Added SmartText and inheritors SmartPlainText and SmartEmbedText which will replace CREmbed in the future

src/NadekoBot/Common/SmartText/SmartEmbedText.cs

@@ -0,0 +1,96 @@
+using System;
+using Discord;
+using NadekoBot.Extensions;
+using NadekoBot.Services;
+
+namespace NadekoBot
+{
+    public sealed class SmartEmbedText : SmartText
+    {
+        public string PlainText { get; set; }
+        public string Title { get; set; }
+        public string Description { get; set; }
+        public string Url { get; set; }
+        public string Thumbnail { get; set; }
+        public string Image { get; set; }
+
+        public SmartTextEmbedAuthor Author { get; set; }
+        public SmartTextEmbedFooter Footer { get; set; }
+        public SmartTextEmbedField[] Fields { get; set; }
+
+        public uint Color { get; set; } = 7458112;
+
+        public bool IsValid =>
+            !string.IsNullOrWhiteSpace(Title) ||
+            !string.IsNullOrWhiteSpace(Description) ||
+            !string.IsNullOrWhiteSpace(Url) ||
+            !string.IsNullOrWhiteSpace(Thumbnail) ||
+            !string.IsNullOrWhiteSpace(Image) ||
+            (Footer != null && (!string.IsNullOrWhiteSpace(Footer.Text) || !string.IsNullOrWhiteSpace(Footer.IconUrl))) ||
+            (Fields != null && Fields.Length > 0);
+
+        public EmbedBuilder GetEmbed(IEmbedBuilderService eb)
+        {
+            var embed = new EmbedBuilder()
+                .WithColor(Color);
+
+            if (!string.IsNullOrWhiteSpace(Title))
+                embed.WithTitle(Title);
+
+            if (!string.IsNullOrWhiteSpace(Description))
+                embed.WithDescription(Description);
+
+            if (Url != null && Uri.IsWellFormedUriString(Url, UriKind.Absolute))
+                embed.WithUrl(Url);
+
+            if (Footer != null)
+            {
+                embed.WithFooter(efb =>
+                {
+                    efb.WithText(Footer.Text);
+                    if (Uri.IsWellFormedUriString(Footer.IconUrl, UriKind.Absolute))
+                        efb.WithIconUrl(Footer.IconUrl);
+                });
+            }
+
+            if (Thumbnail != null && Uri.IsWellFormedUriString(Thumbnail, UriKind.Absolute))
+                embed.WithThumbnailUrl(Thumbnail);
+
+            if (Image != null && Uri.IsWellFormedUriString(Image, UriKind.Absolute))
+                embed.WithImageUrl(Image);
+
+            if (Author != null && !string.IsNullOrWhiteSpace(Author.Name))
+            {
+                if (!Uri.IsWellFormedUriString(Author.IconUrl, UriKind.Absolute))
+                    Author.IconUrl = null;
+                if (!Uri.IsWellFormedUriString(Author.Url, UriKind.Absolute))
+                    Author.Url = null;
+
+                embed.WithAuthor(Author.Name, Author.IconUrl, Author.Url);
+            }
+
+            if (Fields != null)
+            {
+                foreach (var f in Fields)
+                {
+                    if (!string.IsNullOrWhiteSpace(f.Name) && !string.IsNullOrWhiteSpace(f.Value))
+                        embed.AddField(f.Name, f.Value, f.Inline);
+                }
+            }
+
+            return embed;
+        }
+
+        public void NormalizeFields()
+        {
+            if (Fields != null && Fields.Length > 0)
+            {
+                foreach (var f in Fields)
+                {
+                    f.Name = f.Name.TrimTo(256);
+                    f.Value = f.Value.TrimTo(1024);
+                }
+            }
+        }
+    }
+}

src/NadekoBot/Common/SmartText/SmartPlainText.cs

@@ -0,0 +1,23 @@
+namespace NadekoBot
+{
+    public sealed class SmartPlainText : SmartText
+    {
+        public string Text { get; set; }
+
+        public SmartPlainText(string text)
+        {
+            Text = text;
+        }
+
+        public static implicit operator SmartPlainText(string input)
+            => new SmartPlainText(input);
+
+        public static implicit operator string(SmartPlainText input)
+            => input.Text;
+
+        public override string ToString()
+        {
+            return Text;
+        }
+    }
+}

src/NadekoBot/Common/SmartText/SmartText.cs

@@ -0,0 +1,37 @@
+using Newtonsoft.Json;
+
+namespace NadekoBot
+{
+    // todo 3.3 check if saving embeds in db has IsEmbed field, to prevent rechecking and generating exceptions on every use
+    public abstract class SmartText
+    {
+        public bool IsEmbed => this is SmartEmbedText;
+        public bool IsPlainText => this is SmartPlainText;
+
+        public static SmartText CreateFrom(string input)
+        {
+            if (string.IsNullOrWhiteSpace(input) || !input.Trim().StartsWith("{"))
+            {
+                return new SmartPlainText(input);
+            }
+
+            try
+            {
+                var smartEmbedText = JsonConvert.DeserializeObject<SmartEmbedText>(input);
+
+                smartEmbedText.NormalizeFields();
+
+                if (!smartEmbedText.IsValid)
+                {
+                    return new SmartPlainText(input);
+                }
+
+                return smartEmbedText;
+            }
+            catch
+            {
+                return new SmartPlainText(input);
+            }
+        }
+    }
+}

src/NadekoBot/Common/SmartText/SmartTextEmbedAuthor.cs

@@ -0,0 +1,13 @@
+using Newtonsoft.Json;
+
+namespace NadekoBot
+{
+    public class SmartTextEmbedAuthor
+    {
+        public string Name { get; set; }
+        public string IconUrl { get; set; }
+        [JsonProperty("icon_url")]
+        private string Icon_Url { set => IconUrl = value; }
+        public string Url { get; set; }
+    }
+}

src/NadekoBot/Common/SmartText/SmartTextEmbedField.cs

@@ -0,0 +1,9 @@
+namespace NadekoBot
+{
+    public class SmartTextEmbedField
+    {
+        public string Name { get; set; }
+        public string Value { get; set; }
+        public bool Inline { get; set; }
+    }
+}

src/NadekoBot/Common/SmartText/SmartTextEmbedFooter.cs

@@ -0,0 +1,12 @@
+using Newtonsoft.Json;
+
+namespace NadekoBot
+{
+    public class SmartTextEmbedFooter
+    {
+        public string Text { get; set; }
+        public string IconUrl { get; set; }
+        [JsonProperty("icon_url")]
+        private string Icon_Url { set => IconUrl = value; }
+    }
+}