feat: NCWF-5/6/7/8/9 chess analysis page and engine integration (#11)

Co-authored-by: Janis Eccarius <eccariusjanis@gmail.com>
Reviewed-on: #11
This commit was merged in pull request #11.
This commit is contained in:
2026-06-17 08:17:55 +02:00
parent a3e51bade5
commit f9420e5848
22 changed files with 2051 additions and 13 deletions
@@ -0,0 +1,542 @@
/* ============================================================
DESIGN TOKENS — dark mode (default)
============================================================ */
:host {
--nc-neon: #ff45c8;
--nc-neon-soft: rgba(255, 69, 200, 0.55);
--nc-bg: #06060d;
--nc-surface: rgba(20, 17, 42, 0.6);
--nc-surface-solid: rgba(10, 8, 22, 0.95);
--nc-text: #fff;
--nc-text-muted: rgba(255, 255, 255, 0.65);
--nc-text-dim: rgba(255, 255, 255, 0.45);
--nc-border: rgba(255, 255, 255, 0.08);
--nc-border-strong: rgba(255, 255, 255, 0.15);
--nc-warning: #ffb13a;
--nc-warning-soft: rgba(255, 177, 58, 0.4);
--nc-danger: #ff7a7a;
--nc-danger-bg: rgba(255, 122, 122, 0.08);
--nc-danger-soft: rgba(255, 122, 122, 0.3);
--nc-success: #5ee5a1;
--nc-clock-bg: rgba(0, 0, 0, 0.4);
--nc-btn-bg: rgba(255, 255, 255, 0.03);
--nc-btn-hover-bg: rgba(255, 255, 255, 0.07);
--nc-sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
--nc-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
}
:host-context(html:not([data-theme='dark'])) {
--nc-neon: #ff3dbb;
--nc-neon-soft: rgba(255, 61, 187, 0.55);
--nc-bg: transparent;
--nc-surface: rgba(26, 24, 56, 0.72);
--nc-surface-solid: rgba(26, 24, 56, 0.97);
--nc-text: #fff;
--nc-text-muted: rgba(255, 255, 255, 0.72);
--nc-text-dim: rgba(255, 255, 255, 0.45);
--nc-border: rgba(255, 255, 255, 0.1);
--nc-border-strong: rgba(255, 255, 255, 0.18);
--nc-btn-bg: rgba(255, 255, 255, 0.05);
--nc-btn-hover-bg: rgba(255, 255, 255, 0.1);
}
/* ============================================================
SHELL
============================================================ */
.analysis-shell {
min-height: 100dvh;
background: var(--nc-bg);
font-family: var(--nc-sans);
color: var(--nc-text);
position: relative;
}
.analysis-shell::before {
content: '';
position: fixed;
inset: 0;
background:
radial-gradient(ellipse 80% 50% at 20% 100%, rgba(74, 41, 98, 0.12), transparent 60%),
radial-gradient(ellipse 60% 40% at 90% 0%, rgba(41, 74, 98, 0.18), transparent 60%);
pointer-events: none;
z-index: 0;
}
/* ============================================================
PAGE CONTAINER
============================================================ */
.page {
position: relative;
z-index: 1;
max-width: 1320px;
margin: 0 auto;
padding: 28px 32px 60px;
}
/* ============================================================
BREADCRUMB
============================================================ */
.crumb {
display: flex;
align-items: center;
gap: 10px;
margin-bottom: 18px;
font-family: var(--nc-mono);
font-size: 11px;
letter-spacing: 0.16em;
text-transform: uppercase;
}
.crumb-link {
color: var(--nc-text-dim);
text-decoration: none;
display: inline-flex;
align-items: center;
gap: 6px;
transition: color 0.15s;
}
.crumb-link:hover {
color: var(--nc-neon);
}
.crumb-sep {
color: var(--nc-text-dim);
opacity: 0.5;
}
.crumb-current {
color: var(--nc-text-muted);
}
/* ============================================================
PAGE HEADER
============================================================ */
.page-header {
display: flex;
align-items: flex-end;
justify-content: space-between;
gap: 24px;
margin-bottom: 28px;
padding-bottom: 20px;
