17 files changed, 441 insertions, 99 deletions

diff --git a/overlays/spm/frontend/angular.json b/overlays/spm/frontend/angular.json
index cc08d665..a25bfd0b 100644
--- a/overlays/spm/frontend/angular.json
+++ b/overlays/spm/frontend/angular.json
@@ -54,7 +54,7 @@
             "assets": [
               "src/assets",
               {
-                "glob": "@(thumb_up)/baseline.svg",
+                "glob": "@(add|check|delete_forever)/baseline.svg",
                 "input": "./node_modules/@material-icons/svg/svg",
                 "output": "/icons/"
               }
diff --git a/overlays/spm/frontend/package.json b/overlays/spm/frontend/package.json
index 74010466..54a301a0 100644
--- a/overlays/spm/frontend/package.json
+++ b/overlays/spm/frontend/package.json
@@ -15,16 +15,21 @@
     "@angular/common": "~13.3.0",
     "@angular/compiler": "~13.3.0",
     "@angular/core": "~13.3.0",
+    "@angular/flex-layout": "^13.0.0-beta.38",
     "@angular/forms": "~13.3.0",
     "@angular/material": "13.3.7",
     "@angular/platform-browser": "~13.3.0",
     "@angular/platform-browser-dynamic": "~13.3.0",
     "@angular/router": "~13.3.0",
     "@fontsource/roboto": "^4.5.7",
+    "@fontsource/source-sans-pro": "^4.5.10",
     "@material-icons/svg": "^1.0.28",
+    "@types/uuid": "^8.3.4",
+    "jwt-decode": "^3.1.2",
     "ngx-webstorage": "9.0.0",
     "rxjs": "~7.5.0",
     "tslib": "^2.3.0",
+    "uuid": "^8.3.2",
     "zone.js": "~0.11.4"
   },
   "devDependencies": {
diff --git a/overlays/spm/frontend/src/app/app-routing.module.ts b/overlays/spm/frontend/src/app/app-routing.module.ts
index 2da97cea..bffe8c4d 100644
--- a/overlays/spm/frontend/src/app/app-routing.module.ts
+++ b/overlays/spm/frontend/src/app/app-routing.module.ts
@@ -1,17 +1,14 @@
 import { NgModule } from '@angular/core';
-import { RouterModule, Routes } from '@angular/router';
-
-import { SpmComponent } from './spm/spm.component';
-import { PageNotFoundComponent } from './page-not-found/page-not-found.component';
+import { RouterModule, Routes, PreloadAllModules } from '@angular/router';
 
 const routes: Routes = [
-  { path: 'spm', component: SpmComponent },
+  { path: 'spm', loadChildren: () => import('./spm/spm.module').then(m => m.SpmModule) },
   { path: '', redirectTo: '/spm', pathMatch: 'full' },
-  { path: '**', component: PageNotFoundComponent }
+  { path: '**', loadChildren: () => import('./page-not-found/page-not-found.module').then(m => m.PageNotFoundModule) }
 ];
 
 @NgModule({
-  imports: [RouterModule.forRoot(routes)],
+  imports: [RouterModule.forRoot(routes, { preloadingStrategy: PreloadAllModules })],
   exports: [RouterModule]
 })
 export class AppRoutingModule { }
diff --git a/overlays/spm/frontend/src/app/app.component.html b/overlays/spm/frontend/src/app/app.component.html
index f9b5b8fc..1a2f88b0 100644
--- a/overlays/spm/frontend/src/app/app.component.html
+++ b/overlays/spm/frontend/src/app/app.component.html
@@ -1,7 +1,21 @@
-<mat-toolbar color="primary">
-  <div>
-    <a mat-button routerLink="/spm" routerLinkActive="active">spm</a>
-  </div>
-</mat-toolbar>
-<!-- The routed views render in the <router-outlet> -->
-<router-outlet></router-outlet>
+<div gdAreas="nav | content" gdRows="min-content 1fr" style="min-height: 100vh">
+   <mat-toolbar color="primary" gdArea="nav" fxLayout="flex" fxLayoutGap="16px">
+     <div>
+       <span class="mono" [innerHTML]="apiDomain$ | async"></span>
+     </div>
+     <div>
+       <a mat-button routerLink="/spm" routerLinkActive="active">spm</a>
+     </div>
+   </mat-toolbar>
+   <!-- The routed views render in the <router-outlet> -->
+   <ng-template #router_loading_indicator>
+     <div gdArea="content" fxLayout="column" fxLayoutAlign="center stretch">
+       <div fxFlex="none" fxFlexAlign="center">
+         <mat-spinner></mat-spinner>
+       </div>
+     </div>
+   </ng-template>
+   <div class="content" gdArea="content" *ngIf="!(routerLoading$ | async); else router_loading_indicator">
+     <router-outlet></router-outlet>
+   </div>
+</div>
diff --git a/overlays/spm/frontend/src/app/app.component.sass b/overlays/spm/frontend/src/app/app.component.sass
index e69de29b..4732ea49 100644
--- a/overlays/spm/frontend/src/app/app.component.sass
+++ b/overlays/spm/frontend/src/app/app.component.sass
@@ -0,0 +1,2 @@
+.content
+  padding: 16px
diff --git a/overlays/spm/frontend/src/app/app.component.ts b/overlays/spm/frontend/src/app/app.component.ts
index 7c231203..11c0f772 100644
--- a/overlays/spm/frontend/src/app/app.component.ts
+++ b/overlays/spm/frontend/src/app/app.component.ts
@@ -1,6 +1,18 @@
-import { Component, OnInit, OnDestroy } from '@angular/core';
+import { Component, OnInit, OnDestroy, Inject, Renderer2, RendererFactory2 } from '@angular/core';
+import { DOCUMENT } from '@angular/common';
+import { MediaMatcher } from '@angular/cdk/layout';
+import { LocalStorage } from 'ngx-webstorage';
+import { BehaviorSubject, Subscription, Subject } from 'rxjs';
+import { Router, RouterEvent, NavigationStart, NavigationEnd, NavigationCancel, NavigationError } from '@angular/router';
+import { HttpClient, HttpHeaders } from '@angular/common/http';
 
