application tier

`application-notifications`

Forge notifications module — thin wrapper around domain-notifications. Sprint 57 prerequisite for application-tickets.

Forge notifications module — thin wrapper around domain-notifications. Sprint 57 prerequisite for application-tickets.

Tier	application
Role	unclassified (baselined)
Path	`crates/application/notifications`
Edition	2024
Targets	application_notifications, pg_forge_notifications
Public items	23 across 4 modules
Tests	4

What it is for

application-notifications — Layer 3 module for notifications.

Thin wrapper around domain-notifications. Extracted from rust-cms-engine in sprint 57 as a prerequisite for application-tickets (tickets fire notifications on state transitions).

B-009: before this, migrations() returned Vec::new() and migrate_pending returned Ok(0) while ignoring the pool, so notifications/notification_templates/notification_preferences/ delivery_attempts (plus the unread-count/channel-enabled helper functions and RLS policies, crates/domain/notifications/migrations/001_notifications_init.sql) were never created by anything that actually called this module's own migration path. All four tables are self-contained (FKs stay inside this library crate's own schema — recipient_party_id/party_id are bare UUIDs, not constraints), so migrate_pending needs no cross-module bootstrap. Mirrors application-encounters's and application-calendar's pattern exactly.

Capabilities

`NotificationsModule`

application-notifications — Layer 3 module for notifications.

Item
`pub struct NotificationsModule`
`NotificationsModule :: fn new() -> Self`
`NotificationsModule :: fn name(& self) -> & 'static str`
`NotificationsModule :: fn version(& self) -> & 'static str`
`NotificationsModule :: fn migrations(& self) -> Vec <MigrationSet>`
`NotificationsModule :: async fn migrate_pending(& self, pool : & PgPool) -> Result <u32, MigrationError>`
`NotificationsModule :: fn permission_codes(& self) -> Vec <String>`

`api (other)`

HTTP API routers for application-notifications.

Item
`fn admin_router <S>() -> Router <S> where S : Clone + Send + Sync + 'static, PgPool : FromRef <S>,`

`api::notifications_admin (other)`

Notifications admin REST router.

Item
`fn router <S>() -> Router <S> where S : Clone + Send + Sync + 'static, PgPool : FromRef <S>,`

`ListQuery`

Notifications admin REST router.

Item
`pub struct ListQuery`

`MarkAllReadInput`

Notifications admin REST router.

Item
`pub struct MarkAllReadInput`

`PreferencesQuery`

Notifications admin REST router.

Item
`pub struct PreferencesQuery`

`UnreadCountQuery`

Notifications admin REST router.

Item
`pub struct UnreadCountQuery`

`UpdatePreferenceInput`

Notifications admin REST router.

Item
`pub struct UpdatePreferenceInput`

`services::notifications (other)`

Notifications service — thin wrapper around

Item
`async fn list(pool : & PgPool, tenant_id : Uuid, party_id : Uuid, limit : i64, offset : i64,) -> Result <Vec <Notification>, NotificationError>`
`async fn list_unread(pool : & PgPool, tenant_id : Uuid, party_id : Uuid,) -> Result <Vec <Notification>, NotificationError>`
`async fn count_unread(pool : & PgPool, tenant_id : Uuid, party_id : Uuid,) -> Result <i64, NotificationError>`
`async fn get(pool : & PgPool, id : Uuid) -> Result <Option <Notification>, NotificationError>`
`async fn mark_read(pool : & PgPool, id : Uuid) -> Result <bool, NotificationError>`
`async fn mark_all_read(pool : & PgPool, tenant_id : Uuid, party_id : Uuid,) -> Result <i64, NotificationError>`
`async fn get_preferences(pool : & PgPool, party_id : Uuid, tenant_id : Uuid,) -> Result <Vec <NotificationPreference>, NotificationError>`
`async fn update_preferences(pool : & PgPool, party_id : Uuid, tenant_id : Uuid, channel : NotificationChannel, event_type : Option <String>, enabled : bool,) -> Result <NotificationPreference, NotificationError>`
`async fn create_for_party(pool : & PgPool, tenant_id : Uuid, recipient_party_id : Uuid, event_type : impl Into <String>, title : impl Into <String>, body : impl Into <String>, entity_type : Option <& str>, entity_id : Option <Uuid>, idempotency_key : Option <String>,) -> Result <Notification, NotificationError>`

How to use it

No examples/ target and no doctest in this crate's rustdoc. The tests listed under Verification are the closest executable usage.

