Add macro for formatting RFC3339-timestamps

1 files changed, 19 insertions, 0 deletions

diff --git a/src/macro_processor/macro_processor.rs b/src/macro_processor/macro_processor.rs
index 7eb41cf..a5b6a59 100644
--- a/src/macro_processor/macro_processor.rs
+++ b/src/macro_processor/macro_processor.rs
@@ -218,6 +218,20 @@ fn smp_builtin_indent(
     Ok(String::new())
 }
 
+#[cfg(feature = "time")]
+fn smp_builtin_format_time(
+    _smp: &mut MacroProcessor,
+    macro_name: &str,
+    args: &mut [String],
+) -> Result<String, SMPError> {
+    if args.len() < 2 {
+        return Ok(macro_name.to_string());
+    }
+    let dt = chrono::DateTime::parse_from_rfc3339(&args[1])
+        .map_err(|_| SMPError::UnknownError(87, None))?;
+    Ok(format!("{}", dt.format(&args[0])))
+}
+
 /// Types of macros, this is to make it easy to store both functions and strings
 #[derive(Clone)]
 pub enum MacroType {
@@ -296,6 +310,11 @@ impl MacroProcessor {
             MacroType::Function(smp_builtin_indent),
         );
         self.define_macro(String::from("expr"), MacroType::Function(smp_builtin_expr));
+        #[cfg(feature = "time")]
+        self.define_macro(
+            String::from("format_time"),
+            MacroType::Function(smp_builtin_format_time),
+        );
         // format('Result id %d', 3282)
     }