-import { ColorSchemeService } from './color-scheme.service';
+import { map, filter } from 'rxjs/operators';
+
+type ColorScheme = 'dark' | 'light';
+
+export interface DomainResponse {
+  domain: string;
+}
 
 @Component({
   selector: 'app-root',
@@ -8,14 +20,81 @@ import { ColorSchemeService } from './color-scheme.service';
   styleUrls: ['./app.component.sass']
 })
 export class AppComponent implements OnInit, OnDestroy {
+  private renderer: Renderer2;
+  colorSchemeMatcher: MediaQueryList;
+
   title = 'spm-frontend';
 
-  constructor(private colorSchemeService: ColorSchemeService) {}
+  public activeColorScheme$: BehaviorSubject<ColorScheme> = new BehaviorSubject<ColorScheme>('dark');
+
+  @LocalStorage('prefers-color-scheme')
+  public colorSchemeOverride?: ColorScheme;
+
+  colorSchemeSubscription?: Subscription;
+
+  router: Router;
+  public routerLoading$: Subject<boolean> = new Subject<boolean>();
+  routerEventSubscription?: Subscription;
+
+  http: HttpClient;
+  apiDomain$: Subject<string> = new Subject<string>();
+
+  constructor( rendererFactory: RendererFactory2,
+               mediaMatcher: MediaMatcher,
+               @Inject(DOCUMENT) private document: Document,
+               router: Router,
+               http: HttpClient,
+             ) {
+    this.renderer = rendererFactory.createRenderer(null, null);
+    this.colorSchemeMatcher = mediaMatcher.matchMedia('(prefers-color-scheme: dark)');
+    this.document = document;
+
+    this.colorSchemeListener = this.colorSchemeListener.bind(this);
+    this.colorSchemeMatcher.addEventListener('change', this.colorSchemeListener);
+    this.activeColorScheme$.next(this.getColorScheme());
+
+    this.router = router;
+    this.http = http;
+  }
+
+  private colorSchemeListener(event: { matches: boolean; }) {
+    this.activeColorScheme$.next(this.getColorScheme(event));
+  }
+
+  private getColorScheme(event?: { matches: boolean; }): ColorScheme {
+    if (this.colorSchemeOverride) {
+      return this.colorSchemeOverride;
+    } else if (event) {
+      return event.matches ? 'dark' : 'light';
+    } else {
+      return this.colorSchemeMatcher.matches ? 'dark' : 'light';
+    }
+  }
+
+  updateColorScheme(scheme: ColorScheme) {
+    this.colorSchemeOverride = scheme;
+    this.activeColorScheme$.next(scheme);
+  }
 
   ngOnInit() {
-    this.colorSchemeService.init();
+    this.colorSchemeSubscription = this.activeColorScheme$.subscribe(scheme => { this.renderer.setAttribute(this.document.body, 'data-color-scheme', scheme); });
+
+    this.routerEventSubscription = this.router.events.pipe(
+      filter(event =>
+        event instanceof NavigationStart ||
+        event instanceof NavigationEnd ||
+        event instanceof NavigationCancel ||
+        event instanceof NavigationError
+            ),
+      map(event => event instanceof NavigationStart)
+    ).subscribe(this.routerLoading$);
+
+    this.http.get<DomainResponse>('/domain', { headers: new HttpHeaders({ 'Accept': 'application/json' }) }).pipe(map((resp: DomainResponse) => resp.domain)).subscribe(this.apiDomain$);
   }
   ngOnDestroy() {
-    this.colorSchemeService.destroy();
+    this.colorSchemeMatcher.removeEventListener('change', this.colorSchemeListener);
+
+    this.colorSchemeSubscription?.unsubscribe();
+    this.routerEventSubscription?.unsubscribe();
   }
 }
diff --git a/overlays/spm/frontend/src/app/app.module.ts b/overlays/spm/frontend/src/app/app.module.ts
index 914f73a2..98e5106e 100644
--- a/overlays/spm/frontend/src/app/app.module.ts
+++ b/overlays/spm/frontend/src/app/app.module.ts
@@ -1,30 +1,30 @@
 import { NgModule } from '@angular/core';
 import { BrowserModule } from '@angular/platform-browser';
+import { NgxWebstorageModule } from 'ngx-webstorage';
 
 import { AppRoutingModule } from './app-routing.module';
 import { AppComponent } from './app.component';
-import { SpmComponent } from './spm/spm.component';
-import { PageNotFoundComponent } from './page-not-found/page-not-found.component';
 import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
-import { MatIconModule } from '@angular/material/icon';
 import { HttpClientModule } from "@angular/common/http";
 import { MatToolbarModule } from '@angular/material/toolbar';
 import { MatButtonModule } from '@angular/material/button';
+import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
+import { FlexLayoutModule } from "@angular/flex-layout";
 