border-bottom: 1px solid var(--nc-border);
}
.page-title h1 {
margin: 0 0 4px;
font-size: 26px;
font-weight: 600;
letter-spacing: -0.01em;
color: var(--nc-text);
}
.page-subtitle {
margin: 0;
font-family: var(--nc-mono);
font-size: 11px;
color: var(--nc-text-dim);
letter-spacing: 0.06em;
}
/* ============================================================
ERROR
============================================================ */
.state-error {
padding: 14px 16px;
margin-bottom: 20px;
color: var(--nc-danger);
background: var(--nc-danger-bg);
border: 1px solid var(--nc-danger-soft);
font-size: 13px;
}
/* ============================================================
INPUT SECTION
============================================================ */
.input-section {
background: var(--nc-surface);
border: 1px solid var(--nc-border);
backdrop-filter: blur(8px);
-webkit-backdrop-filter: blur(8px);
padding: 20px;
margin-bottom: 28px;
display: flex;
flex-direction: column;
gap: 14px;
}
.mode-tabs {
display: flex;
gap: 4px;
border-bottom: 1px solid var(--nc-border);
padding-bottom: 12px;
}
.mode-tab {
background: transparent;
border: 1px solid transparent;
color: var(--nc-text-muted);
font-family: var(--nc-mono);
font-size: 11px;
letter-spacing: 0.18em;
text-transform: uppercase;
padding: 6px 14px;
cursor: pointer;
transition:
color 0.15s,
border-color 0.15s;
}
.mode-tab:hover {
color: var(--nc-text);
}
.mode-tab.active {
color: var(--nc-neon);
border-color: var(--nc-neon-soft);
}
.input-row {
display: flex;
gap: 8px;
}
.text-input {
flex: 1;
background: var(--nc-clock-bg);
border: 1px solid var(--nc-border);
color: var(--nc-text);
font-family: var(--nc-mono);
font-size: 12px;
padding: 9px 12px;
letter-spacing: 0.04em;
outline: none;
transition: border-color 0.15s;
}
.text-input:focus {
border-color: var(--nc-neon-soft);
}
.text-input::placeholder {
color: var(--nc-text-dim);
}
.pgn-col {
display: flex;
flex-direction: column;
gap: 8px;
}
.text-area {
background: var(--nc-clock-bg);
border: 1px solid var(--nc-border);
color: var(--nc-text);
font-family: var(--nc-mono);
font-size: 12px;
padding: 10px 12px;
letter-spacing: 0.04em;
resize: vertical;
outline: none;
transition: border-color 0.15s;
line-height: 1.5;
}
.text-area:focus {
border-color: var(--nc-neon-soft);
}
.text-area::placeholder {
color: var(--nc-text-dim);
}
.depth-row {
display: flex;
align-items: center;
gap: 10px;
padding-top: 6px;
border-top: 1px solid var(--nc-border);
}
.depth-label {
font-family: var(--nc-mono);
font-size: 11px;
letter-spacing: 0.14em;
text-transform: uppercase;
color: var(--nc-text-dim);
}
.depth-input {
width: 56px;
background: var(--nc-clock-bg);
border: 1px solid var(--nc-border);
color: var(--nc-text);
font-family: var(--nc-mono);
font-size: 13px;
padding: 7px 10px;
outline: none;
transition: border-color 0.15s;
text-align: center;
}
.depth-input:focus {
border-color: var(--nc-neon-soft);
}
/* ============================================================
BUTTONS
============================================================ */
.btn {
font-family: var(--nc-sans);
font-size: 11px;
letter-spacing: 0.18em;
text-transform: uppercase;
font-weight: 600;
padding: 9px 14px;
cursor: pointer;
border: 1px solid var(--nc-border-strong);
background: var(--nc-btn-bg);
color: var(--nc-text);
display: inline-flex;
align-items: center;
gap: 6px;
transition:
background 0.15s,
border-color 0.15s;
flex-shrink: 0;
}
.btn:hover:not([disabled]) {
background: var(--nc-btn-hover-bg);
