Rename expression sync to thought-based expression portraits and clean up compatibility solutions

src/utils/thoughtBasedExpressionPortraits.js

@@ -0,0 +1,73 @@
+import {
+    thoughtBasedExpressionPortraits,
+    getThoughtBasedExpressionPortrait
+} from '../core/state.js';
+import {
+    isSafeImageSrc,
+    normalizeImageSrc,
+    resolveImageUrl
+} from './imageUrls.js';
+import { isExpressionsExtensionEnabled } from './sillyTavernExpressions.js';
+
+function normalizeName(name) {
+    return String(name || '').trim().toLowerCase();
+}
+
+function namesMatch(a, b) {
+    const left = normalizeName(a);
+    const right = normalizeName(b);
+    if (!left || !right) {
+        return false;
+    }
+
+    return left === right || left.startsWith(right + ' ') || right.startsWith(left + ' ');
+}
+
+function isDocumentLikeUrl(src) {
+    const candidate = resolveImageUrl(src);
+    if (!candidate) {
+        return false;
+    }
+
+    const current = new URL(window.location.href);
+    return candidate.origin === current.origin
+        && candidate.pathname === current.pathname
+        && candidate.search === current.search;
+}
+
+export function isUsableThoughtBasedExpressionSrc(src) {
+    const normalized = normalizeImageSrc(src);
+    if (!normalized) {
+        return false;
+    }
+
+    if (isDocumentLikeUrl(normalized)) {
+        return false;
+    }
+
+    return isSafeImageSrc(normalized);
+}
+
+export function getThoughtBasedExpressionPortraitForCharacter(characterName) {
+    if (!isExpressionsExtensionEnabled()) {
+        return null;
+    }
+
+    const target = normalizeName(characterName);
+    if (!target) {
+        return null;
+    }
+
+    const exact = getThoughtBasedExpressionPortrait(target);
+    if (isUsableThoughtBasedExpressionSrc(exact)) {
+        return exact;
+    }
+
+    for (const [storedName, src] of Object.entries(thoughtBasedExpressionPortraits)) {
+        if (namesMatch(storedName, target) && isUsableThoughtBasedExpressionSrc(src)) {
+            return src;
+        }
+    }
+
+    return null;
+}