 @NgModule({
   declarations: [
     AppComponent,
-    SpmComponent,
-    PageNotFoundComponent
   ],
   imports: [
     BrowserModule,
+    NgxWebstorageModule.forRoot(),
     AppRoutingModule,
     BrowserAnimationsModule,
-    MatIconModule,
     HttpClientModule,
     MatToolbarModule,
-    MatButtonModule
+    MatButtonModule,
+    MatProgressSpinnerModule,
+    FlexLayoutModule,
   ],
   providers: [],
   bootstrap: [AppComponent]
diff --git a/overlays/spm/frontend/src/app/color-scheme.service.ts b/overlays/spm/frontend/src/app/color-scheme.service.ts
deleted file mode 100644
index c56e9c23..00000000
--- a/overlays/spm/frontend/src/app/color-scheme.service.ts
+++ /dev/null
@@ -1,62 +0,0 @@
-import { Injectable, Renderer2, RendererFactory2 } from '@angular/core';
-import { MediaMatcher } from '@angular/cdk/layout';
-import { LocalStorage } from 'ngx-webstorage';
-
-type ColorScheme = "dark" | "light";
-
-@Injectable({
-  providedIn: 'root'
-})
-export class ColorSchemeService {
-  private renderer: Renderer2;
-  matcher!: MediaQueryList;
-
-  @LocalStorage('prefers-color-scheme')
-  public colorSchemeOverride: ColorScheme;
-
-  public activeColorScheme: BehaviorSubject<ColorScheme> = new BehaviorSubject("light");
-
-  constructor(rendererFactory: RendererFactory2,
-              mediaMatcher: MediaMatcher
-             ) {
-    // Create new renderer from renderFactory, to make it possible to use renderer2 in a service
-    this.renderer = rendererFactory.createRenderer(null, null);
-    this.matcher = mediaMatcher.matchMedia('(prefers-color-scheme: dark)');
-
-    this._listener = this._listener.bind(this);
-  }
-
-  init() {
-    this.matcher.addEventListener('change', this._listener);
-    this.load();
-  }
-
-  _listener(event: { matches: any; }) {
-    this.activeColorScheme.next(event.matches ? 'dark' : 'light');
-  }
-
-  destroy() {
-    this.matcher.removeEventListener('change', this._listener);
-  }
-
-  _getColorScheme() {
-    if (this.colorSchemeOverride) {
-      this.colorSchemeOverride
-    } else {
-      this.matcher.matches ? 'dark' : 'light'
-    }
-  }
-
-  load() {
-    this.activeColorScheme.next(this._getColorScheme());
-  }
-
-  update(scheme: ColorScheme) {
-    this.colorSchemeOverride = scheme;
-    this.activeColorScheme.next(scheme);
-  }
-
-  currentActive() {
-    return this.colorScheme;
-  }
-}
diff --git a/overlays/spm/frontend/src/app/page-not-found/page-not-found.module.ts b/overlays/spm/frontend/src/app/page-not-found/page-not-found.module.ts
new file mode 100644
index 00000000..b9d8945c
--- /dev/null
+++ b/overlays/spm/frontend/src/app/page-not-found/page-not-found.module.ts
@@ -0,0 +1,16 @@
+import { NgModule } from '@angular/core';
+import { PageNotFoundComponent } from './page-not-found.component';
+import { RouterModule } from '@angular/router';
+
+@NgModule({
+  declarations: [PageNotFoundComponent],
+  exports: [PageNotFoundComponent],
+  imports: [
+    RouterModule.forChild([{
+      path: '',
+      pathMatch: 'full',
+      component: PageNotFoundComponent
+    }]),
+  ]
+})
+export class PageNotFoundModule {}
diff --git a/overlays/spm/frontend/src/app/spm/spm.component.html b/overlays/spm/frontend/src/app/spm/spm.component.html
index d1339d95..5d0e625a 100644
--- a/overlays/spm/frontend/src/app/spm/spm.component.html
+++ b/overlays/spm/frontend/src/app/spm/spm.component.html
@@ -1,3 +1,33 @@
-<p>spm works!</p>
+<div id="mail-panel-container" fxLayout="row wrap" style="gap: 16px">
+  <ng-template ngFor [ngForOf]="spmMails$ | async | keyvalue: asIsOrder" let-entry>
+    <mat-card>
+      <mat-card-title class="mono" *ngIf="entry.value.state !== 'loading'">{{entry.value.local}}</mat-card-title>
+      <mat-card-subtitle class="mono" *ngIf="entry.value.state !== 'loading'">@{{entry.value.domain}}</mat-card-subtitle>
+      <mat-card-content *ngIf="entry.value.state === 'loading'">
+        <mat-spinner style="margin: auto"></mat-spinner>
+      </mat-card-content>
+      <mat-card-actions>
+        <button mat-raised-button color="primary" (click)="claim(entry.key)" [disabled]="entry.value.state === 'loaded' || entry.value.state === 'claiming' ? null : true">
+          <mat-icon aria-hidden="false" aria-label="Claim" svgIcon="check"></mat-icon>
+          <span *ngIf="entry.value.state !== 'claimed'">Claim</span>
+          <span *ngIf="entry.value.state === 'claimed'">Claimed</span>
+        </button>
+        <button mat-stroked-button color="warn" (click)="forget(entry.key)">
+          <mat-icon aria-hidden="false" aria-label="Forget" svgIcon="delete_forever"></mat-icon>
+          <span *ngIf="entry.value.state !== 'claimed'">Forget</span>
+          <span *ngIf="entry.value.state === 'claimed'">Hide</span>
+        </button>
+      </mat-card-actions>
+      <mat-card-footer *ngIf="entry.value.state === 'loaded' && entry.value.percent_expiration">
+        <mat-progress-bar mode="determinate" [value]="entry.value.percent_expiration"></mat-progress-bar>
+      </mat-card-footer>
+      <mat-card-footer *ngIf="entry.value.state === 'claiming'">
+        <mat-progress-bar mode="indeterminate"></mat-progress-bar>
+      </mat-card-footer>
+    </mat-card>
+  </ng-template>
+</div>
 