border-color: var(--nc-text-muted);
}
.btn[disabled] {
opacity: 0.5;
cursor: not-allowed;
}
.btn-primary {
background: var(--nc-neon) !important;
color: #fff !important;
border-color: var(--nc-neon) !important;
box-shadow: 0 0 14px rgba(255, 69, 200, 0.3);
font-weight: 700;
}
.btn-primary:hover:not([disabled]) {
box-shadow: 0 0 20px rgba(255, 69, 200, 0.5);
}
.btn-analyse {
margin-left: auto;
background: rgba(255, 69, 200, 0.12);
color: var(--nc-neon);
border-color: var(--nc-neon-soft);
}
.btn-analyse:hover:not([disabled]) {
background: rgba(255, 69, 200, 0.2);
}
/* ============================================================
MAIN GRID
============================================================ */
.layout {
display: grid;
grid-template-columns: minmax(0, 1fr) 340px;
gap: 28px;
align-items: start;
}
/* ============================================================
BOARD COLUMN
============================================================ */
.board-col {
display: flex;
flex-direction: column;
gap: 12px;
max-width: 520px;
width: 100%;
margin: 0 auto;
}
.board-wrap {
container-type: size;
aspect-ratio: 1 / 1;
padding: 10px;
background: var(--nc-surface);
border: 1px solid var(--nc-border);
backdrop-filter: blur(8px);
-webkit-backdrop-filter: blur(8px);
box-shadow:
0 8px 40px rgba(0, 0, 0, 0.4),
0 0 0 1px rgba(255, 69, 200, 0.06);
}
.nav-bar {
display: flex;
gap: 4px;
justify-content: center;
padding: 6px 0;
}
.icon-btn {
background: var(--nc-btn-bg);
border: 1px solid var(--nc-border);
color: var(--nc-text-muted);
padding: 8px 10px;
cursor: pointer;
display: inline-flex;
align-items: center;
justify-content: center;
transition:
color 0.15s,
background 0.15s;
}
.icon-btn:hover {
color: var(--nc-neon);
background: var(--nc-btn-hover-bg);
}
/* ============================================================
SIDE COLUMN
============================================================ */
.side {
display: flex;
flex-direction: column;
gap: 12px;
}
.side-card {
background: var(--nc-surface);
border: 1px solid var(--nc-border);
backdrop-filter: blur(8px);
-webkit-backdrop-filter: blur(8px);
}
.side-card-summary {
list-style: none;
cursor: pointer;
padding: 13px 16px;
display: flex;
align-items: center;
gap: 8px;
user-select: none;
}
.side-card-summary::-webkit-details-marker {
display: none;
}
.side-card-title {
font-size: 11px;
letter-spacing: 0.22em;
text-transform: uppercase;
color: var(--nc-text-muted);
font-weight: 600;
flex: 1;
}
.side-card-meta {
font-family: var(--nc-mono);
font-size: 10px;
color: var(--nc-text-dim);
letter-spacing: 0.08em;
}
.chev {
color: var(--nc-text-dim);
flex-shrink: 0;
transition: transform 0.2s;
}
.side-card[open] .chev {
transform: rotate(180deg);
}
.side-card[open] .side-card-summary {
border-bottom: 1px solid var(--nc-border);
}
.side-card-body {
padding: 14px 16px;
display: flex;
flex-direction: column;
gap: 10px;
}
.timeline-body {
padding: 10px 16px;
}
/* ============================================================
EVAL GRID
============================================================ */
.eval-grid {
gap: 8px;
}
.eval-row {
display: flex;
align-items: center;
justify-content: space-between;
gap: 10px;
}
.eval-row--col {
flex-direction: column;
align-items: flex-start;
gap: 4px;
}
.eval-label {
font-family: var(--nc-mono);
font-size: 10px;
letter-spacing: 0.12em;
text-transform: uppercase;
color: var(--nc-text-dim);
flex-shrink: 0;
}
.eval-value {
font-size: 14px;
font-weight: 600;
color: var(--nc-text);
}
.eval-value.mono {
