Referência da API JavaScript

O EmDash exporta funções para consultar conteúdo, gerir media e trabalhar com a base de dados.

Content Queries

As funções de consulta do EmDash seguem o padrão das live content collections do Astro e devolvem { entries, error } ou { entry, error } para tratamento de erros claro.

getEmDashCollection()

Obter todas as entradas de uma coleção.

import { getEmDashCollection } from "emdash";

const { entries: posts, error } = await getEmDashCollection("posts");

if (error) {
	console.error("Failed to load posts:", error);
}

Parameters

Options

interface CollectionFilter {
	status?: "draft" | "published" | "archived";
	limit?: number;
	where?: Record<string, string | string[]>; // Filter by field or taxonomy
}

Returns

interface CollectionResult<T> {
	entries: ContentEntry<T>[]; // Empty array if error or none found
	error?: Error; // Set if query failed
}

Examples

// Get all published posts
const { entries: posts } = await getEmDashCollection("posts", {
	status: "published",
});

// Get latest 5 posts
const { entries: latest } = await getEmDashCollection("posts", {
	limit: 5,
	status: "published",
});

// Filter by taxonomy
const { entries: newsPosts } = await getEmDashCollection("posts", {
	status: "published",
	where: { category: "news" },
});

// Handle errors
const { entries, error } = await getEmDashCollection("posts");
if (error) {
	return new Response("Server error", { status: 500 });
}

getEmDashEntry()

Obter uma única entrada por slug ou ID.

import { getEmDashEntry } from "emdash";

const { entry: post, error } = await getEmDashEntry("posts", "my-post-slug");

if (!post) {
	return Astro.redirect("/404");
}

Parameters

O modo de pré-visualização é tratado automaticamente — o middleware deteta tokens _preview e serve rascunhos via AsyncLocalStorage. Não é necessário parâmetro options.

Returns

interface EntryResult<T> {
	entry: ContentEntry<T> | null; // null if not found
	error?: Error; // Set only for actual errors, not "not found"
	isPreview: boolean; // true if draft content is being served
}

Examples

// Get by slug
const { entry: post } = await getEmDashEntry("posts", "hello-world");

// Get by ID
const { entry: post } = await getEmDashEntry("posts", "01HXK5MZSN0FVXT2Q3KPRT9M7D");

// Preview is automatic — isPreview is true when a valid _preview token is present
const { entry, isPreview, error } = await getEmDashEntry("posts", slug);

// Handle errors vs not-found
if (error) {
	return new Response("Server error", { status: 500 });
}
if (!entry) {
	return Astro.redirect("/404");
}

Content Types

ContentEntry

A entrada devolvida pelas funções de consulta:

interface ContentEntry<T = Record<string, unknown>> {
	id: string;
	data: T;
	edit: EditProxy; // Visual editing annotations
}

O proxy edit fornece anotações para edição visual. Espalhe-o pelos elementos para edição inline: {...entry.edit.title}. Em produção não produz saída.

O objeto data contém todos os campos de conteúdo mais os campos de sistema:

• id — Identificador único
• slug — Identificador adequado a URL
• status — "draft" | "published" | "archived"
• createdAt — Carimbo de data/hora ISO
• updatedAt — Carimbo de data/hora ISO
• publishedAt — Carimbo ISO ou null
• Mais todos os campos personalizados definidos no esquema da coleção

Database Functions

createDatabase()

Criar uma ligação à base de dados.

import { createDatabase } from "emdash";

const db = createDatabase({ url: "file:./data.db" });

runMigrations()

Executar migrações pendentes.

import { createDatabase, runMigrations } from "emdash";

const db = createDatabase({ url: "file:./data.db" });
const { applied } = await runMigrations(db);
console.log(`Applied ${applied.length} migrations`);

getMigrationStatus()

Verificar o estado das migrações.

import { createDatabase, getMigrationStatus } from "emdash";

const db = createDatabase({ url: "file:./data.db" });
const status = await getMigrationStatus(db);
// { applied: ["0001_core", ...], pending: [] }

Repositories

Acesso de baixo nível aos dados através de repositórios.

ContentRepository

import { ContentRepository, createDatabase } from "emdash";

const db = createDatabase({ url: "file:./data.db" });
const repo = new ContentRepository(db);

// Find many
const { items, nextCursor } = await repo.findMany("posts", {
	limit: 10,
	where: { status: "published" },
});

// Find by ID
const post = await repo.findById("posts", "01HXK5MZSN...");

// Create
const newPost = await repo.create({
	type: "posts",
	slug: "new-post",
	data: { title: "New Post", content: [] },
	status: "draft",
});

// Update
const updated = await repo.update("posts", "01HXK5MZSN...", {
	data: { title: "Updated Title" },
});

// Delete
await repo.delete("posts", "01HXK5MZSN...");

MediaRepository

import { MediaRepository, createDatabase } from "emdash";

const db = createDatabase({ url: "file:./data.db" });
const repo = new MediaRepository(db);

// List media
const { items } = await repo.findMany({ limit: 20 });