-<mat-icon aria-hidden="false" aria-label="Thumbs up" svgIcon="thumb_up"></mat-icon>
+<button id="add-button" mat-fab color="accent" (click)="add()">
+  <mat-icon aria-hidden="false" aria-label="Add" svgIcon="add"></mat-icon>
+</button>
diff --git a/overlays/spm/frontend/src/app/spm/spm.component.sass b/overlays/spm/frontend/src/app/spm/spm.component.sass
index e69de29b..bda4dd4a 100644
--- a/overlays/spm/frontend/src/app/spm/spm.component.sass
+++ b/overlays/spm/frontend/src/app/spm/spm.component.sass
@@ -0,0 +1,13 @@
+#add-button
+  position: fixed
+  bottom: 16px
+  right: 16px
+
+#mail-panel-container
+  margin-bottom: 88px
+
+.mat-card
+  overflow: hidden
+
+.mat-card-footer
+  margin: -16px
diff --git a/overlays/spm/frontend/src/app/spm/spm.component.ts b/overlays/spm/frontend/src/app/spm/spm.component.ts
index 7d172052..f0655b55 100644
--- a/overlays/spm/frontend/src/app/spm/spm.component.ts
+++ b/overlays/spm/frontend/src/app/spm/spm.component.ts
@@ -1,24 +1,193 @@
-import { Component, OnInit } from '@angular/core';
+import { Component, OnInit, OnDestroy } from '@angular/core';
 import { MatIconRegistry, MatIconModule } from '@angular/material/icon';
 import { DomSanitizer } from "@angular/platform-browser";
+import { BehaviorSubject, interval, Subscription, catchError, throwError } from 'rxjs';
+import { HttpClient, HttpHeaders, HttpErrorResponse, HttpResponse } from '@angular/common/http';
+
+import { v4 as uuidv4 } from 'uuid';
+import jwtDecode, { JwtPayload } from "jwt-decode";
+
+import { map, withLatestFrom } from 'rxjs/operators';
+
+export interface LoadingSpmMail {
+  state: "loading";
+}
+
+export interface LoadedSpmMail {
+  state: "loaded" | "claiming";
+  local: string;
+  domain: string;
+  jwt: string;
+  start?: Date;
+  expiration?: Date;
+  percent_expiration?: number;
+}
+
+export interface ExpiredSpmMail {
+  state: "expired";
+  local: string;
+  domain: string;
+}
+
+export interface ClaimedSpmMail {
+  state: "claimed";
+  local: string;
+  domain: string;
+}
+
+export interface SpmJwtUnregisteredPayload {
+  local: string;
+}
+
+type SpmJwtPayload = JwtPayload & SpmJwtUnregisteredPayload;
+
+export type SpmMail = LoadingSpmMail | LoadedSpmMail | ClaimedSpmMail | ExpiredSpmMail;
+
+function percentExpiration(start: Date, exp: Date, now?: Date) {
+  if (!now) {
+    now = new Date();
+  }
+
+  if (now < start) {
+    return 100;
+  } else if (exp < now) {
+    return 0;
+  } else {
+    const length = exp.getTime() - start.getTime();
+    const diff = exp.getTime() - now.getTime();
+    return 100 * (diff / length);
+  }
+}
+
+function updateSpmExpiration(value: SpmMail): SpmMail {
+  if (value.state === 'loaded') {
+    const percent_expiration = value.expiration && value.start ? percentExpiration(value.start, value.expiration) : undefined;
+    if (percent_expiration !== undefined && percent_expiration <= 0) {
+      return {state: "expired", local: value.local, domain: value.domain};
+    } else {
+      return {...value, percent_expiration: percent_expiration}
+    }
+  } else {
+    return value;
+  }
+}
 
 @Component({
   selector: 'app-spm',
   templateUrl: './spm.component.html',
   styleUrls: ['./spm.component.sass']
 })
-export class SpmComponent implements OnInit {
+export class SpmComponent implements OnInit, OnDestroy {
+  spmMails$: BehaviorSubject<Map<string, SpmMail>> = new BehaviorSubject(new Map());
+  http: HttpClient;
+
+  intervalSubscription?: Subscription;
 
   constructor(private matIconRegistry: MatIconRegistry,
-              private domSanitizer: DomSanitizer
+              private domSanitizer: DomSanitizer,
+              http: HttpClient,
              ) {
     this.matIconRegistry.addSvgIcon(
-      `thumb_up`,
-      this.domSanitizer.bypassSecurityTrustResourceUrl(`icons/thumb_up/baseline.svg`)
+      `add`,
+      this.domSanitizer.bypassSecurityTrustResourceUrl(`icons/add/baseline.svg`)
+    );
+    this.matIconRegistry.addSvgIcon(
+      `check`,
+      this.domSanitizer.bypassSecurityTrustResourceUrl(`icons/check/baseline.svg`)
+    );
+    this.matIconRegistry.addSvgIcon(
+      `delete_forever`,
+      this.domSanitizer.bypassSecurityTrustResourceUrl(`icons/delete_forever/baseline.svg`)
     );
+
+    this.http = http;
+  }
+
+  add() {
+    const ident = uuidv4();
+    const curr: Map<string, SpmMail> = this.spmMails$.getValue();
+    curr.set(ident, { state: 'loading' });
+    this.spmMails$.next(curr);
+    this.http.get('/spm/generate', { headers: new HttpHeaders({ 'Accept': 'text/plain' }), observe: 'body' as const, responseType: 'text' as const }).subscribe(payload => this.load(ident, payload))
+  }
+
+  load(k: string, encoded: string) {
+    const payload = jwtDecode<SpmJwtPayload>(encoded);
+    if (typeof payload.aud === 'string') {
+      const curr: Map<string, SpmMail> = this.spmMails$.getValue();
+      curr.set(k, {
+        state: 'loaded',
+        local: payload.local,
+        domain: payload.aud,
+        jwt: encoded,
+        expiration: payload.exp ? new Date(1000 * payload.exp) : undefined,
+        start: payload.nbf ? new Date(1000 * payload.nbf) : undefined,
+        percent_expiration: payload.exp && payload.nbf ? percentExpiration(new Date(1000 * payload.nbf), new Date(1000 * payload.exp)) : undefined
+      });
+      this.spmMails$.next(curr);
+    }
+  }
+
+  handleClaimError(k: string, error: HttpErrorResponse) {
+    this.setState(k, 'loaded');
+
+    return throwError(() => new Error('Claiming failed.'));
+  }
+
+  claim(k: string) {
+    const val = this.spmMails$.getValue().get(k);
+    if (!val || val.state !== 'loaded')
+      return;
+
+    this.setState(k, 'claiming');
+
+    this.http.post('/spm/claim', val.jwt, { observe: 'response' as const, headers: new HttpHeaders({ 'Content-Type': 'text/plain; charset=utf-8' }) }).pipe(catchError(error => this.handleClaimError(k, error))).subscribe(response => this.claimed(k, response))
   }
 
