Implemented customizable email templates
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@ -1,11 +1,12 @@
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#See https://aka.ms/customizecontainer to learn how to customize your debug container and how Visual Studio uses this Dockerfile to build your images for faster debugging.
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FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
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RUN mkdir -p /app/files && chown app /app/files
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RUN mkdir -p /configuration && chown app /configuration
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USER app
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WORKDIR /app
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RUN mkdir ./files && chown app ./files
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VOLUME /app/files
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VOLUME /configuration
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WORKDIR /app
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EXPOSE 8080
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FROM mcr.microsoft.com/dotnet/sdk:8.0 AS build
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@ -20,11 +20,11 @@
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var builder = WebApplication.CreateBuilder(args);
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builder.Configuration
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.AddJsonFile("/configuration/config.json", true, false)
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.AddYamlFile("/configuration/config.yml", true, false)
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.AddTomlFile("/configuration/config.toml", true, false)
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.AddIniFile( "/configuration/config.ini", true, false)
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.AddXmlFile( "/configuration/config.xml", true, false)
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.AddJsonFile(Path.Combine(FileSystemService.ConfigurationDirectory, "config.json"), true, false)
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.AddYamlFile(Path.Combine(FileSystemService.ConfigurationDirectory, "config.yml"), true, false)
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.AddTomlFile(Path.Combine(FileSystemService.ConfigurationDirectory, "config.toml"), true, false)
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.AddIniFile( Path.Combine(FileSystemService.ConfigurationDirectory, "config.ini"), true, false)
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.AddXmlFile( Path.Combine(FileSystemService.ConfigurationDirectory, "config.xml"), true, false)
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.AddEnvironmentVariables("WAVE_");
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builder.Services.AddRazorComponents().AddInteractiveServerComponents();
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@ -128,6 +128,7 @@
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logMessages.Add("No Email provider configured.");
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}
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builder.Services.AddSingleton<FileSystemService>();
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builder.Services.AddSingleton<EmailTemplateService>();
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builder.Services.AddHostedService<EmailBackgroundWorker>();
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@ -4,7 +4,6 @@
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using Microsoft.EntityFrameworkCore;
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using Microsoft.Extensions.Options;
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using MimeKit;
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using Mjml.Net;
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using Wave.Data;
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using Wave.Utilities;
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@ -33,6 +32,8 @@ public class EmailBackgroundWorker(ILogger<EmailBackgroundWorker> logger, IDbCon
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waitTime, now.AddMinutes(waitTime).LocalDateTime.ToString("u"));
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Timer = new Timer(DoWork, null, TimeSpan.FromMinutes(waitTime), TimeSpan.FromMinutes(15));
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TemplateService.TryCreateDefaultTemplates();
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return Task.CompletedTask;
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}
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@ -84,7 +85,10 @@ public class EmailBackgroundWorker(ILogger<EmailBackgroundWorker> logger, IDbCon
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newsletter.Article, new Uri(Customizations.AppUrl, UriKind.Absolute));
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string template = TemplateService.Process("newsletter", new Dictionary<EmailTemplateService.Constants, object?>{
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{EmailTemplateService.Constants.BrowserLink, articleLink},
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{EmailTemplateService.Constants.ContentLogo, "https://blog.winter-software.com/img/logo.png"},
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{EmailTemplateService.Constants.ContentLogo, (!string.IsNullOrWhiteSpace(Customizations.LogoLink) ?
