mod.rs
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mod.rs
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	use rusqlite::Connection;
	use serde_json::Value;
	use ulid::Ulid;

	pub struct Label {
	pub key: String,
	pub val: Option<String>,
	}

	impl Label {
	pub fn new(key: String, val: Option<String>) -> Self {
	Self { key, val }
	}
	}

	pub struct Edge {
	pub id: usize,
	pub name: String,
	pub data: Option<Value>,
	pub nodes: Vec<Ulid>,
	}

	impl Edge {
	pub fn new(name: &str, sqlite: &Connection) -> Edge {
	let id: usize = sqlite
	.query_row(
	"INSERT into edges (name) values(?1) returning id",
	[name],
	\|row\| row.get(0),
	)
	.unwrap();

	Edge {
	id,
	name: name.into(),
	data: None,
	nodes: vec![],
	}
	}
	}