commit 2e66ec1faddfdb57e69889461b85801be5774944
Author: James Pace <jpace121@gmail.com>
Date:   Sat Jun 13 20:53:18 2026 -0400

    Init commit.

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..4cc1bea
--- /dev/null
+++ b/Cargo.lock
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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "anyhow"
+version = "1.0.102"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f202df86484c868dbad7eaa557ef785d5c66295e41b460ef922eca0723b842c"
+
+[[package]]
+name = "j7s_diagnostics"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "limbo_graph",
+]
+
+[[package]]
+name = "limbo_graph"
+version = "0.1.0"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..d20e9c5
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "j7s_diagnostics"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+anyhow = { version = "1.0", default-features = false }
+limbo_graph = { path = "../limbo_graph" }
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..96399a2
--- /dev/null
+++ b/src/lib.rs
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+// Take in list of diagnostic statuses
+// For each status:
+// 1. Parse name into level, splitting on /
+// 2. Cycle through current tree for each level from above.
+//    1. If level from above is missing add it.
+//    2. If present, keep looking down.
+// Once all elements added, start at the edge nodes and travel up
+// to mark levels of parent nodes.
+// Depth first search from top to build new vector to return.
+
+// TODO: Remove anyhow.
+#![no_std]
+#![allow(unused_imports)]
+extern crate alloc;
+
+use anyhow::anyhow;
+
+use alloc::borrow::ToOwned;
+use alloc::collections::BTreeMap;
+use alloc::collections::VecDeque;
+use alloc::string::String;
+use alloc::vec::Vec;
+
+#[derive(Clone, PartialEq)]
+pub enum DiagnosticLevel {
+    OK,
+    WARN,
+    ERROR,
+    STALE,
+}
+
+#[derive(Clone)]
+pub struct DiagnosticStatus {
+    level: DiagnosticLevel,
+    name: String,
+    message: String,
+    hardware_id: String,
+    values: BTreeMap<String, String>,
+}
+
+impl DiagnosticStatus {
+    pub fn new(
+        level: DiagnosticLevel,
+        name: String,
+        message: String,
+        hardware_id: String,
+        values: BTreeMap<String, String>,
+    ) -> Self {
+        Self {
+            level: level,
+            name: name,
+            message: message,
+            hardware_id: hardware_id,
+            values: values,
+        }
+    }
+
+    pub fn from_name(name: String) -> Self {
+        let level = DiagnosticLevel::STALE;
+        let message = "";
+        let hardware_id = "";
+        let values = BTreeMap::<String, String>::new();
+
+        Self::new(
+            level,
+            name,
+            message.to_owned(),
+            hardware_id.to_owned(),
+            values,
+        )
+    }
+
+    pub fn level(&self) -> DiagnosticLevel {
+        self.level.clone()
+    }
+
+    pub fn name(&self) -> String {
+        self.name.clone()
+    }
+
+    pub fn message(&self) -> String {
+        self.message.clone()
+    }
+
+    pub fn hardware_id(&self) -> String {
+        self.hardware_id.clone()
+    }
+
+    pub fn keys(&self) -> Vec<String> {
+        self.values.keys().cloned().collect()
+    }
+
+    pub fn value(&self, key: &str) -> Option<String> {
+        let value = self.values.get(key);
+        if value.is_none() {
+            return None;
+        }
+        return Some(value.unwrap().clone());
+    }
+
+    pub fn name_is_basic(&self) -> bool {
+        // A basic name is one that doesn't have slashes in it other than the
+        // first character.
+        let is_not_basic = self
+            .name
+            .strip_prefix("/")
+            .unwrap_or(&self.name)
+            .contains("/");
+        return !is_not_basic;
+    }
+
+    pub fn get_parent_names(&self) -> Vec<String> {
+        if self.name_is_basic() {
+            return Vec::<String>::new();
+        }
+
+        let split: Vec<String> = self
+            .name()
+            .split("/")
+            .map(|x| x.to_owned())
+            .filter(|x| !x.is_empty())
+            .collect();
+        return split
+            .iter()
+            .take(split.len() - 1)
+            .map(|x| x.to_owned())
+            .collect();
+    }
+
+    pub fn get_child_name(&self) -> String {
+        if self.name_is_basic() {
+            return self.name();
+        }
+        let split: Vec<String> = self.name().split("/").map(|x| x.to_owned()).collect();
+        return split.last().unwrap().clone();
+    }
+
+    pub fn copy_with_child_name(&self) -> Self {
+        let mut to_return: Self = self.clone();
+        to_return.name = self.get_child_name();
+        return to_return;
+    }
+}
+// TODO: Make this not public.