Module structure

application_notifications

api
api::notifications_admin
services
services::notifications

flowchart TD
  n_application_notifications["application_notifications"]
  n_application_notifications --> n_api["api"]
  n_api --> n_api__notifications_admin["notifications_admin"]
  n_application_notifications --> n_services["services"]
  n_services --> n_services__notifications["notifications"]

Public surface

`crate root`

Item	What it is
`pub struct NotificationsModule`	—
`NotificationsModule :: fn new() -> Self`	—
`NotificationsModule :: fn name(& self) -> & 'static str`	—
`NotificationsModule :: fn version(& self) -> & 'static str`	—
`NotificationsModule :: fn migrations(& self) -> Vec <MigrationSet>`	—
`NotificationsModule :: async fn migrate_pending(& self, pool : & PgPool) -> Result <u32, MigrationError>`	—
`NotificationsModule :: fn permission_codes(& self) -> Vec <String>`	sprint-3.7 S1 T3 — the permission vocabulary this module's admin router expects a host to enforce

`api`

Item	What it is
`fn admin_router <S>() -> Router <S> where S : Clone + Send + Sync + 'static, PgPool : FromRef <S>,`	Admin router composing all notifications admin sub-routers.

`api::notifications_admin`

Item	What it is
`pub struct ListQuery`	—
`pub struct UnreadCountQuery`	—
`pub struct MarkAllReadInput`	—
`pub struct PreferencesQuery`	—
`pub struct UpdatePreferenceInput`	—
`fn router <S>() -> Router <S> where S : Clone + Send + Sync + 'static, PgPool : FromRef <S>,`	—

`services::notifications`

Item	What it is
`async fn list(pool : & PgPool, tenant_id : Uuid, party_id : Uuid, limit : i64, offset : i64,) -> Result <Vec <Notification>, NotificationError>`	—
`async fn list_unread(pool : & PgPool, tenant_id : Uuid, party_id : Uuid,) -> Result <Vec <Notification>, NotificationError>`	—
`async fn count_unread(pool : & PgPool, tenant_id : Uuid, party_id : Uuid,) -> Result <i64, NotificationError>`	—
`async fn get(pool : & PgPool, id : Uuid) -> Result <Option <Notification>, NotificationError>`	—
`async fn mark_read(pool : & PgPool, id : Uuid) -> Result <bool, NotificationError>`	—
`async fn mark_all_read(pool : & PgPool, tenant_id : Uuid, party_id : Uuid,) -> Result <i64, NotificationError>`	—
`async fn get_preferences(pool : & PgPool, party_id : Uuid, tenant_id : Uuid,) -> Result <Vec <NotificationPreference>, NotificationError>`	—
`async fn update_preferences(pool : & PgPool, party_id : Uuid, tenant_id : Uuid, channel : NotificationChannel, event_type : Option <String>, enabled : bool,) -> Result <NotificationPreference, NotificationError>`	—
`async fn create_for_party(pool : & PgPool, tenant_id : Uuid, recipient_party_id : Uuid, event_type : impl Into <String>, title : impl Into <String>, body : impl Into <String>, entity_type : Option <& str>, entity_id : Option <Uuid>, idempotency_key : Option <String>,) -> Result <Notification, NotificationError>`	Create an in-app notification for a specific party

No pub use re-exports: every item above is declared in this crate.

Boundary

Reaches into domain, platform.

Shares tier application with 120 other crates: application-agreements, application-ai, application-analytics, application-approvals, application-assessments, application-audit-log, application-auth, application-billing, … (120 total).

