#[derive(Error, Debug)]
297pub enum TemplateError {
298    /// Missing template
299    #[error("missing template {template:?}")]
300    Missing {
301        /// The name of the template being rendered
302        template: &'static str,
303
304        /// The underlying error
305        #[source]
306        source: minijinja::Error,
307    },
308
309    /// Failed to render the template
310    #[error("could not render template {template:?}")]
311    Render {
312        /// The name of the template being rendered
313        template: &'static str,
314
315        /// The underlying error
316        #[source]
317        source: minijinja::Error,
318    },
319}
320
321register_templates! {
322    /// Render the not found fallback page
323    pub fn render_not_found(WithLanguage<NotFoundContext>) { "pages/404.html" }
324
325    /// Render the frontend app
326    pub fn render_app(WithLanguage<AppContext>) { "app.html" }
327
328    /// Render the Swagger API reference
329    pub fn render_swagger(ApiDocContext) { "swagger/doc.html" }
330
331    /// Render the Swagger OAuth callback page
332    pub fn render_swagger_callback(ApiDocContext) { "swagger/oauth2-redirect.html" }
333
334    /// Render the login page
335    pub fn render_login(WithLanguage<WithCsrf<LoginContext>>) { "pages/login.html" }
336
337    /// Render the registration page
338    pub fn render_register(WithLanguage<WithCsrf<RegisterContext>>) { "pages/register/index.html" }
339
340    /// Render the password registration page
341    pub fn render_password_register(WithLanguage<WithCsrf<WithCaptcha<PasswordRegisterContext>>>) { "pages/register/password.html" }
342
343    /// Render the email verification page
344    pub fn render_register_steps_verify_email(WithLanguage<WithCsrf<RegisterStepsVerifyEmailContext>>) { "pages/register/steps/verify_email.html" }
345
346    /// Render the email in use page
347    pub fn render_register_steps_email_in_use(WithLanguage<RegisterStepsEmailInUseContext>) { "pages/register/steps/email_in_use.html" }
348
349    /// Render the display name page
350    pub fn render_register_steps_display_name(WithLanguage<WithCsrf<RegisterStepsDisplayNameContext>>) { "pages/register/steps/display_name.html" }
351
352    /// Render the registration token page
353    pub fn render_register_steps_registration_token(WithLanguage<WithCsrf<RegisterStepsRegistrationTokenContext>>) { "pages/register/steps/registration_token.html" }
354
355    /// Render the client consent page
356    pub fn render_consent(WithLanguage<WithCsrf<WithSession<ConsentContext>>>) { "pages/consent.html" }
357
358    /// Render the policy violation page
359    pub fn render_policy_violation(WithLanguage<WithCsrf<WithSession<PolicyViolationContext>>>) { "pages/policy_violation.html" }
360
361    /// Render the legacy SSO login consent page
362    pub fn render_sso_login(WithLanguage<WithCsrf<WithSession<CompatSsoContext>>>) { "pages/sso.html" }
363
364    /// Render the home page
365    pub fn render_index(WithLanguage<WithCsrf<WithOptionalSession<IndexContext>>>) { "pages/index.html" }
366
367    /// Render the account recovery start page
368    pub fn render_recovery_start(WithLanguage<WithCsrf<RecoveryStartContext>>) { "pages/recovery/start.html" }
369
370    /// Render the account recovery start page
371    pub fn render_recovery_progress(WithLanguage<WithCsrf<RecoveryProgressContext>>) { "pages/recovery/progress.html" }
372
373    /// Render the account recovery finish page
374    pub fn render_recovery_finish(WithLanguage<WithCsrf<RecoveryFinishContext>>) { "pages/recovery/finish.html" }
375
376    /// Render the account recovery link expired page
377    pub fn render_recovery_expired(WithLanguage<WithCsrf<RecoveryExpiredContext>>) { "pages/recovery/expired.html" }
378
379    /// Render the account recovery link consumed page
380    pub fn render_recovery_consumed(WithLanguage<EmptyContext>) { "pages/recovery/consumed.html" }
381
382    /// Render the account recovery disabled page
383    pub fn render_recovery_disabled(WithLanguage<EmptyContext>) { "pages/recovery/disabled.html" }
384
385    /// Render the form used by the `form_post` response mode
386    pub fn render_form_post<T: Serialize>(WithLanguage<FormPostContext<T>>) { "form_post.html" }
387
388    /// Render the HTML error page
389    pub fn render_error(ErrorContext) { "pages/error.html" }
390
391    /// Render the email recovery email (plain text variant)
392    pub fn render_email_recovery_txt(WithLanguage<EmailRecoveryContext>) { "emails/recovery.txt" }
393
394    /// Render the email recovery email (HTML text variant)
395    pub fn render_email_recovery_html(WithLanguage<EmailRecoveryContext>) { "emails/recovery.html" }
396
397    /// Render the email recovery subject
398    pub fn render_email_recovery_subject(WithLanguage<EmailRecoveryContext>) { "emails/recovery.subject" }
399
400    /// Render the email verification email (plain text variant)
401    pub fn render_email_verification_txt(WithLanguage<EmailVerificationContext>) { "emails/verification.txt" }
402
403    /// Render the email verification email (HTML text variant)
404    pub fn render_email_verification_html(WithLanguage<EmailVerificationContext>) { "emails/verification.html" }
405
406    /// Render the email verification subject
407    pub fn render_email_verification_subject(WithLanguage<EmailVerificationContext>) { "emails/verification.subject" }
408
409    /// Render the upstream link mismatch message
410    pub fn render_upstream_oauth2_link_mismatch(WithLanguage<WithCsrf<WithSession<UpstreamExistingLinkContext>>>) { "pages/upstream_oauth2/link_mismatch.html" }
411
412    /// Render the upstream link match
