canonrs-server 0.1.0

CanonRS server-side rendering support
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/// TreeNode - Pure hierarchical data structure
///
/// **Type:** Pure data (no UI, no logic)
/// **Purpose:** Represents hierarchical domain structure
#[derive(Clone, Debug, PartialEq, serde::Serialize, serde::Deserialize)]
pub struct TreeNode {
    /// Unique identifier
    pub id: String,

    /// Display label
    pub label: String,

    /// Node type (e.g., "workflow", "step", "user", "role")
    pub node_type: String,

    /// Optional icon
    pub icon: Option<String>,

    /// Child nodes
    pub children: Vec<TreeNode>,

    /// Whether node is expanded (UI state)
    pub expanded: bool,

    /// Whether node is checked (for multi-select)
    pub checked: bool,

    /// Optional metadata (domain-specific data)
    pub metadata: Option<String>,
}

impl TreeNode {
    pub fn new(
        id: impl Into<String>,
        label: impl Into<String>,
        node_type: impl Into<String>,
    ) -> Self {
        Self {
            id: id.into(),
            label: label.into(),
            node_type: node_type.into(),
            icon: None,
            children: Vec::new(),
            expanded: false,
            checked: false,
            metadata: None,
        }
    }

    pub fn with_icon(mut self, icon: impl Into<String>) -> Self {
        self.icon = Some(icon.into());
        self
    }

    pub fn with_children(mut self, children: Vec<TreeNode>) -> Self {
        self.children = children;
        self
    }

    pub fn with_expanded(mut self, expanded: bool) -> Self {
        self.expanded = expanded;
        self
    }

    pub fn with_checked(mut self, checked: bool) -> Self {
        self.checked = checked;
        self
    }

    pub fn with_metadata(mut self, metadata: impl Into<String>) -> Self {
        self.metadata = Some(metadata.into());
        self
    }

    /// Find node by ID (recursive)
    pub fn find(&self, id: &str) -> Option<&TreeNode> {
        if self.id == id {
            return Some(self);
        }

        for child in &self.children {
            if let Some(found) = child.find(id) {
                return Some(found);
            }
        }

        None
    }

    /// Find node by ID (mutable)
    pub fn find_mut(&mut self, id: &str) -> Option<&mut TreeNode> {
        if self.id == id {
            return Some(self);
        }

        for child in &mut self.children {
            if let Some(found) = child.find_mut(id) {
                return Some(found);
            }
        }

        None
    }

    /// Get all node IDs (flattened)
    pub fn all_ids(&self) -> Vec<String> {
        let mut ids = vec![self.id.clone()];
        for child in &self.children {
            ids.extend(child.all_ids());
        }
        ids
    }

    /// Get all checked node IDs (recursive)
    pub fn checked_ids(&self) -> Vec<String> {
        let mut ids = Vec::new();
        if self.checked {
            ids.push(self.id.clone());
        }
        for child in &self.children {
            ids.extend(child.checked_ids());
        }
        ids
    }

    /// Check if node has children
    pub fn has_children(&self) -> bool {
        !self.children.is_empty()
    }

    /// Get depth level
    pub fn depth(&self) -> usize {
        if self.children.is_empty() {
            0
        } else {
            1 + self.children.iter().map(|c| c.depth()).max().unwrap_or(0)
        }
    }
}