fix(commands): add csharp glue codegen binary, it was gitignored

crates/commands/src/bin/write_cs_glue.rs

@@ -0,0 +1,173 @@
+use std::{env, fmt::Write, fs, path::PathBuf, str::FromStr};
+
+use command_parser::{
+    parameter::{Parameter, ParameterKind},
+    token::Token,
+};
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let write_location = env::args()
+        .nth(1)
+        .expect("file location should be provided");
+    let write_location = PathBuf::from_str(&write_location).unwrap();
+
+    let commands = command_definitions::all().collect::<Vec<_>>();
+
+    let mut glue = String::new();
+
+    writeln!(&mut glue, "#nullable enable\n")?;
+    writeln!(&mut glue, "using PluralKit.Core;\n")?;
+    writeln!(&mut glue, "namespace PluralKit.Bot;\n")?;
+
+    let mut record_fields = String::new();
+    for command in &commands {
+        writeln!(
+            &mut record_fields,
+            r#"public record {command_name}({command_name}Params parameters, {command_name}Flags flags): Commands;"#,
+            command_name = command_callback_to_name(&command.cb),
+        )?;
+    }
+    let mut match_branches = String::new();
+    for command in &commands {
+        let mut command_params_init = String::new();
+        let command_params = find_parameters(&command.tokens);
+        for param in &command_params {
+            writeln!(
+                &mut command_params_init,
+                r#"{name} = await ctx.ParamResolve{extract_fn_name}("{name}") ?? throw new PKError("this is a bug"),"#,
+                name = param.name(),
+                extract_fn_name = get_param_param_ty(param.kind()),
+            )?;
+        }
+        let mut command_flags_init = String::new();
+        for flag in &command.flags {
+            if let Some(kind) = flag.get_value() {
+                writeln!(
+                    &mut command_flags_init,
+                    r#"{name} = await ctx.FlagResolve{extract_fn_name}("{name}"),"#,
+                    name = flag.get_name(),
+                    extract_fn_name = get_param_param_ty(kind),
+                )?;
+            } else {
+                writeln!(
+                    &mut command_flags_init,
+                    r#"{name} = ctx.Parameters.HasFlag("{name}"),"#,
+                    name = flag.get_name(),
+                )?;
+            }
+        }
+        write!(
+            &mut match_branches,
+            r#"
+            "{command_callback}" => new {command_name}(
+                new {command_name}Params {{ {command_params_init} }},
+                new {command_name}Flags {{ {command_flags_init} }}
+            ),
+            "#,
+            command_name = command_callback_to_name(&command.cb),
+            command_callback = command.cb,
+        )?;
+    }
+    write!(
+        &mut glue,
+        r#"
+        public abstract record Commands()
+        {{
+            {record_fields}
+
+            public static async Task<Commands?> FromContext(Context ctx)
+            {{
+                return ctx.Parameters.Callback() switch
+                {{
+                    {match_branches}
+                    _ => null,
+                }};
+            }}
+        }}
+        "#,
+    )?;
+    for command in &commands {
+        let mut command_params_fields = String::new();
+        let command_params = find_parameters(&command.tokens);
+        for param in &command_params {
+            writeln!(
+                &mut command_params_fields,
+                r#"public required {ty} {name};"#,
+                name = param.name(),
+                ty = get_param_ty(param.kind()),
+            )?;
+        }
+        let mut command_flags_fields = String::new();
+        for flag in &command.flags {
+            if let Some(kind) = flag.get_value() {
+                writeln!(
+                    &mut command_flags_fields,
+                    r#"public {ty}? {name};"#,
+                    name = flag.get_name(),
+                    ty = get_param_ty(kind),
+                )?;
+            } else {
+                writeln!(
+                    &mut command_flags_fields,
+                    r#"public required bool {name};"#,
+                    name = flag.get_name(),
+                )?;
+            }
+        }
+        write!(
+            &mut glue,
+            r#"
+            public class {command_name}Params
+            {{
+                {command_params_fields}
+            }}
+            public class {command_name}Flags
+            {{
+                {command_flags_fields}
+            }}
+            "#,
+            command_name = command_callback_to_name(&command.cb),
+        )?;
+    }
+    fs::write(write_location, glue)?;
+    Ok(())
+}
+
+fn command_callback_to_name(cb: &str) -> String {
+    cb.split("_")
+        .map(|w| w.chars().nth(0).unwrap().to_uppercase().collect::<String>() + &w[1..])
+        .collect()
+}
+
+fn get_param_ty(kind: ParameterKind) -> &'static str {
+    match kind {
+        ParameterKind::OpaqueString | ParameterKind::OpaqueStringRemainder => "string",
+        ParameterKind::MemberRef => "PKMember",
+        ParameterKind::SystemRef => "PKSystem",
+        ParameterKind::MemberPrivacyTarget => "MemberPrivacySubject",
+        ParameterKind::PrivacyLevel => "string",
+        ParameterKind::Toggle => "bool",
+    }
+}
+
+fn get_param_param_ty(kind: ParameterKind) -> &'static str {
+    match kind {
+        ParameterKind::OpaqueString | ParameterKind::OpaqueStringRemainder => "Opaque",
+        ParameterKind::MemberRef => "Member",
+        ParameterKind::SystemRef => "System",
+        ParameterKind::MemberPrivacyTarget => "MemberPrivacyTarget",
+        ParameterKind::PrivacyLevel => "PrivacyLevel",
+        ParameterKind::Toggle => "Toggle",
+    }
+}
+
+fn find_parameters(tokens: &[Token]) -> Vec<&Parameter> {
+    let mut result = Vec::new();
+    for token in tokens {
+        match token {
+            Token::Parameter(param) => result.push(param),
+            _ => {}
+        }
+    }
+    result
+}