(Unicode C++) Microsoft Teams OAuth2 Client Credentials Authentication

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Demonstrates how to authenticate with OAuth 2.0 using the client credentials grant type.

Note: This example uses the new "Integrated OAuth2 Client Credentials" feature introduced in Chilkat v9.5.0.96.

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#include <CkHttpW.h>
#include <CkJsonObjectW.h>
#include <CkHttpResponseW.h>

void ChilkatSample(void)
    {
    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    bool success;
    CkHttpW http;

    // Provide the information needed for Chilkat to automatically fetch the OAuth2.0 
    // access token as needed.
    // This is the new "Integrated OAuth2 Client Credentials" feature introduced in Chilkat v9.5.0.96.  
    CkJsonObjectW jsonOAuthCC;

    // --------------------------------------------------------------------------------------------------------
    // You'll need to have registered an app in Azure beforehand.
    // 
    // Note: Creating a Team requires the following Application permissions:
    // Team.Create, Teamwork.Migrate.All, Group.ReadWrite.All**, Directory.ReadWrite.All**
    // 
    // See How to Create an Azure App Registration for OAuth 2.0 Client Credentials
    // --------------------------------------------------------------------------------------------------------

    // Use the values from your App Registration in Azure.
    jsonOAuthCC.UpdateString(L"client_id",L"e1cd2318-xxxx-4916-bfd6-xxxxxxxxxxxx");
    jsonOAuthCC.UpdateString(L"client_secret",L"K.d8Q~RoJxxxxvCj_u_xxxxxxxxxxxxxxxxxxxxx");

    // You'll always use this scope for client credentials, because the allowed actions
    // are determined by the App Permissions defined when you registered the app in Azure.
    jsonOAuthCC.UpdateString(L"scope",L"https://graph.microsoft.com/.default");

    // The token endpoint includes your tenant ID.  Use your tenant ID (not the tenant ID shown here).
    jsonOAuthCC.UpdateString(L"token_endpoint",L"https://login.microsoftonline.com/112d7ed6-71bf-4eba-a866-738364321bfc/oauth2/v2.0/token");

    // Provide the OAuth2 information. Chilkat will use this information to automatically fetch the OAuth2 access token as needed,
    http.put_AuthToken(jsonOAuthCC.emit());

    // ------------------------------------------------------------------------------
    // To create a Microsoft Team, we want to send an HTTP request like the following:
    // 
    // Note: The following is the minimal JSON for a request using Applicaton permissions (i.e. the access token retrieved using the client credentials grant).
    // 
    // POST https://graph.microsoft.com/v1.0/teams
    // Content-Type: application/json
    // 
    // {
    //    "template@odata.bind":"https://graph.microsoft.com/v1.0/teamsTemplates('standard')",
    //    "displayName":"My Sample Team",
    //    "description":"My Sample Teams Description",
    //    "members":[
    //       {
    //          "@odata.type":"#microsoft.graph.aadUserConversationMember",
    //          "roles":[
    //             "owner"
    //          ],
    //          "user@odata.bind":"https://graph.microsoft.com/v1.0/users('0040b377-61d8-43db-94f5-81374122dc7e')"
    //       }
    //    ]
    // }

    CkJsonObjectW json;
    json.UpdateString(L"\"template@odata.bind\"",L"https://graph.microsoft.com/v1.0/teamsTemplates('standard')");
    json.UpdateString(L"displayName",L"My Sample Team");
    json.UpdateString(L"description",L"My Sample Teams Description");
    json.UpdateString(L"members[0].\"@odata.type\"",L"#microsoft.graph.aadUserConversationMember");
    json.UpdateString(L"members[0].roles[0]",L"owner");
    json.UpdateString(L"members[0].\"user@odata.bind\"",L"https://graph.microsoft.com/v1.0/users('4ee732c3-322e-4a6b-b729-2fd1eb5c6004')");

    json.put_EmitCompact(false);
    wprintf(L"%s\n",json.emit());

    http.SetRequestHeader(L"Content-type",L"application/json");

    CkHttpResponseW *resp = http.PostJson3(L"https://graph.microsoft.com/v1.0/teams",L"application/json",json);
    if (http.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    // A successful response is indicated by a 202 response status code and an empty response body.
    wprintf(L"Response Status Code: %d\n",resp->get_StatusCode());
    wprintf(L"Response Body:\n");
    wprintf(L"%s\n",resp->bodyStr());

    if (resp->get_StatusCode() >= 400) {
        wprintf(L"Response Header:\n");
        wprintf(L"%s\n",resp->header());
        wprintf(L"Failed.\n");
    }

    delete resp;
    }