// Get by ID
const media = await repo.findById("01HXK5MZSN...");

// Create (after upload)
const newMedia = await repo.create({
	filename: "photo.jpg",
	mimeType: "image/jpeg",
	size: 12345,
	storageKey: "uploads/photo.jpg",
});

Schema Registry

Gestão programática do esquema.

import { SchemaRegistry, createDatabase } from "emdash";

const db = createDatabase({ url: "file:./data.db" });
const registry = new SchemaRegistry(db);

// List collections
const collections = await registry.listCollections();

// Get collection with fields
const postsSchema = await registry.getCollectionWithFields("posts");

// Create collection
await registry.createCollection({
	slug: "products",
	label: "Products",
	labelSingular: "Product",
	supports: ["drafts", "revisions"],
});

// Add field
await registry.createField("products", {
	slug: "price",
	label: "Price",
	type: "number",
	required: true,
});

Preview System

generatePreviewToken()

Gerar um token de pré-visualização para rascunhos.

import { generatePreviewToken } from "emdash";

const token = await generatePreviewToken({
	contentId: "posts:01HXK5MZSN...",
	secret: process.env.EMDASH_ADMIN_SECRET,
	expiresIn: 3600, // 1 hour
});

verifyPreviewToken()

Verificar um token de pré-visualização.

import { verifyPreviewToken } from "emdash";

const result = await verifyPreviewToken({
	token,
	secret: process.env.EMDASH_ADMIN_SECRET,
});

if (result.valid) {
	const { cid, exp, iat } = result.payload;
	// cid is "collection:id" format, e.g. "posts:my-draft-post"
}

isPreviewRequest()

Verificar se o pedido inclui um token de pré-visualização.

import { isPreviewRequest, getPreviewToken } from "emdash";

if (isPreviewRequest(Astro.request)) {
	const token = getPreviewToken(Astro.request);
	// Verify and show preview content
}

Content Converters

Converter entre Portable Text e ProseMirror.

import { prosemirrorToPortableText, portableTextToProsemirror } from "emdash";

// From ProseMirror (editor) to Portable Text (storage)
const portableText = prosemirrorToPortableText(prosemirrorDoc);

// From Portable Text to ProseMirror
const prosemirrorDoc = portableTextToProsemirror(portableText);

Site Settings

import { getSiteSettings, getSiteSetting } from "emdash";

// Get all settings
const settings = await getSiteSettings();

// Get single setting
const title = await getSiteSetting("siteTitle");

As definições são só de leitura na API de runtime. Use a API de administração para as atualizar.

Menus

import { getMenu, getMenus } from "emdash";

// Get all menus
const menus = await getMenus();

// Get specific menu with items
const primaryMenu = await getMenu("primary");

if (primaryMenu) {
	primaryMenu.items.forEach(item => {
		console.log(item.label, item.url);
		// Nested items for dropdowns
		item.children.forEach(child => console.log("  -", child.label));
	});
}

Taxonomies

import { getTaxonomyTerms, getTerm, getEntryTerms, getEntriesByTerm } from "emdash";

// Get all terms for a taxonomy (tree structure for hierarchical)
const categories = await getTaxonomyTerms("category");

// Get single term
const news = await getTerm("category", "news");

// Get terms assigned to a content entry
const postCategories = await getEntryTerms("posts", "post-123", "category");

// Get entries with a specific term
const newsPosts = await getEntriesByTerm("posts", "category", "news");

Widget Areas

import { getWidgetArea, getWidgetAreas } from "emdash";

// Get all widget areas
const areas = await getWidgetAreas();

// Get specific widget area with widgets
const sidebar = await getWidgetArea("sidebar");

if (sidebar) {
	sidebar.widgets.forEach(widget => {
		console.log(widget.type, widget.title);
	});
}

Sections

import { getSection, getSections, getSectionCategories } from "emdash";

// Get all sections
const sections = await getSections();

// Filter sections
const heroes = await getSections({ category: "hero" });
const themeSections = await getSections({ source: "theme" });
const results = await getSections({ search: "newsletter" });

// Get single section
const cta = await getSection("newsletter-cta");

// Get categories
const categories = await getSectionCategories();

Search

import { search, searchCollection } from "emdash";

// Global search across collections
const results = await search("hello world", {
	collections: ["posts", "pages"],
	status: "published",
	limit: 20,
});

// Results include snippets with highlights
results.forEach(result => {
	console.log(result.title);
	console.log(result.snippet); // Contains <mark> tags
	console.log(result.score);
});

// Collection-specific search
const posts = await searchCollection("posts", "typescript", {
	limit: 10,
});

Error Handling

O EmDash exporta classes de erro para falhas específicas:

import {
  EmDashDatabaseError,
  EmDashValidationError,
  EmDashStorageError,
  SchemaError,
} from "emdash";

try {
  await repo.create({ ... });
} catch (error) {
  if (error instanceof EmDashValidationError) {
    console.error("Validation failed:", error.message);
  }
  if (error instanceof SchemaError) {
    console.error("Schema error:", error.code, error.details);
  }
}