refactor(api): APIのコードを移動

src/api.ts

+import peg from 'pegjs';
+import { MfmNode, MfmPlainNode } from './node';
+import { stringifyNode, stringifyTree } from './util';
+
+const parser: peg.Parser = require('./parser');
+
+export function parse(input: string): MfmNode[] {
+	const nodes = parser.parse(input, { startRule: 'fullParser' });
+	return nodes;
+}
+
+export function parsePlain(input: string): MfmPlainNode[] {
+	const nodes = parser.parse(input, { startRule: 'plainParser' });
+	return nodes;
+}
+
+export function toString(tree: MfmNode[]): string
+export function toString(node: MfmNode): string
+export function toString(node: MfmNode | MfmNode[]): string {
+	if (Array.isArray(node)) {
+		return stringifyTree(node);
+	}
+	else {
+		return stringifyNode(node);
+	}
+}
+
+export function inspect(tree: MfmNode[], action: (node: MfmNode) => void): void {
+	for (const node of tree) {
+		action(node);
+		if (node.children != null) {
+			inspect(node.children, action);
+		}
+	}
+}
+
+export function extract(nodes: MfmNode[], type: (MfmNode['type'] | MfmNode['type'][])): MfmNode[] {
+	function predicate(node: MfmNode, type: (MfmNode['type'] | MfmNode['type'][])): boolean {
+		if (Array.isArray(type)) {
+			return (type.some(i => i == node.type));
+		}
+		else {
+			return (type == node.type);
+		}
+	}
+
+	const dest = [] as MfmNode[];
+	for (const node of nodes) {
+		if (predicate(node, type)) {
+			dest.push(node);
+		}
+		if (node.children != null) {
+			dest.push(...extract(node.children, type));
+		}
+	}
+
+	return dest;
+}

src/index.ts

-import peg from 'pegjs';
-import { MfmNode, MfmPlainNode } from './node';
-import { stringifyNode, stringifyTree } from './util';
-const parser: peg.Parser = require('./parser');
-
-export function parse(input: string): MfmNode[] {
-	const nodes = parser.parse(input, { startRule: 'fullParser' });
-	return nodes;
-}
-
-export function parsePlain(input: string): MfmPlainNode[] {
-	const nodes = parser.parse(input, { startRule: 'plainParser' });
-	return nodes;
-}
-
-export function toString(tree: MfmNode[]): string
-export function toString(node: MfmNode): string
-export function toString(node: MfmNode | MfmNode[]): string {
-	if (Array.isArray(node)) {
-		return stringifyTree(node);
-	}
-	else {
-		return stringifyNode(node);
-	}
-}
-
-export function inspect(tree: MfmNode[], action: (node: MfmNode) => void): void {
-	for (const node of tree) {
-		action(node);
-		if (node.children != null) {
-			inspect(node.children, action);
-		}
-	}
-}
-
-export function extract(nodes: MfmNode[], type: (MfmNode['type'] | MfmNode['type'][])): MfmNode[] {
-	function predicate(node: MfmNode, type: (MfmNode['type'] | MfmNode['type'][])): boolean {
-		if (Array.isArray(type)) {
-			return (type.some(i => i == node.type));
-		}
-		else {
-			return (type == node.type);
-		}
-	}
-
-	const dest = [] as MfmNode[];
-	for (const node of nodes) {
-		if (predicate(node, type)) {
-			dest.push(node);
-		}
-		if (node.children != null) {
-			dest.push(...extract(node.children, type));
-		}
-	}
-
-	return dest;
-}
+export {
+	parse,
+	parsePlain,
+	toString,
+	inspect,
+	extract
+} from './api';
 
 export { NodeType } from './node';