-  ngOnInit(): void {
+  setState(k: string, state: 'loaded' | 'claiming') {
+    const curr: Map<string, SpmMail> = this.spmMails$.getValue();
+    const val = curr.get(k);
+    if (!val || (val.state !== 'loaded' && val.state !== 'claiming'))
+      return;
+
+    curr.set(k, {...val, state: state});
+    this.spmMails$.next(curr);
+  }
+
+  claimed(k: string, response: HttpResponse<any>) {
+    if (response.status !== 204) {
+      this.setState(k, 'loaded');
+      return;
+    }
+
+    const curr: Map<string, SpmMail> = this.spmMails$.getValue();
+    const val = curr.get(k);
+    if (val && (val.state === 'claiming' || val.state === 'loaded')) {
+      curr.set(k, {state: "claimed", local: val.local, domain: val.domain});
+    }
+    this.spmMails$.next(curr);
   }
 
+  forget(k: string) {
+    const curr: Map<string, SpmMail> = this.spmMails$.getValue();
+    curr.delete(k);
+    this.spmMails$.next(curr);
+  }
+
+  stepSpmMails(curr: Map<string, SpmMail>) {
+    curr.forEach((value, key) => curr.set(key, updateSpmExpiration(value)));
+    this.spmMails$.next(curr);
+  }
+
+  ngOnInit() {
+    this.intervalSubscription = interval(1000).pipe(withLatestFrom(this.spmMails$)).subscribe(([_, mails]: [number, Map<string, SpmMail>]) => this.stepSpmMails(mails));
+  }
+
+  ngOnDestroy() {
+    this.intervalSubscription?.unsubscribe();
+  }
+
+  asIsOrder(a: any, b: any) {
+    return -1;
+  }
 }
diff --git a/overlays/spm/frontend/src/app/spm/spm.module.ts b/overlays/spm/frontend/src/app/spm/spm.module.ts
new file mode 100644
index 00000000..f51e6e98
--- /dev/null
+++ b/overlays/spm/frontend/src/app/spm/spm.module.ts
@@ -0,0 +1,31 @@
+import { NgModule } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { SpmComponent } from './spm.component';
+import { RouterModule } from '@angular/router';
+
+import { MatIconModule } from '@angular/material/icon';
+import { MatButtonModule } from '@angular/material/button';
+import { MatCardModule } from '@angular/material/card';
+import { FlexLayoutModule } from "@angular/flex-layout";
+import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
+import { MatProgressBarModule } from '@angular/material/progress-bar';
+
+@NgModule({
+  declarations: [SpmComponent],
+  exports: [SpmComponent],
+  imports: [
+    RouterModule.forChild([{
+      path: '',
+      pathMatch: 'full',
+      component: SpmComponent
+    }]),
+    MatIconModule,
+    MatButtonModule,
+    MatCardModule,
+    CommonModule,
+    FlexLayoutModule,
+    MatProgressSpinnerModule,
+    MatProgressBarModule,
+  ]
+})
+export class SpmModule {}
diff --git a/overlays/spm/frontend/src/custom-theme.scss b/overlays/spm/frontend/src/custom-theme.scss
index 5c2d48aa..36369bd5 100644
--- a/overlays/spm/frontend/src/custom-theme.scss
+++ b/overlays/spm/frontend/src/custom-theme.scss
@@ -49,3 +49,5 @@ $spm-frontend-dark-theme: mat.define-dark-theme((
 
 html, body { height: 100%; }
 body { margin: 0; font-family: Roboto, "Helvetica Neue", sans-serif; }
+
+.mono { font-family: "Source Sans Pro", monospace; }
diff --git a/overlays/spm/frontend/src/styles.sass b/overlays/spm/frontend/src/styles.sass
index 4f2cb82a..4ffe0b36 100644
--- a/overlays/spm/frontend/src/styles.sass
+++ b/overlays/spm/frontend/src/styles.sass
@@ -1,2 +1,3 @@
 /* You can add global styles to this file, and also import other style files */
 @import @fontsource/roboto
+@import @fontsource/source-sans-pro
diff --git a/overlays/spm/frontend/yarn-project.nix b/overlays/spm/frontend/yarn-project.nix
index a070e3f2..07017812 100644
--- a/overlays/spm/frontend/yarn-project.nix
+++ b/overlays/spm/frontend/yarn-project.nix
@@ -120,17 +120,21 @@ let
 
