From df5ae7ebbee0a3d4de82cf8892144bec150f3aa4 Mon Sep 17 00:00:00 2001
From: Kumpelinus <kumpelinus@jat.de>
Date: Mon, 10 Mar 2025 13:07:16 +0100
Subject: [PATCH] Implement a to_html method for FormattedText

Also fix a small issue with ansi formatting where it duplicated
text.
---
 azalea-chat/src/component.rs | 49 +++++++++++++++++++++++++++++++++++-
 azalea-chat/src/style.rs     | 40 +++++++++++++++++++++++++++++
 2 files changed, 88 insertions(+), 1 deletion(-)

diff --git a/azalea-chat/src/component.rs b/azalea-chat/src/component.rs
index e96ead43..c60132b8 100644
--- a/azalea-chat/src/component.rs
+++ b/azalea-chat/src/component.rs
@@ -107,7 +107,10 @@ impl FormattedText {
         for component in self.clone().into_iter() {
             let component_text = match &component {
                 Self::Text(c) => c.text.to_string(),
-                Self::Translatable(c) => c.to_string(),
+                Self::Translatable(c) => match c.read() {
+                    Ok(c) => c.to_string(),
+                    Err(_) => c.key.to_string(),
+                },
             };
 
             let component_style = &component.get_base().style;
@@ -125,6 +128,50 @@ impl FormattedText {
 
         built_string
     }
+
+    pub fn to_html(&self) -> String {
+        // default the default_style to white if it's not set
+        self.to_html_with_custom_style(&DEFAULT_STYLE)
+    }
+
+    pub fn to_html_with_custom_style(&self, default_style: &Style) -> String {
+        let mut html_output = String::new();
+        let mut running_style = default_style.clone();
+
+        for component in self.clone().into_iter() {
+            let component_style = &component.get_base().style;
+            // Calculate the effective style by merging the running style with the component's style.
+            let effective_style = running_style.merged_with(component_style);
+            let style_string = effective_style.get_html_style();
+
+            // Get the component text and replace newlines with <br>
+            let component_text = match &component {
+                Self::Text(c) => c.text.to_string(),
+                Self::Translatable(c) => match c.read() {
+                    Ok(text) => text.to_string(),
+                    Err(_) => c.key.to_string(),
+                },
+            }.replace("\n", "<br>");
+
+            // Append the styled span for this component.
+            html_output.push_str(&format!(
+                "<span style=\"{}\">{}</span>",
+                style_string, component_text
+            ));
+
+            // Update the running style:
+            // If the component requests a reset, revert to default.
+            if component_style.reset {
+                running_style = default_style.clone();
+            } else {
+                running_style.apply(component_style);
+            }
+        }
+
+        html_output
+    }
+
+
 }
 
 impl IntoIterator for FormattedText {
diff --git a/azalea-chat/src/style.rs b/azalea-chat/src/style.rs
index 26fa2633..133bae9f 100644
--- a/azalea-chat/src/style.rs
+++ b/azalea-chat/src/style.rs
@@ -559,6 +559,20 @@ impl Style {
         }
     }
 
+    /// Returns a new style that is a merge of self and other.
+    /// For any field that `other` does not specify (is None), self’s value is used.
+    pub fn merged_with(&self, other: &Style) -> Style {
+        Style {
+            color: other.color.clone().or(self.color.clone()),
+            bold: other.bold.or(self.bold),
+            italic: other.italic.or(self.italic),
+            underlined: other.underlined.or(self.underlined),
+            strikethrough: other.strikethrough.or(self.strikethrough),
+            obfuscated: other.obfuscated.or(self.obfuscated),
+            reset: other.reset, // if reset is true in the new style, that takes precedence
+        }
+    }
+
     /// Apply a ChatFormatting to this style
     pub fn apply_formatting(&mut self, formatting: &ChatFormatting) {
         match *formatting {
@@ -576,6 +590,32 @@ impl Style {
             }
         }
     }
+
+    pub fn get_html_style(&self) -> String {
+        let mut style = String::new();
+        if let Some(color) = &self.color {
+            style.push_str(&format!("color: {};", color.format_value()));
+        }
+        if let Some(bold) = self.bold {
+            style.push_str(&format!("font-weight: {};", if bold { "bold" } else { "normal" }));
+        }
+        if let Some(italic) = self.italic {
+            style.push_str(&format!("font-style: {};", if italic { "italic" } else { "normal" }));
+        }
+        if let Some(underlined) = self.underlined {
+            style.push_str(&format!("text-decoration: {};", if underlined { "underline" } else { "none" }));
+        }
+        if let Some(strikethrough) = self.strikethrough {
+            style.push_str(&format!("text-decoration: {};", if strikethrough { "line-through" } else { "none" }));
+        }
+        if let Some(obfuscated) = self.obfuscated {
+            if obfuscated {
+                style.push_str("filter: blur(2px);");
+            }
+        }
+
+        style
+    }
 }
 
 #[cfg(feature = "simdnbt")]