+#[derive(Clone)]
+pub enum DiagnosticNode {
+    Root,
+    DiagnosticStatus(DiagnosticStatus),
+}
+impl limbo_graph::NodeValue for DiagnosticNode {}
+
+impl DiagnosticNode {
+    pub fn is_root(&self) -> bool {
+        match self {
+            Self::Root => true,
+            _ => false,
+        }
+    }
+
+    pub fn value(&self) -> Option<&DiagnosticStatus> {
+        match self {
+            Self::DiagnosticStatus(value) => Some(value),
+            _ => None,
+        }
+    }
+}
+
+pub struct DiagnosticGraph {
+    graph: limbo_graph::Graph<DiagnosticNode>,
+}
+
+impl DiagnosticGraph {
+    pub fn new() -> Self {
+        Self {
+            graph: limbo_graph::Graph::<DiagnosticNode>::new(DiagnosticNode::Root),
+        }
+    }
+
+    pub fn root(&self) -> limbo_graph::Key {
+        return self.graph.root_key();
+    }
+
+    pub fn value_of(&self, key: &limbo_graph::Key) -> anyhow::Result<DiagnosticStatus> {
+        let graph_value = self.graph.value_of(key)?;
+        let result = graph_value.value();
+        if result.is_none() {
+            return Err(anyhow!("Can't get value of root key."));
+        }
+        Ok(result.unwrap().clone())
+    }
+
+    pub fn children_of(&self, key: &limbo_graph::Key) -> anyhow::Result<Vec<limbo_graph::Key>> {
+        let result = self.graph.children_of(key)?;
+        Ok(result)
+    }
+
+    pub fn add_status(&mut self, status: DiagnosticStatus) -> anyhow::Result<()> {
+        // If I'm basic I just need to be added as a child of the root.
+        if status.name_is_basic() {
+            self.graph.add(
+                DiagnosticNode::DiagnosticStatus(status),
+                self.graph.root_key(),
+            )?;
+            return Ok(());
+        }
+        // Find this status' child name and parent's names
+        let parent_names = status.get_parent_names();
+
+        let mut cur_key = self.graph.root_key();
+
+        'parent_loop: for parent_name in parent_names.iter() {
+            let children = self.graph.children_of(&cur_key)?;
+            if children.len() == 0 {
+                let holder_for_parent = DiagnosticStatus::from_name(parent_name.clone());
+                cur_key = self
+                    .graph
+                    .add(DiagnosticNode::DiagnosticStatus(holder_for_parent), cur_key)?;
+                continue 'parent_loop;
+            }
+            'child_loop: for child in children {
+                let child_node = self.graph.value_of(&child)?;
+                if child_node.is_root() {
+                    // child node can't be root, but we'll catch here anyway.
+                    continue 'child_loop;
+                }
+                if child_node.value().unwrap().name() == *parent_name {
+                    // The child node matched the parent we were looking for.
+                    // Continue to find the next parent, with this key as the
+                    // current key.
+                    cur_key = child;
+                    continue 'parent_loop;
+                }
+            }
+            // Parent wasn't any of the children. Add it and look for next parent.
+            let holder_for_parent = DiagnosticStatus::from_name(parent_name.clone());
+            cur_key = self
+                .graph
+                .add(DiagnosticNode::DiagnosticStatus(holder_for_parent), cur_key)?;
+        }
+        // We've updated all the parents, so we can add ourselves now.
+        self.graph.add(
+            DiagnosticNode::DiagnosticStatus(status.copy_with_child_name()),
+            cur_key,
+        )?;
+
+        Ok(())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn basic_diagnostic_creation() {
+        let level = DiagnosticLevel::OK;
+        let name = "/a/b/c";
+        let message = "I'm ok";
+        let hardware_id = "";
+        let values = BTreeMap::<String, String>::new();
+
+        let diag_status = DiagnosticStatus::new(
+            level,
+            name.to_owned(),
+            message.to_owned(),
+            hardware_id.to_owned(),
+            values,
+        );
+        assert!(diag_status.level() == DiagnosticLevel::OK);
+    }
+
+    #[test]
+    fn diagnostic_name_parsing() {
+        let level = DiagnosticLevel::OK;
+        let name = "/a/b/c";
+        let message = "I'm ok";
+        let hardware_id = "";
+        let values = BTreeMap::<String, String>::new();
+
+        let diag_status = DiagnosticStatus::new(
+            level,
+            name.to_owned(),
+            message.to_owned(),
+            hardware_id.to_owned(),
+            values,
+        );
+
+        assert!(!diag_status.name_is_basic());
+
+        let parent_names = diag_status.get_parent_names();
+        let child_name = diag_status.get_child_name();
+        assert!(parent_names[0] == "a");
+        assert!(parent_names[1] == "b");
+        assert!(child_name == "c");
+    }
+
+    #[test]
+    fn add_one_to_graph() -> anyhow::Result<()> {
+        let level = DiagnosticLevel::OK;
+        let name = "/a/b/c";
+        let message = "I'm ok";
+        let hardware_id = "";
+        let values = BTreeMap::<String, String>::new();
+
+        let diag_status = DiagnosticStatus::new(
+            level,
+            name.to_owned(),
+            message.to_owned(),
+            hardware_id.to_owned(),
+            values,
+        );
+
+        let mut graph = DiagnosticGraph::new();
+        graph.add_status(diag_status)?;
+
+        let first_child_keys = graph.children_of(&graph.root())?;
+        assert!(first_child_keys.len() == 1);
+        let first_child_key = first_child_keys[0];
+        let first_child_value = graph.value_of(&first_child_key)?;
+        assert!(first_child_value.name() == "a");
+
+        let second_child_keys = graph.children_of(&first_child_key)?;
+        assert!(second_child_keys.len() == 1);
+        let second_child_key = second_child_keys[0];
+        let second_child_value = graph.value_of(&second_child_key)?;
+        assert!(second_child_value.name() == "b");
+
+        let third_child_keys = graph.children_of(&second_child_key)?;
+        assert!(third_child_keys.len() == 1);
+        let third_child_key = third_child_keys[0];
+        let third_child_value = graph.value_of(&third_child_key)?;
+        assert!(third_child_value.name() == "c");
+        assert!(third_child_value.level() == DiagnosticLevel::OK);
+
+        Ok(())
+    }
+}