 cacheEntries = {
 "@fontsource/roboto@npm:4.5.7" = { filename = "@fontsource-roboto-npm-4.5.7-315fd54028-3f9afc7f4c.zip"; sha512 = "3f9afc7f4c77e517e804e65823db5aea2513e8352fbc26cf7ea8b8b11e7dc6eff48d7a2855ed71e3a6b727446b2bf137629e2389fe3d676be45d95dd9992b558"; };
+"@fontsource/source-sans-pro@npm:4.5.10" = { filename = "@fontsource-source-sans-pro-npm-4.5.10-520cde2259-d0b786cdff.zip"; sha512 = "d0b786cdff56e2b9f0dbb557473342ac95bc2021eea57097a29244936554a1f452b1ba5b053f11f2f3bcf58ba77823ac1e2a3ff8aba8c4618026a131a025a86d"; };
 "@material-icons/svg@npm:1.0.28" = { filename = "@material-icons-svg-npm-1.0.28-205466118b-c40b15422b.zip"; sha512 = "c40b15422b0d74ef9bb6ac14a8e7669a435d12bfcc8ab2fb7c986a95a37dad1abaac6e98d52b195b7643f982f7e5f21413c5c730ba5e3c810f0c04f1da068af7"; };
 "@types/jasmine@npm:3.10.6" = { filename = "@types-jasmine-npm-3.10.6-bc64f97df3-dff2c26a9e.zip"; sha512 = "dff2c26a9ecbc8198d2f5bf1860275b0b323c80db772c2417d7217afa28bd05fee4b98ab3673dcb18d859f2cd0e084b0dcbd33629fcbe6945b08a72f8e5c36d2"; };
 "@types/node@npm:12.20.52" = { filename = "@types-node-npm-12.20.52-be1a44f9b8-b720ee939a.zip"; sha512 = "b720ee939a43f1427baf1606deee97e50892ff482bf3d64ab8a1eda3a50802a80866a232aeab337621f6ea4fdc4515147d7829337653e9e99d97c3aaeec3615d"; };
+"@types/uuid@npm:8.3.4" = { filename = "@types-uuid-npm-8.3.4-7547f4402c-6f11f3ff70.zip"; sha512 = "6f11f3ff70f30210edaa8071422d405e9c1d4e53abbe50fdce365150d3c698fe7bbff65c1e71ae080cbfb8fded860dbb5e174da96fdbbdfcaa3fb3daa474d20f"; };
 "jasmine-core@npm:4.0.1" = { filename = "jasmine-core-npm-4.0.1-e72087e57c-f097bf2c68.zip"; sha512 = "f097bf2c681acb55e03fb56a1569a9dfa8fcdf7c291aeb8786cb693c3a803ba2a59d6bac4c1facd239d778cc6f643d0a78920d9d278cba5d0cd46779b2546822"; };
 "karma-jasmine-html-reporter@npm:1.7.0" = { filename = "karma-jasmine-html-reporter-npm-1.7.0-87aa5c7cce-926c25858e.zip"; sha512 = "926c25858ea45115496524749881837de0091e3f8119e0f81a18c377e69fb82f832836b94e08d2a24fbc49aa21b491ae0bb861f07404f144c92bc84f409ef202"; };
 "tslib@npm:2.4.0" = { filename = "tslib-npm-2.4.0-9cb6dc5030-8c4aa6a3c5.zip"; sha512 = "8c4aa6a3c5a754bf76aefc38026134180c053b7bd2f81338cb5e5ebf96fefa0f417bff221592bf801077f5bf990562f6264fecbc42cd3309b33872cb6fc3b113"; };
+"uuid@npm:8.3.2" = { filename = "uuid-npm-8.3.2-eca0baba53-5575a8a75c.zip"; sha512 = "5575a8a75c13120e2f10e6ddc801b2c7ed7d8f3c8ac22c7ed0c7b2ba6383ec0abda88c905085d630e251719e0777045ae3236f04c812184b7c765f63a70e58df"; };
 "typescript@npm:4.6.4" = { filename = "typescript-npm-4.6.4-114dfa5f7e-e7bfcc39cd.zip"; sha512 = "e7bfcc39cd4571a63a54e5ea21f16b8445268b9900bf55aee0e02ad981be576acc140eba24f1af5e3c1457767c96cea6d12861768fb386cf3ffb34013718631a"; };
 "@angular/animations@npm:13.3.9" = { filename = "@angular-animations-npm-13.3.9-e1d514c5f5-4c77f5678a.zip"; sha512 = "4c77f5678acc88cc6cba6e76c498bc0951dbcba2f985eded4972f830857def10918551a805882017655df8dbc8c39821ee8a5ca295d0abf7d82746799aa7f212"; };
 "@angular/common@npm:13.3.9" = { filename = "@angular-common-npm-13.3.9-9a7d731ff5-984af09c8a.zip"; sha512 = "984af09c8af87d78a85f743e6923c047c032489a97dd93b8d10702e7556cb842b63a2c836c339f418fe73cc0cd0ce50e262a27a5c721cd8bec35279376625219"; };
 "@angular/compiler@npm:13.3.9" = { filename = "@angular-compiler-npm-13.3.9-06a00a359f-4e80398d61.zip"; sha512 = "4e80398d6121b70961ec3a7565ba897dcd63788b78c4011817fd7d3114a398f29c79f5ca985bffcc1e7e11a57dc89054e5cfef410720aacb9b9368647f452798"; };
 "@angular/core@npm:13.3.9" = { filename = "@angular-core-npm-13.3.9-8bfa1070cd-4b4ce78de4.zip"; sha512 = "4b4ce78de4aadfb6f5e2d8417157d60337052c02608137e5a6548d8e6a8ef9bb4edd29187a2b8ea2720527c20731797b5d0d97ab800e580ccc5e5b609caf80c5"; };
+"@angular/flex-layout@npm:13.0.0-beta.38" = { filename = "@angular-flex-layout-npm-13.0.0-beta.38-a6255273fa-c5f22d6748.zip"; sha512 = "c5f22d6748ad8dc2ebc9fa57c82d80cb9f9942d66dfb0246315d351872a2c9df5fa95d849fb0d2750ca99812d5e27d073b7842e07e6f21e541cbe337d9f4e7ed"; };
 "@angular/forms@npm:13.3.9" = { filename = "@angular-forms-npm-13.3.9-bd7c125354-7d95a7c482.zip"; sha512 = "7d95a7c4828f84be28882320ce4ea685b7990bb0dd920417ce3285d4ad61231b546c27e75b8fc90c4a24629c1cb5ae7692af59f2d9992887672ee3461027683d"; };
 "@angular/material@npm:13.3.7" = { filename = "@angular-material-npm-13.3.7-5b8dc87806-a98ea8117e.zip"; sha512 = "a98ea8117e381412d77f972247f56b87542c01e97964ef6b6d369df5c0a9bc3d247886ad22b235a4e5a471f20e1724297036c9acfcdd2d03edaa4bedd8f7bbf8"; };
 "@angular/platform-browser-dynamic@npm:13.3.9" = { filename = "@angular-platform-browser-dynamic-npm-13.3.9-3414000d2b-34967ed4fd.zip"; sha512 = "34967ed4fd6b81bacdef17432334e6c99656936d0f4625d8fae854f0984868e6ce0b5c497fb028c68971d09eaf85080ce201ee023c803c1126970a2a831528cf"; };
@@ -138,9 +142,11 @@ cacheEntries = {
 "@angular/router@npm:13.3.9" = { filename = "@angular-router-npm-13.3.9-c3b3c739a8-e675ff9a3e.zip"; sha512 = "e675ff9a3e33c92041c897601d633372a3cfaf502d4779b01469f1f26798d0bdf9b2b411082fe64d997bda0c75f7f12fbb32013286447b1398bc70565df028cb"; };