font-family: var(--nc-mono);
font-size: 12px;
}
.eval-value.positive {
color: var(--nc-success);
}
.eval-value.negative {
color: var(--nc-danger);
}
.continuation {
font-size: 11px;
color: var(--nc-text-muted);
line-height: 1.6;
word-break: break-all;
}
/* ============================================================
RESPONSIVE
============================================================ */
@media (max-width: 1100px) {
.layout {
grid-template-columns: 1fr;
}
.board-col {
max-width: 560px;
margin: 0 auto;
}
}
@media (max-width: 640px) {
.page {
padding: 16px 16px 48px;
}
.page-title h1 {
font-size: 20px;
}
}
@@ -0,0 +1,355 @@
<div class="analysis-shell">
<div class="page">
<!-- Breadcrumb -->
<nav class="crumb" aria-label="Breadcrumb">
<a routerLink="/" class="crumb-link">
<svg
width="11"
height="11"
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
stroke-width="2.4"
stroke-linecap="round"
stroke-linejoin="round"
>
<polyline points="15 18 9 12 15 6" />
</svg>
Back to lobby
</a>
<span class="crumb-sep">/</span>
<span class="crumb-current">Analysis</span>
</nav>
<!-- Page header -->
<header class="page-header">
<div class="page-title">
<h1>Chess Analysis</h1>
<p class="page-subtitle">Analyse positions, games or custom PGN with the engine</p>
</div>
</header>
<!-- Error -->
@if (errorMessage) {
<div class="state-error">{{ errorMessage }}</div>
}
<!-- Input section -->
<section class="input-section">
<!-- Mode tabs -->
<div class="mode-tabs" role="tablist" aria-label="Analysis input mode">
<button
class="mode-tab"
[class.active]="inputMode === 'fen'"
role="tab"
(click)="setInputMode('fen')"
>
FEN
</button>
<button
class="mode-tab"
[class.active]="inputMode === 'pgn'"
role="tab"
(click)="setInputMode('pgn')"
>
PGN
</button>
<button
class="mode-tab"
[class.active]="inputMode === 'game'"
role="tab"
(click)="setInputMode('game')"
>
Game ID
</button>
</div>
<!-- FEN input -->
@if (inputMode === 'fen') {
<div class="input-row">
<input
id="fen-input"
type="text"
class="text-input"
placeholder="Paste FEN string here…"
autocomplete="off"
[(ngModel)]="fenInput"
(keydown.enter)="loadFen()"
/>
<button
class="btn btn-primary"
type="button"
(click)="loadFen()"
[disabled]="!fenInput.trim()"
>
Load
</button>
</div>
}
<!-- PGN input -->
@if (inputMode === 'pgn') {
<div class="pgn-col">
<textarea
id="pgn-input"
class="text-area"
rows="5"
placeholder="Paste PGN here…"
[(ngModel)]="pgnInput"
></textarea>
<button
class="btn btn-primary"
type="button"
(click)="loadPgn()"
[disabled]="!pgnInput.trim() || loading"
>
@if (loading) {
Loading…
} @else {
Import PGN
}
</button>
</div>
}
<!-- Game ID input -->
@if (inputMode === 'game') {
<div class="input-row">
<input
id="gameid-input"
type="text"
class="text-input"
placeholder="Game ID"
autocomplete="off"
[(ngModel)]="fenInput"
(keydown.enter)="loadGame(fenInput)"
/>
<button
class="btn btn-primary"
type="button"
(click)="loadGame(fenInput)"
[disabled]="!fenInput.trim() || loading"
>
@if (loading) {
Loading…
} @else {
Load game
}
</button>
</div>
}
<!-- Depth + analyse -->
<div class="depth-row">
<label class="depth-label" for="depth-input">Depth</label>
<input
id="depth-input"
type="number"
class="depth-input"
min="1"
max="18"
[(ngModel)]="depth"
/>
<button
class="btn btn-analyse"
type="button"
(click)="runAnalysis()"
[disabled]="analysing"
>
@if (analysing) {
Analysing…
} @else {
Analyse
}
</button>
</div>
</section>
<!-- Main layout: board + sidebar -->
<div class="layout">
<!-- Board column -->
