Fast DotNetCore Notion Integration

Notion.cs

using Notion.Client;

namespace NotionQuickBlog.Data
{
    public static class Notion
    {
        public static string? Token => Environment.GetEnvironmentVariable("NOTION_TOKEN");
        static NotionInstance? instance;
        public static NotionInstance Instance => instance!=null ? instance : (instance=new NotionInstance());
        public static NotionClient Client => Instance.client;
        public static T? GetProp<T>(this Page page, string propName) where T : PropertyValue {
            var prop = page.Properties.ContainsKey(propName) ? page.Properties[propName] : null;
            if(prop==null) return null;
            return (T)prop;
        }
        public static string GetEmail(this Page page, string property="Email"){
            var prop = page.GetProp<EmailPropertyValue>(property);
            return prop!=null ? prop.Email : string.Empty;
        }
        public static string GetText(this Page page, string property="Text"){
            var prop = page.GetProp<RichTextPropertyValue>(property);
            if(prop==null || prop.RichText.Count==0){
                return string.Empty;
            }
            return prop.RichText.First().PlainText;
        }
        public static string GetUrl(this Page page, string property="URL"){
            var prop = page.GetProp<UrlPropertyValue>(property);
            return prop!=null ? prop.Url : string.Empty;
        }
        public static string GetTitle(this Page page, string property="Name"){
            var prop = page.GetProp<TitlePropertyValue>(property);
            if(prop==null || prop.Title.Count==0){
                return string.Empty;
            }
            return prop.Title.First().PlainText;
        }
        public static int GetInteger(this Page page, string property="Number"){
            var prop = page.GetProp<NumberPropertyValue>(property);
            return prop!=null ? Convert.ToInt32(prop.Number) : 0;
        }
        public static T? GetEnum<T>(this Page page, string property="Select") where T : Enum {
            var prop = page.GetProp<SelectPropertyValue>(property);
            if(prop==null || prop.Select==null || prop.Select.Name==null){
                return default(T);
            }
            return (T)Enum.Parse(typeof(T), prop.Select.Name);
        }
        public static string BaseToString(this RichTextBase text){
            if(string.IsNullOrEmpty(text.PlainText) && text is RichTextText){
                return ((RichTextText)text).Text.Content;
            }
            return text.PlainText;
        }
        public static TitlePropertyValue ToTitlePropertyValue(this string? text){
            return new TitlePropertyValue(){
                Title = new List<RichTextBase>(){
                    new RichTextText { Text = new Text { Content = text } }
                }
            };
        }
        public static RichTextPropertyValue ToRichTextPropertyValue(this string? text){
            if(string.IsNullOrEmpty(text)) return new RichTextPropertyValue(){
                    RichText = new List<RichTextBase>()
                };
            return new RichTextPropertyValue(){
                RichText = new List<RichTextBase>(){
                   new RichTextText { Text = new Text { Content = text } }
                }
            };
        }
        public static UrlPropertyValue ToUrlPropertyValue(this string? text){
            return new UrlPropertyValue(){
                Url = text
            };
        }
        public static EmailPropertyValue ToEmailPropertyValue(this string? text){
            return new EmailPropertyValue(){
                Email = text
            };
        }
        public static NumberPropertyValue ToNumberPropertyValue(this int number){
            return new NumberPropertyValue(){
                Number = number
            };
        }
        public static SelectPropertyValue ToSelectPropertyValue<T>(this T value) where T : Enum {
            return new SelectPropertyValue(){
                Select = new SelectOption(){
                    Name = value.ToString()
                }
            };
        }
    }
    public class NotionInstance{
        public NotionClient client;
        public NotionInstance() {
            client = NotionClientFactory.Create(new ClientOptions{
                AuthToken = Notion.Token
            });
        }
    }
}