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* Auth bridge for `` web components (plan §4.2, LEG-444).\n *\n * Wires three message paths around an iframe-backed widget:\n *\n * parent page --(window.postMessage 'legion:auth')--> host component\n * host --(iframe.postMessage 'AUTH_TOKEN')----> iframe\n * iframe --(window.postMessage 'legion:auth-expired')-> host component\n * └─ re-emitted as\n * CustomEvent('legion:auth-expired')\n *\n * Token sources, highest to lowest precedence:\n * 1. parent postMessage `{ type: \"legion:auth\", token }`\n * 2. `auth-token` attribute (canonical, plan §4.2)\n * 3. `api-key` attribute (legacy alias, kept for backwards-compat)\n *\n * Parent → host messages are filtered against the comma-separated\n * `allowed-parent-origins` attribute. If unset, only `window.parent === self`\n * (top-level page) and same-origin parents are accepted.\n */\n\nexport interface AuthBridgeOptions {\n /** Returns the live iframe element if mounted. */\n iframeAccessor: () => HTMLIFrameElement | null;\n /** Used as the targetOrigin when posting to the iframe. */\n baseUrl: string;\n}\n\nexport interface AuthBridgeHandle {\n /** Tear down listeners. Call from `disconnectedCallback`. */\n detach(): void;\n /** Push the current token to the iframe. Call after `iframe.onload`. */\n postCurrentToken(): void;\n /** Resolve the active token (parent override → auth-token → api-key). */\n currentToken(): string | null;\n}\n\nconst AUTH_TOKEN_MESSAGE = \"AUTH_TOKEN\";\nconst PARENT_AUTH_MESSAGE = \"legion:auth\";\nconst IFRAME_EXPIRED_MESSAGE = \"legion:auth-expired\";\n\nfunction parseAllowedOrigins(host: HTMLElement): string[] {\n const raw = host.getAttribute(\"allowed-parent-origins\") || \"\";\n return raw\n .split(\",\")\n .map((s) => s.trim())\n .filter(Boolean);\n}\n\nfunction isAllowedParentOrigin(host: HTMLElement, origin: string): boolean {\n // Same-origin is always trusted.\n if (origin === window.location.origin) return true;\n const allowed = parseAllowedOrigins(host);\n return allowed.includes(origin);\n}\n\nexport function attachAuthBridge(\n host: HTMLElement,\n opts: AuthBridgeOptions\n): AuthBridgeHandle {\n // Token override pushed by the parent via postMessage. Wins over attrs.\n let parentToken: string | null = null;\n\n const currentToken = (): string | null => {\n if (parentToken) return parentToken;\n return host.getAttribute(\"auth-token\") || host.getAttribute(\"api-key\");\n };\n\n const postCurrentToken = (): void => {\n const iframe = opts.iframeAccessor();\n const token = currentToken();\n if (!iframe || !iframe.contentWindow || !token) return;\n iframe.contentWindow.postMessage(\n { type: AUTH_TOKEN_MESSAGE, token },\n opts.baseUrl\n );\n };\n\n const onMessage = (event: MessageEvent): void => {\n if (!event || typeof event.data !== \"object\" || event.data === null) {\n return;\n }\n const data = event.data as { type?: unknown; token?: unknown };\n\n // 1. Parent → host: token refresh.\n if (data.type === PARENT_AUTH_MESSAGE) {\n if (!isAllowedParentOrigin(host, event.origin)) return;\n if (typeof data.token !== \"string\" || !data.token) return;\n parentToken = data.token;\n postCurrentToken();\n return;\n }\n\n // 2. Iframe → host: token expired. The iframe is mounted in the\n // shadow DOM; messages from it carry `event.source === iframe.contentWindow`.\n if (data.type === IFRAME_EXPIRED_MESSAGE) {\n const iframe = opts.iframeAccessor();\n if (!iframe || event.source !== iframe.contentWindow) return;\n host.dispatchEvent(\n new CustomEvent(IFRAME_EXPIRED_MESSAGE, {\n bubbles: true,\n composed: true,\n })\n );\n }\n };\n\n window.addEventListener(\"message\", onMessage);\n\n return {\n detach() {\n window.removeEventListener(\"message\", onMessage);\n },\n postCurrentToken,\n currentToken,\n };\n}\n\n/** Attribute names the bridge cares about; widgets must add these to `observedAttributes`. */\nexport const AUTH_BRIDGE_OBSERVED_ATTRS = [\n \"auth-token\",\n \"api-key\",\n \"allowed-parent-origins\",\n] as const;\n","/**\n * Web Component entry point for the Q&A widget.\n *\n * Importing this module registers the custom element\n * so it can be used in any HTML page or framework that supports web components.