(C) Microsoft Teams OAuth2 Client Credentials Authentication

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Note: This example requires Chilkat v11.0.0 or greater.

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#include <C_CkHttp.h>
#include <C_CkJsonObject.h>
#include <C_CkHttpResponse.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkHttp http;
    HCkJsonObject jsonOAuthCC;
    HCkJsonObject json;
    HCkHttpResponse resp;

    success = FALSE;

    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    http = CkHttp_Create();

    // 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.  
    jsonOAuthCC = CkJsonObject_Create();

    // --------------------------------------------------------------------------------------------------------
    // 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.
    CkJsonObject_UpdateString(jsonOAuthCC,"client_id","e1cd2318-xxxx-4916-bfd6-xxxxxxxxxxxx");
    CkJsonObject_UpdateString(jsonOAuthCC,"client_secret","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.
    CkJsonObject_UpdateString(jsonOAuthCC,"scope","https://graph.microsoft.com/.default");

    // The token endpoint includes your tenant ID.  Use your tenant ID (not the tenant ID shown here).
    CkJsonObject_UpdateString(jsonOAuthCC,"token_endpoint","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,
    CkHttp_putAuthToken(http,CkJsonObject_emit(jsonOAuthCC));

    // ------------------------------------------------------------------------------
    // 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 Team�s Description",
    //    "members":[
    //       {
    //          "@odata.type":"#microsoft.graph.aadUserConversationMember",
    //          "roles":[
    //             "owner"
    //          ],
    //          "user@odata.bind":"https://graph.microsoft.com/v1.0/users('0040b377-61d8-43db-94f5-81374122dc7e')"
    //       }
    //    ]
    // }

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

    CkJsonObject_putEmitCompact(json,FALSE);
    printf("%s\n",CkJsonObject_emit(json));

    CkHttp_SetRequestHeader(http,"Content-type","application/json");

    resp = CkHttpResponse_Create();
    success = CkHttp_HttpJson(http,"POST","https://graph.microsoft.com/v1.0/teams",json,"application/json",resp);
    if (success == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkJsonObject_Dispose(jsonOAuthCC);
        CkJsonObject_Dispose(json);
        CkHttpResponse_Dispose(resp);
        return;
    }

    // A successful response is indicated by a 202 response status code and an empty response body.
    printf("Response Status Code: %d\n",CkHttpResponse_getStatusCode(resp));
    printf("Response Body:\n");
    printf("%s\n",CkHttpResponse_bodyStr(resp));

    if (CkHttpResponse_getStatusCode(resp) >= 400) {
        printf("Response Header:\n");
        printf("%s\n",CkHttpResponse_header(resp));
        printf("Failed.\n");
    }



    CkHttp_Dispose(http);
    CkJsonObject_Dispose(jsonOAuthCC);
    CkJsonObject_Dispose(json);
    CkHttpResponse_Dispose(resp);

    }