add 'prompthash' and 'negativeprompthash' to outpath builder

for #188

docs/Features/Webhooks.md

@@ -14,7 +14,7 @@ Webhook configuration comes in two parts: the URL, and the JSON data. For the UR
 
 ### Image Metadata In The JSON
 
-For some webhooks, eg the `Every Gen` Webhook, you can include image metadata in the JSON body. This uses `%tag%` syntax, and mostly follows the same rules as the `Output Path` setting for what you can fill in. For example, `%prompt%` can be used to fill the prompt. Unlike `Output Path`, this text won't be trimmed or formatted, other than escaped to fit within a JSON string.
+For some webhooks, eg the `Every Gen` Webhook, you can include image metadata in the JSON body. This uses `%tag%` syntax, and mostly follows the same rules as the `Output Path` setting for what you can fill in (refer to [User Settings - Path Format](/docs/User%20Settings.md#path-format)). For example, `%prompt%` can be used to fill the prompt. Unlike `Output Path`, this text won't be trimmed or formatted, other than escaped to fit within a JSON string.
 
 You may also use `%image%` to include the URL to an image. Be warned if `DoNotSave` is used this URL maybe a very large Base64 blob. This will use the `External URL` setting under `Server Configuration` to format the URL. Note that unless your server is externally accessible, this URL cannot be opened by anyone but you. This means for example you cannot embed the image onto a Discord message via the webhook, because Discord's servers cannot read the URL.
 

docs/User Settings.md

@@ -16,6 +16,8 @@
 - `[second]`: 2-digit second, eg 30
 - `[prompt]`: the prompt (often cut off by `MaxLenPerPart`)
 - `[negative_prompt]`: the negative prompt (often cut off by `MaxLenPerPart`)
+- `[prompthash]`: a short (8 character) SHA256 hash prefix of the prompt
+- `[negativeprompthash]`: a short (8 character) SHA256 hash prefix of the negative prompt
 - `[seed]`: the seed number parameter
 - `[cfg_scale]`: the CFG Scale parameter
 - `[width]`: the Width parameter

src/Accounts/User.cs

@@ -6,6 +6,7 @@ using SwarmUI.DataHolders;
 using SwarmUI.Utils;
 using SwarmUI.Text2Image;
 using FreneticUtilities.FreneticExtensions;
+using System.Security.Cryptography;
 
 namespace SwarmUI.Accounts;
 
@@ -271,10 +272,11 @@ public class User
             SkipFolders = LinkedUser?.Settings?.OutPathBuilder?.ModelPathsSkipFolders ?? false;
         }
 
+        /// <summary>Simplify a model filename appropriately in accordance with settings. Strips file extensions.</summary>
         public string SimplifyModel(string model)
         {
             model = model.Replace('\\', '/').Trim();
-            if (model.EndsWith(".safetensors") || model.EndsWith(".sft") || model.EndsWith(".ckpt"))
+            if (model.EndsWith(".ckpt") || T2IModel.NativelySupportedModelExtensions.Contains(model.AfterLast('.')))
             {
                 model = model.BeforeLast('.');
             }
@@ -285,6 +287,12 @@ public class User
             return model;
         }
 
+        /// <summary>Quick 8 character hash of some text.</summary>
+        public string QuickHash(string val)
+        {
+            return Utilities.BytesToHex(SHA256.HashData(val.EncodeUTF8())[0..4]);
+        }
+
         public string FillPartUnformatted(string part)
         {
             string data = part switch
@@ -298,7 +306,9 @@ public class User
                 "minute" => $"{Time.Minute:00}",
                 "second" => $"{Time.Second:00}",
                 "prompt" => UserInput.Get(T2IParamTypes.Prompt),
+                "prompthash" => QuickHash(UserInput.Get(T2IParamTypes.Prompt)),
                 "negative_prompt" => UserInput.Get(T2IParamTypes.NegativePrompt),
+                "negativeprompthash" => QuickHash(UserInput.Get(T2IParamTypes.NegativePrompt)),
                 "seed" => $"{UserInput.Get(T2IParamTypes.Seed)}",
                 "cfg_scale" => $"{UserInput.Get(T2IParamTypes.CFGScale)}",
                 "width" => $"{UserInput.GetImageWidth()}",