page: fix backlinks() and transclusions() to work for missing and orp…

…haned pages

Fixes #76
Fixes #77

src/page.ts

@@ -265,12 +265,8 @@ export default function (bot: Mwn): MwnPageStatic {
 					lhlimit: 'max',
 				})
 				.then((jsons) => {
-					let pages = jsons.reduce((pages, json) => pages.concat(json.query.pages), []);
-					let page = pages[0];
-					if (page.missing) {
-						return Promise.reject(new MwnError.MissingPage());
-					}
-					return page.linkshere.map((pg: ApiPage) => pg.title);
+					let pages = jsons.reduce((pages, json) => pages.concat(json.query.pages), [] as ApiPage[]);
+					return (pages[0].linkshere || []).map((pg) => pg.title);
 				});
 		}
 
@@ -285,12 +281,8 @@ export default function (bot: Mwn): MwnPageStatic {
 					tilimit: 'max',
 				})
 				.then((jsons) => {
-					let pages = jsons.reduce((pages, json) => pages.concat(json.query.pages), []);
-					let page = pages[0];
-					if (page.missing) {
-						return Promise.reject(new MwnError.MissingPage());
-					}
-					return page.transcludedin.map((pg: ApiPage) => pg.title);
+					let pages = jsons.reduce((pages, json) => pages.concat(json.query.pages), [] as ApiPage[]);
+					return (pages[0].transcludedin || []).map((pg) => pg.title);
 				});
 		}
 

tests/page.test.js

@@ -101,13 +101,27 @@ describe('Page', async function () {
 		});
 	});
 
+	it('backlinks for non-existing page', function () {
+		return new bot.Page('29wdijopsk239esijd123').backlinks().then((backlinks) => {
+			expect(backlinks).to.be.instanceOf(Array);
+			expect(backlinks.length).to.equal(0);
+		});
+	});
+
 	it('transclusions', function () {
 		return page.transclusions().then((transclusions) => {
 			expect(transclusions).to.be.instanceOf(Array);
 			expect(transclusions.length).to.be.gte(1);
 		});
 	});
 
+	it('transclusions for non-existing page', function () {
+		return new bot.Page('29wdijopsk239esijd123').transclusions().then((transclusions) => {
+			expect(transclusions).to.be.instanceOf(Array);
+			expect(transclusions.length).to.equal(0);
+		});
+	});
+
 	it('history', function () {
 		return page.history().then((history) => {
 			expect(history).to.be.instanceOf(Array);