[pitboss] phase 21: Track M.3 — ScheduledJob + GraphQLResolver + WebSocket + Middleware + Migration

src/dynamic/framework/adapters/scheduled_cron.rs

@@ -0,0 +1,146 @@
+//! Phase 21 (Track M.3) — Node cron scheduled-job adapter.
+//!
+//! Fires when the surrounding source imports a JavaScript cron library
+//! (`node-cron`, `cron`, `node-schedule`) and the function body invokes
+//! a job-scheduling callee.  The binding's [`EntryKind::ScheduledJob`]
+//! is stamped with a best-effort `schedule` extracted from the source
+//! (a `cron.schedule('* * * * *', fn)` literal); a missing literal
+//! falls back to `None`.
+
+use crate::dynamic::framework::{FrameworkAdapter, FrameworkBinding};
+use crate::evidence::EntryKind;
+use crate::summary::FuncSummary;
+use crate::symbol::Lang;
+
+pub struct ScheduledCronAdapter;
+
+const ADAPTER_NAME: &str = "scheduled-cron";
+
+fn callee_is_cron(name: &str) -> bool {
+    let last = name.rsplit_once('.').map(|(_, s)| s).unwrap_or(name);
+    matches!(
+        last,
+        "schedule" | "CronJob" | "scheduleJob" | "RecurrenceRule" | "job"
+    )
+}
+
+fn source_imports_cron(file_bytes: &[u8]) -> bool {
+    const NEEDLES: &[&[u8]] = &[
+        b"require('node-cron')",
+        b"require(\"node-cron\")",
+        b"from 'node-cron'",
+        b"from \"node-cron\"",
+        b"require('cron')",
+        b"require(\"cron\")",
+        b"from 'cron'",
+        b"from \"cron\"",
+        b"require('node-schedule')",
+        b"require(\"node-schedule\")",
+        b"from 'node-schedule'",
+        b"from \"node-schedule\"",
+    ];
+    NEEDLES
+        .iter()
+        .any(|n| file_bytes.windows(n.len()).any(|w| w == *n))
+}
+
+fn extract_schedule(file_bytes: &[u8]) -> Option<String> {
+    let text = std::str::from_utf8(file_bytes).unwrap_or("");
+    for needle in [
+        "cron.schedule('",
+        "cron.schedule(\"",
+        "schedule.scheduleJob('",
+        "schedule.scheduleJob(\"",
+        "new CronJob('",
+        "new CronJob(\"",
+    ] {
+        if let Some(idx) = text.find(needle) {
+            let after = &text[idx + needle.len()..];
+            let close = if needle.ends_with('"') { '"' } else { '\'' };
+            if let Some(end) = after.find(close) {
+                return Some(after[..end].to_owned());
+            }
+        }
+    }
+    None
+}
+
+impl FrameworkAdapter for ScheduledCronAdapter {
+    fn name(&self) -> &'static str {
+        ADAPTER_NAME
+    }
+
+    fn lang(&self) -> Lang {
+        Lang::JavaScript
+    }
+
+    fn detect(
+        &self,
+        summary: &FuncSummary,
+        _ast: tree_sitter::Node<'_>,
+        file_bytes: &[u8],
+    ) -> Option<FrameworkBinding> {
+        let matches_call = super::any_callee_matches(summary, callee_is_cron);
+        let matches_source = source_imports_cron(file_bytes);
+        if matches_call || matches_source {
+            Some(FrameworkBinding {
+                adapter: ADAPTER_NAME.to_owned(),
+                kind: EntryKind::ScheduledJob {
+                    schedule: extract_schedule(file_bytes),
+                },
+                route: None,
+                request_params: Vec::new(),
+                response_writer: None,
+                middleware: Vec::new(),
+            })
+        } else {
+            None
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn parse_js(src: &[u8]) -> tree_sitter::Tree {
+        let mut parser = tree_sitter::Parser::new();
+        let lang = tree_sitter::Language::from(tree_sitter_javascript::LANGUAGE);
+        parser.set_language(&lang).unwrap();
+        parser.parse(src, None).unwrap()
+    }
+
+    #[test]
+    fn fires_on_node_cron_schedule() {
+        let src: &[u8] = b"const cron = require('node-cron');\n\
+            function tick(payload) { console.log(payload); }\n\
+            cron.schedule('*/5 * * * *', tick);\n";
+        let tree = parse_js(src);
+        let summary = FuncSummary {
+            name: "tick".into(),
+            ..Default::default()
+        };
+        let binding = ScheduledCronAdapter
+            .detect(&summary, tree.root_node(), src)
+            .expect("node-cron binds");
+        assert_eq!(binding.adapter, "scheduled-cron");
+        if let EntryKind::ScheduledJob { schedule } = binding.kind {
+            assert_eq!(schedule.as_deref(), Some("*/5 * * * *"));
+        } else {
+            panic!("expected ScheduledJob");
+        }
+    }
+
+    #[test]
+    fn skips_plain_function() {
+        let src: &[u8] = b"function add(a, b) { return a + b; }\n";
+        let tree = parse_js(src);
+        let summary = FuncSummary {
+            name: "add".into(),
+            ..Default::default()
+        };
+        assert!(ScheduledCronAdapter
+            .detect(&summary, tree.root_node(), src)
+            .is_none());
+    }
+}