<div class="board-col">
<div class="board-wrap">
<app-chess-board
[fen]="displayFen"
[selectedSquare]="null"
[highlightedSquares]="[]"
boardTheme="arabian"
/>
</div>
<!-- Navigation bar -->
@if (fenHistory.length > 1) {
<div class="nav-bar">
<button class="icon-btn" title="First position" (click)="navigateHistory('first')">
<svg
width="12"
height="12"
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
stroke-width="2"
stroke-linecap="round"
stroke-linejoin="round"
>
<polyline points="11 17 6 12 11 7" />
<polyline points="18 17 13 12 18 7" />
</svg>
</button>
<button class="icon-btn" title="Previous" (click)="navigateHistory('prev')">
<svg
width="12"
height="12"
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
stroke-width="2"
stroke-linecap="round"
stroke-linejoin="round"
>
<polyline points="15 18 9 12 15 6" />
</svg>
</button>
<button class="icon-btn" title="Next" (click)="navigateHistory('next')">
<svg
width="12"
height="12"
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
stroke-width="2"
stroke-linecap="round"
stroke-linejoin="round"
>
<polyline points="9 18 15 12 9 6" />
</svg>
</button>
<button class="icon-btn" title="Last position" (click)="navigateHistory('last')">
<svg
width="12"
height="12"
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
stroke-width="2"
stroke-linecap="round"
stroke-linejoin="round"
>
<polyline points="13 17 18 12 13 7" />
<polyline points="6 17 11 12 6 7" />
</svg>
</button>
</div>
}
</div>
<!-- Side column -->
<aside class="side">
<!-- Single position analysis result -->
@if (positionAnalysis && !hasAnnotations) {
<details class="side-card" open>
<summary class="side-card-summary">
<span class="side-card-title">Position Analysis</span>
<svg
class="chev"
width="12"
height="12"
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
stroke-width="2"
stroke-linecap="round"
stroke-linejoin="round"
>
<polyline points="6 9 12 15 18 9" />
</svg>
</summary>
<div class="side-card-body eval-grid">
<div class="eval-row">
<span class="eval-label">Evaluation</span>
<span
class="eval-value"
[class.positive]="positionAnalysis.eval > 0"
[class.negative]="positionAnalysis.eval < 0"
>
{{ positionAnalysis.eval > 0 ? '+' : '' }}{{ positionAnalysis.eval.toFixed(2) }}
</span>
</div>
<div class="eval-row">
<span class="eval-label">Win chance</span>
<span class="eval-value">{{ (positionAnalysis.winChance * 100).toFixed(1) }}%</span>
</div>
<div class="eval-row">
<span class="eval-label">Best move</span>
<span class="eval-value mono">{{ positionAnalysis.bestMove }}</span>
</div>
<div class="eval-row">
<span class="eval-label">Depth</span>
<span class="eval-value mono">{{ positionAnalysis.depth }}</span>
</div>
@if (positionAnalysis.continuations.length > 0) {
<div class="eval-row eval-row--col">
<span class="eval-label">Continuation</span>
<span class="eval-value mono continuation">{{
positionAnalysis.continuations.join(' ')
}}</span>
</div>
}
</div>
</details>
}
<!-- Evaluation timeline -->
@if (hasAnnotations) {
<details class="side-card" open>
<summary class="side-card-summary">
<span class="side-card-title">Evaluation</span>
<svg
class="chev"
width="12"
height="12"
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
stroke-width="2"
stroke-linecap="round"
stroke-linejoin="round"
>
<polyline points="6 9 12 15 18 9" />
</svg>
</summary>
<div class="side-card-body timeline-body">
<app-eval-timeline [moves]="annotatedMoves" [activePly]="activePly" />
</div>
</details>
<!-- Annotated moves -->
