DD.WellWorkover.Cloud/AsbCloudInfrastructure/Services/Email/BaseFactory.cs

using AsbCloudApp.Data;
using AsbCloudApp.Exceptions;
using Microsoft.Extensions.Configuration;
using System;
using System.Configuration;
using System.IO;

namespace AsbCloudInfrastructure.Services.Email;


public class BaseFactory
{
    protected readonly string platformName;
    protected readonly string platformUrl;
    protected readonly string companyName;
    protected readonly string supportMail;

    public BaseFactory(IConfiguration configuration)
    {
        platformName = configuration.GetValue<string>("email:platformName")
            ?? throw new ConfigurationErrorsException("email:platformName не определен");

        platformUrl = configuration.GetValue<string>("email:platformUrl")
            ?? throw new ConfigurationErrorsException("email:platformUrl не определен");

        companyName = configuration.GetValue<string>("email:companyName")
            ?? throw new ConfigurationErrorsException("email:companyName не определен");

        supportMail = configuration.GetValue<string>("email:supportMail")
             ?? throw new ConfigurationErrorsException("email:supportMail не определен");
    }

    public static string GetOrEmptyImageBase64(string resourceFileName)
    {
        if (string.IsNullOrEmpty(resourceFileName))
            throw new ArgumentInvalidException(nameof(resourceFileName), "ResourceFileName doesn`t exist");

        var baseDir = Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location)
        ?? string.Empty;
        var resourcesDir = "Res";

        var logoFilePath = Path.Combine(baseDir, resourcesDir, resourceFileName);

        if (!File.Exists(logoFilePath))
        {
            System.Diagnostics.Trace.TraceWarning($"GetOrEmptyImageBase64(). File {logoFilePath} not found.");
            return string.Empty;
        }

        var imageBytes = File.ReadAllBytes(logoFilePath);
        var format = Path.GetExtension(resourceFileName).Trim('.');
        return "data:image/" + format + ";base64," + Convert.ToBase64String(imageBytes);
    }

    public static string MakeHref(string url, string text)
        => $"<a href=\"{url}\">{text}</a>";

    public string MakeSignatue()
    {
        var logo = GetOrEmptyImageBase64("logo_32.png");
        var sign = $"<br><br>---<br><img src=\"{logo}\"/><br>" +
        $"{companyName}<br>" +
        $"Это письмо сформировано автоматически.<br>" +
        $"Для получения помощи по работе на портале {platformName}" +
        $"обращайтесь по адресу {supportMail}";
        return sign;
    }

    public virtual string MakeSubject(WellDto well, string action)
        => $"{well.Deposit}, {well.Cluster}, {well.Caption}. {action}";
}