_What this crate deliberately does NOT own is a judgment. No committed registry records one for it, so none is stated here._

Where it sits

Tier (ontology)	`application`
Architectural role (taxonomy)	`unclassified (baselined)`
Location	`crates/application/notifications`
Vocabulary in force (lexicon)	`current`

Tier flow. Which tiers this crate's own edges cross.

flowchart LR
  n_application["application"] --> n_domain["domain"]
  n_application["application"] --> n_platform["platform"]

Dependencies

Runtime, in this workspace.

Crate	Tier	Optional	Only on
`application-core`	application	no	always
`domain-notifications`	domain	no	always
`platform-dto`	platform	no	always

Runtime, from outside the workspace.

Crate	Requirement	Features	Optional	Only on
`async-trait`	`^0.1`	—	no	always
`axum`	`^0.7`	`multipart`	no	always
`serde`	`^1`	`derive`	no	always
`serde_json`	`^1`	—	no	always
`sqlx`	`^0.8`	`runtime-tokio`, `postgres`, `chrono`, `uuid`, `json`	no	always
`thiserror`	`^2`	—	no	always
`uuid`	`^1`	`v4`, `v7`, `serde`, `js`	no	always

Development, from outside the workspace.

Crate	Requirement	Features	Optional	Only on
`tokio`	`^1`	`full`	no	always

Build. None.

Depended on by. 2 workspace crates.

Signal flow — what reaches this crate, and what it reaches.

flowchart LR
  n_application_dlp["application-dlp"] -->|uses| SELF
  n_application_tickets["application-tickets"] -->|uses| SELF
  SELF["application-notifications"]
  SELF -->|runtime| n_application_core["application-core"]
  SELF -->|runtime| n_domain_notifications["domain-notifications"]
  SELF -->|runtime| n_platform_dto["platform-dto"]
  classDef self fill:#1f883d,stroke:#1f883d,color:#fff;
  class SELF self;

Feature flags

No Cargo features are defined: every capability is unconditional, so no consumer can receive a half-wired crate.

Targets

Kind	Name	Source
lib	`application_notifications`	`src/lib.rs`
test	`pg_forge_notifications`	`tests/pg_forge_notifications.rs`

Error model

No public error type was detected: no public item declares a type named *Error, and no public signature returns one.

Operational characteristics

Property	Evidence
async public surface	yes
async runtime	none detected
database access	yes
network I/O	yes
unsafe code	none detected
environment variables	yes

No unsafe block, unsafe fn, unsafe impl or unsafe trait was found by the parser anywhere in this crate's source.

Configuration

Variable	Read in
`CARGO_PKG_VERSION`	`src/lib.rs`

2 workspace crates depend on this one: application-dlp, application-tickets.

Verification

Kind	Count
Unit tests	3
Integration tests	1
Examples	0
Doctests	0

Evidence by module. How often each public module is named by something executable.

Module	Tests	Examples	Consumers
`crate root`	1	0	0
`api`	1	0	2
`api::notifications_admin`	6	0	1
`services::notifications`	9	0	5

What the tests establish, by name:

migrate_pending_creates_notifications_table — tests/pg_forge_notifications.rs
declares_a_read_and_a_write_permission_code — src/lib.rs
declares_no_code_without_a_route_behind_it — src/lib.rs
test_module_migrations_non_empty — src/lib.rs

Documentation coverage

Measure	Documented	Total
Public items with rustdoc	3	23
Public modules with a `//!` block	3	4

pie showData
    title Public items with rustdoc
    "Documented" : 3
    "No rustdoc detected" : 20

Metrics

Metric	Value
Rust source files	5
Source lines	512
Code lines	375
Public API items	23
Public modules	4
Tests	4
Examples	0
Cargo features	0
Direct runtime dependencies	10
Workspace reverse dependencies	2

pie showData
    title Public API by kind
    "function" : 11
    "method" : 6
    "struct" : 6

pie showData
    title Rust source composition
    "Code" : 375
    "Blank or comment" : 137

Generation

Rendered by tools-corpus corpus readme from repository evidence alone, renderer schema 2, lexicon current. No model, network service or database was consulted. Regenerate with tools-corpus corpus readme --write; verify with --check.

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