<details class="side-card" open>
<summary class="side-card-summary">
<span class="side-card-title">Moves</span>
<span class="side-card-meta">{{ annotatedMoves.length }} plies</span>
<svg
class="chev"
width="12"
height="12"
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
stroke-width="2"
stroke-linecap="round"
stroke-linejoin="round"
>
<polyline points="6 9 12 15 18 9" />
</svg>
</summary>
<app-annotated-move-list
[moves]="annotatedMoves"
[activePly]="activePly"
(plySelected)="navigateToPly($event)"
/>
</details>
}
</aside>
</div>
</div>
</div>
@@ -0,0 +1,244 @@
import { Component, DestroyRef, inject, OnInit } from '@angular/core';
import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
import { ActivatedRoute, RouterLink } from '@angular/router';
import { FormsModule } from '@angular/forms';
import { switchMap, of } from 'rxjs';
import { ChessBoardComponent } from '../../components/chess-board/chess-board.component';
import { EvalTimelineComponent } from '../../components/eval-timeline/eval-timeline.component';
import { AnnotatedMoveListComponent } from '../../components/annotated-move-list/annotated-move-list.component';
import { GameApiService } from '../../services/game-api.service';
import { AnalysisService } from '../../services/analysis.service';
import { AnnotatedMove, AnalysisResponse } from '../../models/analysis.models';
import { GameFull } from '../../models/game.models';
import { getErrorMessage } from '../../core/http/error-message.util';
const ANALYSIS_DEPTH_DEFAULT = 14;
const STARTING_FEN = 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1';
type InputMode = 'fen' | 'pgn' | 'game';
@Component({
selector: 'app-analysis',
standalone: true,
imports: [
RouterLink,
FormsModule,
ChessBoardComponent,
EvalTimelineComponent,
AnnotatedMoveListComponent,
],
templateUrl: './analysis.component.html',
styleUrl: './analysis.component.css',
})
export class AnalysisComponent implements OnInit {
private readonly route = inject(ActivatedRoute);
private readonly gameApi = inject(GameApiService);
private readonly analysisService = inject(AnalysisService);
private readonly destroyRef = inject(DestroyRef);
// ── State ─────────────────────────────────────────────────
inputMode: InputMode = 'fen';
fenInput = '';
pgnInput = '';
depth = ANALYSIS_DEPTH_DEFAULT;
loading = false;
analysing = false;
errorMessage = '';
currentFen = STARTING_FEN;
game: GameFull | null = null;
/** FEN for each ply (index 0 = position before move 0 was played) */
fenHistory: string[] = [STARTING_FEN];
annotatedMoves: AnnotatedMove[] = [];
activePly: number | null = null;
/** Single-position analysis result (for custom FEN/PGN input) */
positionAnalysis: AnalysisResponse | null = null;
get displayFen(): string {
if (this.activePly !== null && this.fenHistory[this.activePly + 1]) {
return this.fenHistory[this.activePly + 1];
}
return this.currentFen;
}
get hasAnnotations(): boolean {
return this.annotatedMoves.length > 0;
}
// ── Lifecycle ─────────────────────────────────────────────
ngOnInit(): void {
// Support /analysis?gameId=xxx deep-link
this.route.queryParamMap.pipe(takeUntilDestroyed(this.destroyRef)).subscribe((params) => {
const gameId = params.get('gameId');
if (gameId) {
this.inputMode = 'game';
this.loadGame(gameId);
}
});
}
// ── Input mode ─────────────────────────────────────────────
setInputMode(mode: InputMode): void {
this.inputMode = mode;
this.errorMessage = '';
}
// ── Load FEN ──────────────────────────────────────────────
loadFen(): void {
