chore: Remove depricated APIs

Author: JadedBlueEyes

src/exchange_rates.rs

@@ -222,14 +222,18 @@ pub struct ExchangeRateHandler {
     pub source: ExchangeRateSource,
 }
 
-impl fend_core::ExchangeRateFn for ExchangeRateHandler {
+impl fend_core::ExchangeRateFnV2 for ExchangeRateHandler {
     fn relative_to_base_currency(
         &self,
         currency: &str,
+        options: &fend_core::ExchangeRateFnV2Options,
     ) -> Result<f64, Box<dyn std::error::Error + Send + Sync + 'static>> {
         if !self.enable_internet_access {
             return Err(InternetAccessDisabledError.into());
         }
+        if options.is_preview() {
+            return Err(ExchangeRateSourceDisabledError.into());
+        }
         let exchange_rates = get_exchange_rates(self.source)?;
         for (c, rate) in exchange_rates {
             if currency == c {

src/main.rs

@@ -60,7 +60,7 @@ impl From<FendResult> for HistoryResult {
         Self {
             plain_result,
             spans,
-            is_unit: result.is_unit_type(),
+            is_empty: result.output_is_empty(),
             attrs: Attrs {
                 trailing_newline: result.has_trailing_newline(),
             },
@@ -72,7 +72,7 @@ impl From<FendResult> for HistoryResult {
 pub struct HistoryResult {
     plain_result: String,
     spans: Vec<(std::ops::Range<usize>, fend_core::SpanKind)>,
-    is_unit: bool, // is this the () type
+    is_empty: bool, // is this the () type
     attrs: Attrs,
 }
 #[derive(Clone, Debug, PartialEq, Eq)]
@@ -120,7 +120,7 @@ impl HistoryResult {
     /// be useful to hide these values.
     #[must_use]
     pub fn is_unit_type(&self) -> bool {
-        self.is_unit
+        self.is_empty
     }
 
     /// Returns whether or not the result should be outputted with a
@@ -143,7 +143,7 @@ fn app() -> Element {
     let mut context = use_signal(fend_core::Context::new);
     context.with_mut(|c| {
         let rates = exchange_rates.read();
-        c.set_exchange_rate_handler_v1(*rates);
+        c.set_exchange_rate_handler_v2(*rates);
         c.set_random_u32_fn(random_u32);
     });
 

src/prompt.rs

@@ -54,7 +54,7 @@ pub(crate) fn Prompt(
                     ..Default::default()
                 }
             },
-            if !preview.read().is_unit_type() {
+            if !preview.read().output_is_empty() {
                 label {
                     color: "white",
                     "{preview.read().get_main_result()}"