 "karma-chrome-launcher@npm:3.1.1" = { filename = "karma-chrome-launcher-npm-3.1.1-871ed2dfa7-8442219105.zip"; sha512 = "8442219105e1f11a9284fd47f2e21e34720f7e725f25ea08f7525a7ec2088e2c1b65e2def4d7780139d296afc5c30bf4e1d4a839a097eb814031c2f6b379b39f"; };
 "karma-jasmine@npm:4.0.2" = { filename = "karma-jasmine-npm-4.0.2-8647c711ec-bf884704af.zip"; sha512 = "bf884704af1fd19816d9f4e96b25e286ff1a57adcabe1f15e3d2b3e9c1da873c1c843b9eab4274c27e63a99f1c3dea864f1f5eca1a10dc065e6e9d5796c207b4"; };
+"ngx-webstorage@npm:9.0.0" = { filename = "ngx-webstorage-npm-9.0.0-64bf01f819-988ecf069d.zip"; sha512 = "988ecf069d3bdf2c8108cc3e011410eb2e951b6b7932ceddcd5bb1141d42cabd62be97e2d248dd495d5ce4917934ef866a431a0afecd8d90de1040978a933b82"; };
 "rxjs@npm:7.5.5" = { filename = "rxjs-npm-7.5.5-d0546b1ccb-e034f60805.zip"; sha512 = "e034f60805210cce756dd2f49664a8108780b117cf5d0e2281506e9e6387f7b4f1532d974a8c8b09314fa7a16dd2f6cff3462072a5789672b5dcb45c4173f3c6"; };
 "zone.js@npm:0.11.5" = { filename = "zone.js-npm-0.11.5-78b46cd237-7dba3af83c.zip"; sha512 = "7dba3af83cc68e881e8a5cc549e4a7bab5f32c5289838f14eb251871816210a39ed8bcd89030593b56d469b4aa8271d644e71ad408fcadd4ccd61b8c7203f2ef"; };
 "@angular/cdk@npm:13.3.7" = { filename = "@angular-cdk-npm-13.3.7-58a23cc0a3-a2944da577.zip"; sha512 = "a2944da5774a67956fe48762748b2e24dbd58be760652aca5c22fcfa67ad3e01635f6890c689596fe1525d6dbb2a7bd46ed616bdc4d9ee05db64d849b410cbf9"; };
+"jwt-decode@npm:3.1.2" = { filename = "jwt-decode-npm-3.1.2-bf3ab26591-20a4b072d4.zip"; sha512 = "20a4b072d44ce3479f42d0d2c8d3dabeb353081ba4982e40b83a779f2459a70be26441be6c160bfc8c3c6eadf9f6380a036fbb06ac5406b5674e35d8c4205eeb"; };
 "jasmine-core@npm:3.99.1" = { filename = "jasmine-core-npm-3.99.1-07f52d92cc-4e4a89739d.zip"; sha512 = "4e4a89739d99e471b86c7ccc4c5c244a77cc6d1e17b2b0d87d81266b8415697354d8873f7e764790a10661744f73a753a6e9bcd9b3e48c66a0c9b8a092b071b7"; };
 "parse5@npm:5.1.1" = { filename = "parse5-npm-5.1.1-8e63d82cff-613a714af4.zip"; sha512 = "613a714af4c1101d1cb9f7cece2558e35b9ae8a0c03518223a4a1e35494624d9a9ad5fad4c13eab66a0e0adccd9aa3d522fc8f5f9cc19789e0579f3fa0bdfc65"; };
 "which@npm:1.3.1" = { filename = "which-npm-1.3.1-f0ebb8bdd8-f2e185c624.zip"; sha512 = "f2e185c6242244b8426c9df1510e86629192d93c1a986a7d2a591f2c24869e7ffd03d6dac07ca863b2e4c06f59a4cc9916c585b72ee9fa1aa609d0124df15e04"; };
@@ -182,7 +188,6 @@ cacheEntries = {
 "ini@npm:2.0.0" = { filename = "ini-npm-2.0.0-28f7426761-e7aadc5fb2.zip"; sha512 = "e7aadc5fb2e4aefc666d74ee2160c073995a4061556b1b5b4241ecb19ad609243b9cceafe91bae49c219519394bbd31512516cb22a3b1ca6e66d869e0447e84e"; };
 "jsonc-parser@npm:3.0.0" = { filename = "jsonc-parser-npm-3.0.0-66e692e88a-1df2326f1f.zip"; sha512 = "1df2326f1f9688de30c70ff19c5b2a83ba3b89a1036160da79821d1361090775e9db502dc57a67c11b56e1186fc1ed70b887f25c5febf9a3ec4f91435836c99d"; };
 "symbol-observable@npm:4.0.0" = { filename = "symbol-observable-npm-4.0.0-5c36594410-212c7edce6.zip"; sha512 = "212c7edce6186634d671336a88c0e0bbd626c2ab51ed57498dc90698cce541839a261b969c2a1e8dd43762133d47672e8b62e0b1ce9cf4157934ba45fd172ba8"; };
-"uuid@npm:8.3.2" = { filename = "uuid-npm-8.3.2-eca0baba53-5575a8a75c.zip"; sha512 = "5575a8a75c13120e2f10e6ddc801b2c7ed7d8f3c8ac22c7ed0c7b2ba6383ec0abda88c905085d630e251719e0777045ae3236f04c812184b7c765f63a70e58df"; };
 "debug@npm:4.3.3" = { filename = "debug-npm-4.3.3-710fd4cc7f-14472d56fe.zip"; sha512 = "14472d56fe4a94dbcfaa6dbed2dd3849f1d72ba78104a1a328047bb564643ca49df0224c3a17fa63533fd11dd3d4c8636cd861191232a2c6735af00cc2d4de16"; };
 "semver@npm:7.3.5" = { filename = "semver-npm-7.3.5-618cf5db6a-5eafe6102b.zip"; sha512 = "5eafe6102bea2a7439897c1856362e31cc348ccf96efd455c8b5bc2c61e6f7e7b8250dc26b8828c1d76a56f818a7ee907a36ae9fb37a599d3d24609207001d60"; };
 "yallist@npm:4.0.0" = { filename = "yallist-npm-4.0.0-b493d9e907-343617202a.zip"; sha512 = "343617202af32df2a15a3be36a5a8c0c8545208f3d3dfbc6bb7c3e3b7e8c6f8e7485432e4f3b88da3031a6e20afa7c711eded32ddfb122896ac5d914e75848d5"; };
@@ -984,7 +989,6 @@ cacheEntries = {
 "jsesc@npm:0.5.0" = { filename = "jsesc-npm-0.5.0-6827074492-b8b44cbfc9.zip"; sha512 = "b8b44cbfc92f198ad972fba706ee6a1dfa7485321ee8c0b25f5cedd538dcb20cde3197de16a7265430fce8277a12db066219369e3d51055038946039f6e20e17"; };
 "unicode-canonical-property-names-ecmascript@npm:2.0.0" = { filename = "unicode-canonical-property-names-ecmascript-npm-2.0.0-d2d8554a14-39be078afd.zip"; sha512 = "39be078afd014c14dcd957a7a46a60061bc37c4508ba146517f85f60361acf4c7539552645ece25de840e17e293baa5556268d091ca6762747fdd0c705001a45"; };
 "unicode-property-aliases-ecmascript@npm:2.0.0" = { filename = "unicode-property-aliases-ecmascript-npm-2.0.0-1636cb7768-dda4d39128.zip"; sha512 = "dda4d39128cbbede2ac60fbb85493d979ec65913b8a486bf7cb7a375a2346fa48cbf9dc6f1ae23376e7e8e684c2b411434891e151e865a661b40a85407db51d0"; };
-"ngx-webstorage@npm:9.0.0" = { filename = "ngx-webstorage-npm-9.0.0-64bf01f819-988ecf069d.zip"; sha512 = "988ecf069d3bdf2c8108cc3e011410eb2e951b6b7932ceddcd5bb1141d42cabd62be97e2d248dd495d5ce4917934ef866a431a0afecd8d90de1040978a933b82"; };
 };
 
