0.0.1-alpha.3

crates/knowledge-domain-lib/src/content_family.rs

@@ -0,0 +1,13 @@
+// file: crates/knowledge-domain-lib/src/content_family.rs
+// version: 1
+
+//! Content-family identities owned by the Knowledge domain.
+
+/// Semantic family of knowledge content.
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
+pub enum ContentFamily {
+    Pgr,
+    Howto,
+    Snippet,
+    ProjectLocal,
+}

crates/knowledge-domain-lib/src/lib.rs

@@ -1,8 +1,16 @@
 // file: crates/knowledge-domain-lib/src/lib.rs
-// version: 1
+// version: 2
 
-//! Domain boundary for SaseDev Knowledge.
+//! Shared domain contracts for SaseDev Knowledge.
 //!
-//! The crate is intentionally minimal in `0.0.1-alpha.2`: it establishes ownership of shared
-//! domain contracts without introducing the Git/synchronization contracts reserved for the next
-//! tranche.
+//! The crate owns content-family and source identities that are independent of HTTP, PostgreSQL,
+//! forge providers and concrete Git implementations.
+
+mod content_family;
+mod source;
+
+pub use crate::content_family::ContentFamily;
+pub use crate::source::{ContentSource, SourceId, SourceIdError};
+
+#[cfg(test)]
+mod unit_tests;

crates/knowledge-domain-lib/src/source.rs

@@ -0,0 +1,68 @@
+// file: crates/knowledge-domain-lib/src/source.rs
+// version: 1
+
+//! Source identities independent of repository and forge providers.
+
+/// Error returned when constructing an invalid source identifier.
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub enum SourceIdError {
+    /// The identifier is empty or contains only whitespace.
+    Empty,
+}
+
+impl std::fmt::Display for crate::SourceIdError {
+    fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            crate::SourceIdError::Empty => return formatter.write_str("source identifier must not be empty"),
+        }
+    }
+}
+
+impl std::error::Error for crate::SourceIdError {}
+
+/// Stable logical identifier of one configured content source.
+#[derive(Clone, Debug, Eq, Hash, PartialEq)]
+pub struct SourceId(String);
+
+impl crate::SourceId {
+    /// Build a source identifier without imposing a fixed repository count or provider syntax.
+    pub fn new(value: &str) -> Result<crate::SourceId, crate::SourceIdError> {
+        if value.trim().is_empty() {
+            return Err(crate::SourceIdError::Empty);
+        }
+        return Ok(crate::SourceId(value.to_owned()));
+    }
+
+    /// Return the identifier as text.
+    pub fn as_str(&self) -> &str {
+        return self.0.as_str();
+    }
+}
+
+/// One logical content source associated with a semantic family.
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub struct ContentSource {
+    id: crate::SourceId,
+    family: crate::ContentFamily,
+}
+
+impl crate::ContentSource {
+    /// Build a content source from a textual source identifier.
+    pub fn new(id: &str, family: crate::ContentFamily) -> Result<crate::ContentSource, crate::SourceIdError> {
+        let source_id = match crate::SourceId::new(id) {
+            Ok(value) => value,
+            Err(error) => return Err(error),
+        };
+        return Ok(crate::ContentSource { id: source_id, family });
+    }
+
+    /// Return the logical source identifier.
+    pub fn id(&self) -> &crate::SourceId {
+        return &self.id;
+    }
+
+    /// Return the semantic content family.
+    pub fn family(&self) -> crate::ContentFamily {
+        return self.family;
+    }
+}

crates/knowledge-domain-lib/src/unit_tests.rs

@@ -0,0 +1,20 @@
+// file: crates/knowledge-domain-lib/src/unit_tests.rs
+// version: 1
+
+#[test]
+fn source_id_rejects_empty_values() {
+    assert_eq!(crate::SourceId::new("   "), Err(crate::SourceIdError::Empty));
+    return;
+}
+
+#[test]
+fn content_sources_are_not_limited_to_three_repositories() {
+    let sources = [
+        crate::ContentSource::new("pgr", crate::ContentFamily::Pgr),
+        crate::ContentSource::new("howtos", crate::ContentFamily::Howto),
+        crate::ContentSource::new("snippets", crate::ContentFamily::Snippet),
+        crate::ContentSource::new("project-extra", crate::ContentFamily::ProjectLocal),
+    ];
+    assert!(sources.iter().all(Result::is_ok));
+    return;
+}