\n *\n * @example\n * ```ts\n * import '@legionhandtech/lht-react-widgets/qa-web-component';\n *\n * // Then use in HTML:\n * // \n * ```\n */\n\nimport { attachAuthBridge, type AuthBridgeHandle, AUTH_BRIDGE_OBSERVED_ATTRS } from \"../shared/auth-bridge\";\n\nconst QA_CSS_ATTRIBUTES = [\n \"qa-primary-color\",\n \"qa-background-color\",\n \"qa-text-color\",\n \"qa-secondary-text-color\",\n \"qa-border-color\",\n \"qa-staff-badge-color\",\n \"qa-accepted-color\",\n \"qa-title-size\",\n \"qa-body-size\",\n \"qa-meta-size\",\n \"qa-font-family\",\n \"qa-card-padding\",\n \"qa-card-gap\",\n \"qa-border-radius\",\n \"qa-card-shadow\",\n \"qa-button-radius\",\n \"qa-vote-button-size\",\n] as const;\n\nclass LegionQAElement extends HTMLElement {\n public iframe: HTMLIFrameElement | null = null;\n private authBridge: AuthBridgeHandle | null = null;\n\n constructor() {\n super();\n this.attachShadow({ mode: \"open\" });\n }\n\n static get observedAttributes(): string[] {\n return [\n \"api-url\",\n \n \"product-id\",\n \"username\",\n \"width\",\n \"height\",\n \"theme\",\n \"page-size\",\n \"show-search\",\n \"show-ask-button\",\n ...QA_CSS_ATTRIBUTES,\n \n ...AUTH_BRIDGE_OBSERVED_ATTRS,\n ];\n }\n\n connectedCallback(): void {\n this.authBridge = attachAuthBridge(this, {\n iframeAccessor: () => this.iframe,\n baseUrl: this.bridgeBaseUrl,\n });\n this.render();\n }\n\n disconnectedCallback(): void {\n this.authBridge?.detach();\n this.authBridge = null;\n }\n\n attributeChangedCallback(\n _name: string,\n oldValue: string | null,\n newValue: string | null\n ): void {\n if (oldValue !== newValue) {\n this.render();\n }\n }\n\n private get apiUrl(): string {\n return this.getAttribute(\"api-url\") || window.location.origin;\n }\n\n private get productId(): string {\n return this.getAttribute(\"product-id\") || \"\";\n }\n\n private get username(): string {\n return this.getAttribute(\"username\") || \"Anonymous\";\n }\n\n private get widgetWidth(): string {\n return this.getAttribute(\"width\") || \"600\";\n }\n\n private get widgetHeight(): string {\n return this.getAttribute(\"height\") || \"800\";\n }\n\n private get theme(): string {\n return this.getAttribute(\"theme\") || \"light\";\n }\n\n private get pageSize(): number {\n return parseInt(this.getAttribute(\"page-size\") || \"5\", 10);\n }\n\n private get showSearch(): boolean {\n return this.getAttribute(\"show-search\") !== \"false\";\n }\n\n private get showAskButton(): boolean {\n return this.getAttribute(\"show-ask-button\") !== \"false\";\n }\n\n render(): void {\n if (!this.shadowRoot) return;\n\n const iframe = document.createElement(\"iframe\");\n const url = new URL(\"/widget/qa\", this.apiUrl);\n\n if (this.productId) {\n url.searchParams.set(\"productId\", this.productId);\n }\n if (this.username) {\n url.searchParams.set(\"username\", this.username);\n }\n url.searchParams.set(\"pageSize\", String(this.pageSize));\n url.searchParams.set(\"theme\", this.theme);\n url.searchParams.set(\"showSearch\", String(this.showSearch));\n url.searchParams.set(\"showAskButton\", String(this.showAskButton));\n\n QA_CSS_ATTRIBUTES.forEach((attr) => {\n const val = this.getAttribute(attr);\n if (val !== null && val !== undefined && String(val).length > 0) {\n url.searchParams.set(attr, val);\n }\n });\n\n iframe.src = url.toString();\n iframe.width = this.widgetWidth;\n iframe.height = this.widgetHeight;\n iframe.frameBorder = \"0\";\n iframe.scrolling = \"auto\";\n iframe.title = \"Community Q&A Widget\";\n\n iframe.onload = () => {\n this.authBridge?.postCurrentToken();\n this.dispatchEvent(\n new CustomEvent(\"load\", {\n detail: { widget: \"qa\", theme: this.theme },\n })\n );\n };\n\n iframe.onerror = () => {\n if (!this.shadowRoot) return;\n this.shadowRoot.innerHTML = `
Failed to load Q&A widget
`;\n };\n\n const style = document.createElement(\"style\");\n style.textContent = `\n :host {\n display: block;\n width: ${this.widgetWidth}px;\n height: ${this.widgetHeight}px;\n }\n iframe {\n width: 100%;\n height: 100%;\n border: none;\n border-radius: 8px;\n box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);\n background: white;\n }\n `;\n\n this.shadowRoot.innerHTML = \"\";\n this.shadowRoot.appendChild(style);\n this.shadowRoot.appendChild(iframe);\n this.iframe = iframe;\n }\n\n private get bridgeBaseUrl(): string {\n return this.apiUrl;\n }\n}\n\nif (\n typeof customElements !== \"undefined\" &&\n !customElements.get(\"legion-qa\")\n) {\n customElements.define(\"legion-qa\", LegionQAElement);\n}\n\nexport { LegionQAElement };\n\n"]}