Added wiki sample

Author: Danny McCormick

samples/samples.json

@@ -4,5 +4,6 @@
     "creation",
     "task",
     "filecontainer",
-    "git"
+    "git",
+    "wiki"
 ]

samples/tsconfig.json

@@ -11,6 +11,7 @@
         "creation.ts",
         "task.ts",
         "filecontainer.ts",
-        "git.ts"
+        "git.ts",
+        "wiki.ts"
     ]
 }

samples/wiki.ts

@@ -0,0 +1,44 @@
+import * as common from './common';
+import * as nodeApi from 'azure-devops-node-api';
+
+import * as CoreApi from 'azure-devops-node-api/CoreApi'
+import * as CoreInterfaces from 'azure-devops-node-api/interfaces/CoreInterfaces'
+import * as WikiApi from 'azure-devops-node-api/WikiApi';
+import * as WikiInterfaces from 'azure-devops-node-api/interfaces/WikiInterfaces';
+
+export async function run() { 
+    let webApi: nodeApi.WebApi = await common.getWebApi();
+    let wikiApiObject: WikiApi.IWikiApi = await webApi.getWikiApi();
+    let coreApiObject: CoreApi.ICoreApi = await webApi.getCoreApi();
+
+    common.banner('Wiki Samples');
+    let project: string = common.getProject();
+    let projectObject: CoreInterfaces.TeamProject = await coreApiObject.getProject(project);
+    console.log('Project:', project);
+
+    common.heading('Get all wikis');
+    const wikis: WikiInterfaces.WikiV2[] = await wikiApiObject.getAllWikis(project);
+    console.log("Wikis", wikis.map((wiki) => wiki.name));
+
+    let wikiId: string;
+    if (wikis.length > 0) {
+        wikiId = wikis[0].id;
+    }
+    else {
+        common.heading("Create a wiki");
+        const wikiParams: WikiInterfaces.WikiCreateParametersV2 = <WikiInterfaces.WikiCreateParametersV2>{name: "Hello Wiki", projectId: projectObject.id};
+        const newWiki = await wikiApiObject.createWiki(wikiParams, project);
+        console.log("Wiki created:", newWiki.name);
+        wikiId = newWiki.id;
+    }
+
+    common.heading("Get the text from a wiki");
+    const textStream: NodeJS.ReadableStream = await wikiApiObject.getPageText(project, wikiId)
+    console.log("Wiki text", textStream.read().toString());
+
+    if (wikis.length == 0) {
+        common.heading("Delete the created wiki");
+        await wikiApiObject.deleteWiki(wikiId, project);
+        console.log("Wiki deleted");
+    }
+}