1use serde::{Deserialize, Serialize};
2use std::collections::HashMap;
3
4pub type NodeId = uuid::Uuid;
5pub type EdgeId = uuid::Uuid;
6pub type Timestamp = chrono::DateTime<chrono::Utc>;
7
8#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
9#[serde(rename_all = "snake_case")]
10pub enum PropertyValue {
11 String(String),
12 Integer(i64),
13 Float(f64),
14 Boolean(bool),
15 Timestamp(Timestamp),
16 List(Vec<PropertyValue>),
17 Map(HashMap<String, PropertyValue>),
18 Null,
19}
20
21pub type Properties = HashMap<String, PropertyValue>;
22
23impl PropertyValue {
24 pub fn as_str(&self) -> Option<&str> {
25 match self {
26 PropertyValue::String(s) => Some(s.as_str()),
27 _ => None,
28 }
29 }
30}
31
32#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
33pub struct Node {
34 pub id: NodeId,
35 pub node_type: String,
36 pub properties: Properties,
37 pub created_at: Timestamp,
38 pub updated_at: Timestamp,
39}
40
41impl Node {
42 pub fn new(node_type: impl Into<String>, properties: Properties) -> Self {
43 let now = chrono::Utc::now();
44 Self {
45 id: NodeId::new_v4(),
46 node_type: node_type.into(),
47 properties,
48 created_at: now,
49 updated_at: now,
50 }
51 }
52
53 pub fn with_id(mut self, id: NodeId) -> Self {
54 self.id = id;
55 self
56 }
57
58 pub fn get_property(&self, key: &str) -> Option<&PropertyValue> {
59 self.properties.get(key)
60 }
61
62 pub fn set_property(&mut self, key: impl Into<String>, value: PropertyValue) {
63 self.properties.insert(key.into(), value);
64 self.updated_at = chrono::Utc::now();
65 }
66}
67
68#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
69pub struct Edge {
70 pub id: EdgeId,
71 pub edge_type: String,
72 pub from_node_id: NodeId,
73 pub to_node_id: NodeId,
74 pub properties: Properties,
75 pub created_at: Timestamp,
76}
77
78impl Edge {
79 pub fn new(
80 edge_type: impl Into<String>,
81 from_node_id: NodeId,
82 to_node_id: NodeId,
83 properties: Properties,
84 ) -> Self {
85 Self {
86 id: EdgeId::new_v4(),
87 edge_type: edge_type.into(),
88 from_node_id,
89 to_node_id,
90 properties,
91 created_at: chrono::Utc::now(),
92 }
93 }
94}
95
96#[derive(Debug, Clone, Serialize, Deserialize)]
97pub struct GraphQuery {
98 pub node_types: Option<Vec<String>>,
99 pub edge_types: Option<Vec<String>>,
100 pub property_filters: Option<HashMap<String, PropertyValue>>,
101 pub limit: Option<usize>,
102}
103
104impl GraphQuery {
105 pub fn new() -> Self {
106 Self {
107 node_types: None,
108 edge_types: None,
109 property_filters: None,
110 limit: None,
111 }
112 }
113
114 pub fn with_node_type(mut self, node_type: impl Into<String>) -> Self {
115 self.node_types = Some(vec![node_type.into()]);
116 self
117 }
118
119 pub fn with_edge_type(mut self, edge_type: impl Into<String>) -> Self {
120 self.edge_types = Some(vec![edge_type.into()]);
121 self
122 }
123
124 pub fn with_filter(mut self, key: impl Into<String>, value: PropertyValue) -> Self {
125 let mut filters = self.property_filters.unwrap_or_default();
126 filters.insert(key.into(), value);
127 self.property_filters = Some(filters);
128 self
129 }
130
131 pub fn with_limit(mut self, limit: usize) -> Self {
132 self.limit = Some(limit);
133 self
134 }
135}
136
137impl Default for GraphQuery {
138 fn default() -> Self {
139 Self::new()
140 }
141}
142
143pub fn string_to_node_id(s: &str) -> NodeId {
146 let namespace = uuid::Uuid::from_bytes([
149 0x6b, 0xa7, 0xb8, 0x10, 0x9d, 0xad, 0x11, 0xd1, 0x80, 0xb4, 0x00, 0xc0, 0x4f, 0xd4, 0x30,
150 0xc8,
151 ]);
152 uuid::Uuid::new_v5(&namespace, s.as_bytes())
153}