 in optionalOverride overrideAttrs project
diff --git a/overlays/spm/frontend/yarn.lock b/overlays/spm/frontend/yarn.lock
index 21ace08d..9bd93e91 100644
--- a/overlays/spm/frontend/yarn.lock
+++ b/overlays/spm/frontend/yarn.lock
@@ -283,6 +283,21 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@angular/flex-layout@npm:^13.0.0-beta.38":
+  version: 13.0.0-beta.38
+  resolution: "@angular/flex-layout@npm:13.0.0-beta.38"
+  dependencies:
+    tslib: ^2.3.0
+  peerDependencies:
+    "@angular/cdk": ^13.0.0
+    "@angular/common": ^13.0.0
+    "@angular/core": ^13.0.0
+    "@angular/platform-browser": ^13.0.0
+    rxjs: ^6.5.3 || ^7.4.0
+  checksum: c5f22d6748ad8dc2ebc9fa57c82d80cb9f9942d66dfb0246315d351872a2c9df5fa95d849fb0d2750ca99812d5e27d073b7842e07e6f21e541cbe337d9f4e7ed
+  languageName: node
+  linkType: hard
+
 "@angular/forms@npm:~13.3.0":
   version: 13.3.9
   resolution: "@angular/forms@npm:13.3.9"
@@ -1710,6 +1725,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@fontsource/source-sans-pro@npm:^4.5.10":
+  version: 4.5.10
+  resolution: "@fontsource/source-sans-pro@npm:4.5.10"
+  checksum: d0b786cdff56e2b9f0dbb557473342ac95bc2021eea57097a29244936554a1f452b1ba5b053f11f2f3bcf58ba77823ac1e2a3ff8aba8c4618026a131a025a86d
+  languageName: node
+  linkType: hard
+
 "@gar/promisify@npm:^1.0.1, @gar/promisify@npm:^1.1.3":
   version: 1.1.3
   resolution: "@gar/promisify@npm:1.1.3"
@@ -2164,6 +2186,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/uuid@npm:^8.3.4":
+  version: 8.3.4
+  resolution: "@types/uuid@npm:8.3.4"
+  checksum: 6f11f3ff70f30210edaa8071422d405e9c1d4e53abbe50fdce365150d3c698fe7bbff65c1e71ae080cbfb8fded860dbb5e174da96fdbbdfcaa3fb3daa474d20f
+  languageName: node
+  linkType: hard
+
 "@types/ws@npm:^8.2.2":
   version: 8.5.3
   resolution: "@types/ws@npm:8.5.3"
@@ -5457,6 +5486,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"jwt-decode@npm:^3.1.2":
+  version: 3.1.2
+  resolution: "jwt-decode@npm:3.1.2"
+  checksum: 20a4b072d44ce3479f42d0d2c8d3dabeb353081ba4982e40b83a779f2459a70be26441be6c160bfc8c3c6eadf9f6380a036fbb06ac5406b5674e35d8c4205eeb
+  languageName: node
+  linkType: hard
+
 "karma-chrome-launcher@npm:~3.1.0":
   version: 3.1.1
   resolution: "karma-chrome-launcher@npm:3.1.1"
@@ -8083,16 +8119,20 @@ __metadata:
     "@angular/compiler": ~13.3.0
     "@angular/compiler-cli": ~13.3.0
     "@angular/core": ~13.3.0
+    "@angular/flex-layout": ^13.0.0-beta.38
     "@angular/forms": ~13.3.0
     "@angular/material": 13.3.7
     "@angular/platform-browser": ~13.3.0
     "@angular/platform-browser-dynamic": ~13.3.0
     "@angular/router": ~13.3.0
     "@fontsource/roboto": ^4.5.7
+    "@fontsource/source-sans-pro": ^4.5.10
     "@material-icons/svg": ^1.0.28
     "@types/jasmine": ~3.10.0
     "@types/node": ^12.11.1
+    "@types/uuid": ^8.3.4
     jasmine-core: ~4.0.0
+    jwt-decode: ^3.1.2
     karma: ~6.3.0
     karma-chrome-launcher: ~3.1.0
     karma-coverage: ~2.1.0
@@ -8102,6 +8142,7 @@ __metadata:
     rxjs: ~7.5.0
     tslib: ^2.3.0
     typescript: ~4.6.2
+    uuid: ^8.3.2
     zone.js: ~0.11.4
   languageName: unknown
   linkType: soft