413    pub fn render_upstream_oauth2_login_link(WithLanguage<WithCsrf<UpstreamExistingLinkContext>>) { "pages/upstream_oauth2/login_link.html" }
414
415    /// Render the upstream suggest link message
416    pub fn render_upstream_oauth2_suggest_link(WithLanguage<WithCsrf<WithSession<UpstreamSuggestLink>>>) { "pages/upstream_oauth2/suggest_link.html" }
417
418    /// Render the upstream register screen
419    pub fn render_upstream_oauth2_do_register(WithLanguage<WithCsrf<UpstreamRegister>>) { "pages/upstream_oauth2/do_register.html" }
420
421    /// Render the device code link page
422    pub fn render_device_link(WithLanguage<DeviceLinkContext>) { "pages/device_link.html" }
423
424    /// Render the device code consent page
425    pub fn render_device_consent(WithLanguage<WithCsrf<WithSession<DeviceConsentContext>>>) { "pages/device_consent.html" }
426
427    /// Render the 'account deactivated' page
428    pub fn render_account_deactivated(WithLanguage<WithCsrf<AccountInactiveContext>>) { "pages/account/deactivated.html" }
429
430    /// Render the 'account locked' page
431    pub fn render_account_locked(WithLanguage<WithCsrf<AccountInactiveContext>>) { "pages/account/locked.html" }
432
433    /// Render the 'account logged out' page
434    pub fn render_account_logged_out(WithLanguage<WithCsrf<AccountInactiveContext>>) { "pages/account/logged_out.html" }
435
436    /// Render the automatic device name for OAuth 2.0 client
437    pub fn render_device_name(WithLanguage<DeviceNameContext>) { "device_name.txt" }
438}
439
440impl Templates {
441    /// Render all templates with the generated samples to check if they render
442    /// properly
443    ///
444    /// # Errors
445    ///
446    /// Returns an error if any of the templates fails to render
447    pub fn check_render(
448        &self,
449        now: chrono::DateTime<chrono::Utc>,
450        rng: &mut impl Rng,
451    ) -> anyhow::Result<()> {
452        check::render_not_found(self, now, rng)?;
453        check::render_app(self, now, rng)?;
454        check::render_swagger(self, now, rng)?;
455        check::render_swagger_callback(self, now, rng)?;
456        check::render_login(self, now, rng)?;
457        check::render_register(self, now, rng)?;
458        check::render_password_register(self, now, rng)?;
459        check::render_register_steps_verify_email(self, now, rng)?;
460        check::render_register_steps_email_in_use(self, now, rng)?;
461        check::render_register_steps_display_name(self, now, rng)?;
462        check::render_register_steps_registration_token(self, now, rng)?;
463        check::render_consent(self, now, rng)?;
464        check::render_policy_violation(self, now, rng)?;
465        check::render_sso_login(self, now, rng)?;
466        check::render_index(self, now, rng)?;
467        check::render_recovery_start(self, now, rng)?;
468        check::render_recovery_progress(self, now, rng)?;
469        check::render_recovery_finish(self, now, rng)?;
470        check::render_recovery_expired(self, now, rng)?;
471        check::render_recovery_consumed(self, now, rng)?;
472        check::render_recovery_disabled(self, now, rng)?;
473        check::render_form_post::<EmptyContext>(self, now, rng)?;
474        check::render_error(self, now, rng)?;
475        check::render_email_recovery_txt(self, now, rng)?;
476        check::render_email_recovery_html(self, now, rng)?;
477        check::render_email_recovery_subject(self, now, rng)?;
478        check::render_email_verification_txt(self, now, rng)?;
479        check::render_email_verification_html(self, now, rng)?;
480        check::render_email_verification_subject(self, now, rng)?;
481        check::render_upstream_oauth2_link_mismatch(self, now, rng)?;
482        check::render_upstream_oauth2_login_link(self, now, rng)?;
483        check::render_upstream_oauth2_suggest_link(self, now, rng)?;
484        check::render_upstream_oauth2_do_register(self, now, rng)?;
485        check::render_device_link(self, now, rng)?;
486        check::render_device_consent(self, now, rng)?;
487        check::render_account_deactivated(self, now, rng)?;
488        check::render_account_locked(self, now, rng)?;
489        check::render_account_logged_out(self, now, rng)?;
490        check::render_device_name(self, now, rng)?;
491        Ok(())
492    }
493}
494
495#[cfg(test)]
496mod tests {
497    use super::*;
498
499    #[tokio::test]
500    async fn check_builtin_templates() {
501        #[allow(clippy::disallowed_methods)]
502        let now = chrono::Utc::now();
503        #[allow(clippy::disallowed_methods)]
504        let mut rng = rand::thread_rng();
505
506        let path = Utf8Path::new(env!("CARGO_MANIFEST_DIR")).join("../../templates/");
507        let url_builder = UrlBuilder::new("https://example.com/".parse().unwrap(), None, None);
508        let branding = SiteBranding::new("example.com");
509        let features = SiteFeatures {
510            password_login: true,
511            password_registration: true,
512            account_recovery: true,
513            login_with_email_allowed: true,
514        };
515        let vite_manifest_path =
516            Utf8Path::new(env!("CARGO_MANIFEST_DIR")).join("../../frontend/dist/manifest.json");
517        let translations_path =
518            Utf8Path::new(env!("CARGO_MANIFEST_DIR")).join("../../translations");
519        let templates = Templates::load(
520            path,
521            url_builder,
522            vite_manifest_path,
523            translations_path,
524            branding,
525            features,
526        )
527        .await
528        .unwrap();
529        templates.check_render(now, &mut rng).unwrap();
530    }
531}
mas_templates/lib.rs

mas_templates/
lib.rs