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new Uri(Customizations.LogoLink) :
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new Uri(host, "/img/logo.png"))
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.AbsoluteUri},
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{EmailTemplateService.Constants.ContentTitle, newsletter.Article.Title},
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{EmailTemplateService.Constants.ContentBody, newsletter.Article.BodyHtml},
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{EmailTemplateService.Constants.EmailUnsubscribeLink, "[[<__UNSUBSCRIBE__>]]"}
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@ -4,14 +4,15 @@
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namespace Wave.Services;
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public partial class EmailTemplateService(ILogger<EmailTemplateService> logger, IDistributedCache tokenCache) {
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public partial class EmailTemplateService(ILogger<EmailTemplateService> logger, IDistributedCache tokenCache, FileSystemService fileSystem) {
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public enum Constants {
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BrowserLink, HomeLink, ContentLogo, ContentTitle, ContentBody, EmailUnsubscribeLink
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}
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private ILogger<EmailTemplateService> Logger { get; } = logger;
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private IMjmlRenderer Renderer { get; } = new MjmlRenderer();
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private MjmlRenderer Renderer { get; } = new();
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private IDistributedCache TokenCache { get; } = tokenCache;
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private FileSystemService FileSystem { get; } = fileSystem;
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private Regex TokenMatcher { get; } = MyRegex();
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@ -50,58 +51,19 @@ public enum Constants {
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});
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}
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public void TryCreateDefaultTemplates() {
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FileSystem.GetEmailTemplate("default", DefaultTemplates["default"]);
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FileSystem.GetEmailTemplate("newsletter", DefaultTemplates["newsletter"]);
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}
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public string Process(string templateName, Dictionary<Constants, object?> data) {
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var options = new MjmlOptions {
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Beautify = false
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};
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string template = $"""
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<mjml>
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<mj-head>
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<mj-preview/>
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</mj-head>
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<mj-body>
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<mj-section>
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<mj-column>
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<mj-text align="center" font-size="13px" font-family="Ubuntu,Verdana">
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<a href="[[{Constants.BrowserLink}]]">Read in Browser</a></mj-text>
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</mj-column>
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</mj-section>
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<mj-section direction="rtl" padding-bottom="15px" padding-left="0px" padding-right="0px" padding-top="15px" padding="15px 0px 15px 0px">
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<mj-column vertical-align="middle" width="33%">
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<mj-image align="center" alt="" border-radius="0" border="none" container-background-color="transparent" height="auto" padding-bottom="5px" padding-left="5px" padding-right="5px" padding-top="5px" padding="5px 5px 5px 5px" href="[[{Constants.HomeLink}]]" src="[[{Constants.ContentLogo}]]"></mj-image>
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</mj-column>
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<mj-column vertical-align="middle" width="67%">
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<mj-text font-size="13px" font-family="Ubuntu,Verdana">
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<h1>[[{Constants.ContentTitle}]]</h1>
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</mj-text>
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</mj-column>
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</mj-section>
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<mj-section>
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<mj-column>
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<mj-divider border-width="1px"></mj-divider>
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</mj-column>
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</mj-section>
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<mj-section>
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<mj-column>
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<mj-text color="#55575d" font-size="13px" font-family="Ubuntu,Verdana">[[{Constants.ContentBody}]]</mj-text>
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</mj-column>
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</mj-section>
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<mj-section>
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<mj-column>
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<mj-divider border-width="1px"></mj-divider>
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</mj-column>
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</mj-section>
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<mj-section>
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<mj-column>
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<mj-text align="center" font-size="13px" font-family="Ubuntu,Verdana">
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<a href="[[{Constants.EmailUnsubscribeLink}]]">Unsubscribe</a>
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</mj-text>
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</mj-column>
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</mj-section>
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</mj-body>
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</mjml>
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""";
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string template = FileSystem.GetEmailTemplate(templateName,
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DefaultTemplates.TryGetValue(templateName, out string? s) ? s : null)
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?? throw new ApplicationException("Failed to retrieve mail template " + templateName + ".");
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template = TokenMatcher.Replace(template, t =>
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data.TryGetValue(Enum.Parse<Constants>(t.Value[2..^2], true), out object? v) ?
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@ -121,4 +83,96 @@ public enum Constants {
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[GeneratedRegex(@"(\[\[.*?\]\])",
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RegexOptions.IgnoreCase | RegexOptions.Compiled | RegexOptions.Singleline | RegexOptions.CultureInvariant)]
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private static partial Regex MyRegex();
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private Dictionary<string, string> DefaultTemplates { get; } = new() {
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{
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"default",
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$"""
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<mjml>
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<mj-head>
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<mj-preview />
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</mj-head>
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<mj-body>
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<mj-section direction="rtl" padding-bottom="5px" padding-left="0px" padding-right="0px" padding-top="15px" padding="15px 0px 5px 0px">
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<mj-column vertical-align="middle" width="33%">
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<mj-image align="center" alt="" border-radius="0" border="none" container-background-color="transparent" height="auto" padding-bottom="5px" padding-left="5px" padding-right="5px" padding-top="5px" padding="5px 5px 5px 5px" href="[[{Constants.HomeLink}]]" src="[[{Constants.ContentLogo}]]"></mj-image>
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</mj-column>
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<mj-column vertical-align="middle" width="67%">
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<mj-text font-size="13px" font-family="Ubuntu,Verdana">
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<h1>[[{Constants.ContentTitle}]]</h1>
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</mj-text>
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</mj-column>
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</mj-section>
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<mj-section padding-top="5px" padding-bottom="5px" padding="5px 0 5px 0">
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<mj-column>
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<mj-divider border-color="#9f9f9f" border-width="1px"></mj-divider>
