agrynco
aba4173827
Share template keys across email and push with independent editors and revisions. Render localized actions and preserve version-one delivery. Ref: IT-1627
57 lines
3.0 KiB
C#
57 lines
3.0 KiB
C#
using System.Globalization;
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using System.Text.RegularExpressions;
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using HrynCo.NotificationService.Contracts.Messages;
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using HrynCo.NotificationService.DAL.Abstract.Templates;
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namespace HrynCo.NotificationService.Worker.Services.Push;
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public static partial class PushTemplateRenderer
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{
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public static RenderedPushMessageData Render(PushTemplateDefinition template, SendPushMessageData message)
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{
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if (message.Version != 2 || !PushMessageValidator.IsValidContent(message))
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throw new EmailTemplateWriteException("Invalid version 2 push template data.", false);
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var data = message.TemplateData!;
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var language = template.Languages.SingleOrDefault(l => l.LanguageCode == message.LanguageCode)
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?? template.Languages.SingleOrDefault(l => l.LanguageCode == "en")
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?? throw new EmailTemplateWriteException("Push template language and English fallback are missing.", false);
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PushTemplateValidation.Validate(template);
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ValidateRequiredBindings(template, data.Bindings);
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var actions = PushTemplateActionValidation.Parse(language.ActionsJson);
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return new RenderedPushMessageData(message,
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RenderText(language.Title, data.Bindings, 100),
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RenderText(language.Body, data.Bindings, 500),
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actions.DefaultAction is null ? null : ResolveAction(actions.DefaultAction, null, data),
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actions.Buttons.Select(b => ResolveAction(b.Action,
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RenderText(b.Label, data.Bindings, 100), data)).ToList());
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}
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private static void ValidateRequiredBindings(PushTemplateDefinition template, IReadOnlyDictionary<string, string> bindings)
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{
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foreach (var variable in template.Variables.Where(v => v.Required))
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if (!bindings.TryGetValue(variable.Name, out var value) || string.IsNullOrWhiteSpace(value))
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throw new EmailTemplateWriteException("A required push binding is missing.", false);
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}
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private static RenderedPushAction ResolveAction(string key, string? label, PushTemplateData data)
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{
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if (!data.Actions.TryGetValue(key, out var metadata) || metadata is null)
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throw new EmailTemplateWriteException("A configured push action is missing from message metadata.", false);
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return new RenderedPushAction(key, metadata.ObjectId, label);
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}
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private static string RenderText(string template, IReadOnlyDictionary<string, string> bindings, int limit)
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{
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var value = Placeholder().Replace(template, match => bindings.GetValueOrDefault(match.Groups[1].Value) ?? "");
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if (string.IsNullOrWhiteSpace(value))
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throw new EmailTemplateWriteException("Rendered push text is empty.", false);
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if (value.Length <= limit) return value;
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var starts = StringInfo.ParseCombiningCharacters(value);
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var end = starts.LastOrDefault(offset => offset <= limit - 1);
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return value[..end] + "…";
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}
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[GeneratedRegex(@"\{\{([^{}]+)\}\}")]
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private static partial Regex Placeholder();
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}
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