Small commit to add hybrid search and autoembedding

milli/src/prompt/error.rs

@@ -0,0 +1,56 @@
+use crate::error::FaultSource;
+
+#[derive(Debug, thiserror::Error)]
+#[error("{fault}: {kind}")]
+pub struct NewPromptError {
+    pub kind: NewPromptErrorKind,
+    pub fault: FaultSource,
+}
+
+impl From<NewPromptError> for crate::Error {
+    fn from(value: NewPromptError) -> Self {
+        crate::Error::UserError(crate::UserError::InvalidPrompt(value))
+    }
+}
+
+impl NewPromptError {
+    pub(crate) fn cannot_parse_template(inner: liquid::Error) -> NewPromptError {
+        Self { kind: NewPromptErrorKind::CannotParseTemplate(inner), fault: FaultSource::User }
+    }
+
+    pub(crate) fn invalid_fields_in_template(inner: liquid::Error) -> NewPromptError {
+        Self { kind: NewPromptErrorKind::InvalidFieldsInTemplate(inner), fault: FaultSource::User }
+    }
+}
+
+#[derive(Debug, thiserror::Error)]
+pub enum NewPromptErrorKind {
+    #[error("cannot parse template: {0}")]
+    CannotParseTemplate(liquid::Error),
+    #[error("template contains invalid fields: {0}. Only `doc.*`, `fields[i].name`, `fields[i].value` are supported")]
+    InvalidFieldsInTemplate(liquid::Error),
+}
+
+#[derive(Debug, thiserror::Error)]
+#[error("{fault}: {kind}")]
+pub struct RenderPromptError {
+    pub kind: RenderPromptErrorKind,
+    pub fault: FaultSource,
+}
+impl RenderPromptError {
+    pub(crate) fn missing_context(inner: liquid::Error) -> RenderPromptError {
+        Self { kind: RenderPromptErrorKind::MissingContext(inner), fault: FaultSource::User }
+    }
+}
+
+#[derive(Debug, thiserror::Error)]
+pub enum RenderPromptErrorKind {
+    #[error("missing field in document: {0}")]
+    MissingContext(liquid::Error),
+}
+
+impl From<RenderPromptError> for crate::Error {
+    fn from(value: RenderPromptError) -> Self {
+        crate::Error::UserError(crate::UserError::MissingDocumentField(value))
+    }
+}