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</mj-column>
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</mj-section>
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<mj-section>
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<mj-column>
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<mj-text color="#55575d" font-size="13px" font-family="Ubuntu,Verdana">[[{Constants.ContentBody}]]</mj-text>
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</mj-column>
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</mj-section>
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<mj-section padding-top="5px" padding-bottom="5px" padding="5px 0 5px 0">
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<mj-column>
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<mj-divider border-color="#9f9f9f" border-width="1px"></mj-divider>
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</mj-column>
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</mj-section>
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</mj-body>
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</mjml>
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"""
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},
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{
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"newsletter",
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$"""
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<mjml>
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<mj-head>
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<mj-preview />
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</mj-head>
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<mj-body>
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<mj-section>
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<mj-column>
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<mj-text align="center" font-size="13px" font-family="Ubuntu,Verdana">
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<a href="[[{Constants.BrowserLink}]]">Read in Browser</a>
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</mj-text>
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</mj-column>
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</mj-section>
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<mj-section direction="rtl" padding-bottom="5px" padding-left="0px" padding-right="0px" padding-top="15px" padding="15px 0px 5px 0px">
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<mj-column vertical-align="middle" width="33%">
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<mj-image align="center" alt="" border-radius="0" border="none" container-background-color="transparent" height="auto" padding-bottom="5px" padding-left="5px" padding-right="5px" padding-top="5px" padding="5px 5px 5px 5px" href="[[{Constants.HomeLink}]]" src="[[{Constants.ContentLogo}]]"></mj-image>
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</mj-column>
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<mj-column vertical-align="middle" width="67%">
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<mj-text font-size="13px" font-family="Ubuntu,Verdana">
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<h1>[[{Constants.ContentTitle}]]</h1>
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</mj-text>
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</mj-column>
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</mj-section>
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<mj-section padding-top="5px" padding-bottom="5px" padding="5px 0 5px 0">
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<mj-column>
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<mj-divider border-color="#9f9f9f" border-width="1px"></mj-divider>
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</mj-column>
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</mj-section>
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<mj-section>
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<mj-column>
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<mj-text color="#55575d" font-size="13px" font-family="Ubuntu,Verdana">[[{Constants.ContentBody}]]</mj-text>
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</mj-column>
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</mj-section>
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<mj-section padding-top="5px" padding-bottom="5px" padding="5px 0 5px 0">
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<mj-column>
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<mj-divider border-color="#9f9f9f" border-width="1px"></mj-divider>
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</mj-column>
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</mj-section>
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<mj-section>
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<mj-column>
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<mj-text align="center" font-size="13px" font-family="Ubuntu,Verdana">
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<a href="[[{Constants.EmailUnsubscribeLink}]]">Unsubscribe</a>
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</mj-text>
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</mj-column>
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</mj-section>
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</mj-body>
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</mjml>
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"""
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}
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};
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}
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55
Wave/Services/FileSystemService.cs
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55
Wave/Services/FileSystemService.cs
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@ -0,0 +1,55 @@
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using System.Text;
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namespace Wave.Services;
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public class FileSystemService(ILogger<FileSystemService> logger) {
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public const string ConfigurationDirectory = "/configuration";
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private ILogger<FileSystemService> Logger { get; } = logger;
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public async Task<string?> GetEmailTemplateAsync(string name, string? defaultTemplate = null) {
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string path = Path.Combine(ConfigurationDirectory, "templates", "email", name + ".mjml");
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if (!File.Exists(path)) {
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try {
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Directory.CreateDirectory(Path.GetDirectoryName(path)!);
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if (!string.IsNullOrWhiteSpace(defaultTemplate)) {
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await File.WriteAllTextAsync(path, defaultTemplate, Encoding.UTF8);
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}
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} catch (Exception ex) {
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Logger.LogError(ex, "File system access failed trying write default E-Mail template '{template}'", name);
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return defaultTemplate;
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}
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}
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try {
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return await File.ReadAllTextAsync(path, Encoding.UTF8);
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} catch (Exception ex) {
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Logger.LogError(ex, "File system access failed trying to retrieve E-Mail template '{template}'", name);
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return defaultTemplate;
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}
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}
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public string? GetEmailTemplate(string name, string? defaultTemplate = null) {
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string path = Path.Combine(ConfigurationDirectory, "templates", "email", name + ".mjml");
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if (!File.Exists(path)) {
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try {
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Directory.CreateDirectory(Path.GetDirectoryName(path)!);
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if (!string.IsNullOrWhiteSpace(defaultTemplate)) {
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File.WriteAllText(path, defaultTemplate, Encoding.UTF8);
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}
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} catch (Exception ex) {
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Logger.LogError(ex, "File system access failed trying write default E-Mail template '{template}'", name);
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return defaultTemplate;
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}
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}
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try {
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return File.ReadAllText(path, Encoding.UTF8);
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} catch (Exception ex) {
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Logger.LogError(ex, "File system access failed trying to retrieve E-Mail template '{template}'", name);
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return defaultTemplate;
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}
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}
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}
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