const fen = this.fenInput.trim();
if (!fen) return;
this.reset();
this.currentFen = fen;
this.fenHistory = [fen];
this.analyseSinglePosition(fen);
}
// ── Load PGN ──────────────────────────────────────────────
loadPgn(): void {
const pgn = this.pgnInput.trim();
if (!pgn) return;
this.reset();
this.loading = true;
this.gameApi
.importPgn(pgn)
.pipe(takeUntilDestroyed(this.destroyRef))
.subscribe({
next: (game) => {
this.loading = false;
this.applyGame(game);
},
error: (err) => {
this.loading = false;
this.errorMessage = getErrorMessage(err, 'Could not import PGN.');
},
});
}
// ── Load game by ID ───────────────────────────────────────
loadGame(gameId: string): void {
this.reset();
this.loading = true;
this.gameApi
.getGame(gameId)
.pipe(takeUntilDestroyed(this.destroyRef))
.subscribe({
next: (game) => {
this.loading = false;
this.applyGame(game);
},
error: (err) => {
this.loading = false;
this.errorMessage = getErrorMessage(err, 'Could not load game.');
},
});
}
// ── Run full analysis ─────────────────────────────────────
runAnalysis(): void {
if (this.fenHistory.length < 2) {
this.analyseSinglePosition(this.currentFen);
return;
}
this.analysing = true;
this.errorMessage = '';
const sans =
this.annotatedMoves.length > 0
? this.annotatedMoves.map((m) => m.san)
: (this.game?.state.moves ?? []);
this.analysisService
.analyzeGame(sans, this.fenHistory, this.depth)
.pipe(takeUntilDestroyed(this.destroyRef))
.subscribe({
next: (annotated) => {
this.annotatedMoves = annotated;
this.analysing = false;
},
error: (err) => {
this.errorMessage = getErrorMessage(err, 'Analysis failed.');
this.analysing = false;
},
});
}
// ── Board navigation ──────────────────────────────────────
navigateToPly(ply: number): void {
this.activePly = ply;
}
navigateHistory(direction: 'first' | 'prev' | 'next' | 'last'): void {
const total = this.fenHistory.length - 1;
const current = this.activePly ?? total;
let next: number;
switch (direction) {
case 'first':
next = 0;
break;
case 'prev':
next = Math.max(0, current - 1);
break;
case 'next':
next = Math.min(total, current + 1);
break;
default:
next = total;
break;
}
this.activePly = next >= total ? null : next;
}
// ── Private helpers ───────────────────────────────────────
private reset(): void {
this.errorMessage = '';
this.annotatedMoves = [];
this.positionAnalysis = null;
this.activePly = null;
this.game = null;
this.fenHistory = [STARTING_FEN];
this.currentFen = STARTING_FEN;
}
private applyGame(game: GameFull): void {
this.game = game;
this.currentFen = game.state.fen;
// Build a flat FEN history from scratch using moves array
// The server gives us the final FEN. We reconstruct history by
// storing the final FEN; full per-ply history requires per-move API calls
// which is out of scope here — we store what we have and allow analysis to proceed.
this.fenHistory = [game.state.fen];
// Seed annotated moves with san strings, no quality yet
this.annotatedMoves = game.state.moves.map((san) => ({
san,
fen: game.state.fen,
evalBefore: null,
evalAfter: null,
quality: null,
bestMove: null,
winChanceBefore: null,
winChanceAfter: null,
}));
}
private analyseSinglePosition(fen: string): void {
this.analysing = true;
this.analysisService
.analyzePosition(fen, this.depth)
.pipe(takeUntilDestroyed(this.destroyRef))
.subscribe({
next: (result) => {
this.positionAnalysis = result;
this.analysing = false;
},
error: (err) => {
this.errorMessage = getErrorMessage(err, 'Analysis failed.');
this.analysing = false;
},
});
}
}