Delphi DLL

WordPress Create Tag

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Demonstrates how to create a new tag in Wordpress, or to find the ID of an existing tag. Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, HttpResponse, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
json: HCkJsonObject;
resp: HCkHttpResponse;
jResp: HCkJsonObject;

begin
success := False;

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

http := CkHttp_Create();

// Use your WordPress login, such as "admin", not the application name.
CkHttp_putLogin(http,'wp_username');
// Use the application password, such as "Nths RwVH eDJ4 weNZ orMN jabq"
// See WordPress Application Passwords Plugin
CkHttp_putPassword(http,'app_password');
CkHttp_putBasicAuth(http,True);

// Create the tag "ChatGPT" if it does not already exist.
json := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'name','ChatGPT');

// This will create the tag if it does not yet exist.
// If the tag already exists, then a 400 status code is returned.
// If the tag deoes not yet exist, then a 201 status code is returned.
resp := CkHttpResponse_Create();
success := CkHttp_HttpJson(http,'POST','https://cknotes.com/wp-json/wp/v2/tags',json,'application/json',resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

jResp := CkJsonObject_Create();
CkJsonObject_Load(jResp,CkHttpResponse__bodyStr(resp));

// Check if the tag already exists..
if (CkHttpResponse_getStatusCode(resp) = 400) then
  begin
    if (CkJsonObject_HasMember(jResp,'code') = True) then
      begin
        if (CkJsonObject_StringOfEquals(jResp,'code','term_exists',True) = True) then
          begin
            // The tag already exists.
            Memo1.Lines.Add('The tag already exists.');
            Memo1.Lines.Add('Tag ID: ' + IntToStr(CkJsonObject_IntOf(jResp,'data.term_id')));
            Exit;
          end;
      end;

    // Fall through to check for errors.
  end;

// Check for errors.
if (CkHttpResponse_getStatusCode(resp) <> 201) then
  begin
    Memo1.Lines.Add(CkHttpResponse__bodyStr(resp));
    Memo1.Lines.Add('status code = ' + IntToStr(CkHttpResponse_getStatusCode(resp)));
    Exit;
  end;

// We get here if the tag was created..
Memo1.Lines.Add('The tag was created.');
Memo1.Lines.Add('Tag ID = ' + IntToStr(CkJsonObject_IntOf(jResp,'id')));

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

end;