1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
use serde::Deserialize;
use serde_json::{Value, json};
use crate::kvs::store::Datastore;
use crate::prelude::*;
#[derive(Deserialize, Debug)]
pub struct SQL {
pub stmt: String,
pub tb: String,
pub doc: String,
pub data: Value,
pub topic: String,
pub user_id: Option<usize>,
pub message: String,
}
impl Datastore {
/// executes a SQL statement
///
/// # Examples
/// ```
/// use mintdb::Datastore;
/// use serde_json::json;
/// use mintdb::db::exe::SQL;
///
/// #[tokio::main]
/// async fn main() -> Result<(), mintdb::Error> {
/// let db = Datastore::new().await?;
/// let tb = "car";
/// let doc = "car:1";
/// let data = json!({"make": "Mercedes-Benz"});
/// let sql = SQL{
/// stmt: "MERGE".into(),
/// tb: tb.into(),
/// doc: doc.into(),
/// data: data,
/// topic: "".into(),
/// user_id: Some(1),
/// message: "".into(),
/// };
/// db.execute(&sql).await?;
///
/// let sql = SQL{
/// stmt: "SELECT".into(),
/// tb: "car".into(),
/// doc: "*".into(),
/// data: json!({}),
/// topic: "".into(),
/// user_id: Some(1),
/// message: "".into(),
/// };
/// let res = db.execute(&sql).await?;
/// Ok(())
/// }
/// ```
pub async fn execute(&self, sql: &SQL) -> Result<Value> {
match sql.stmt.as_str() {
"INFO" => {
match self.get_tb_keys_auth().await {
Ok(res) => Ok(json!(&res)),
Err(e) => Ok(json!({"error": e.to_string()}))
}
}
"ADD" => {
match self.create_table(&sql.tb).await {
Ok(res) => Ok(json!(&res)),
Err(e) => Ok(json!({"error": e.to_string()}))
}
}
"SELECT" => {
match sql.doc.as_str() {
"*" => {
match self.get_many(&sql.tb).await {
Ok(res) => return Ok(json!(&res)),
Err(e) => return Ok(json!({"error": e.to_string()})),
}
}
_ => {
match self.get_one(&sql.tb, &sql.doc).await {
Ok(res) => return Ok(json!(&res)),
Err(e) => return Ok(json!({"error": e.to_string()})),
}
}
}
}
"MERGE" => self.merge(&sql.tb, &sql.doc, json!(sql.data)).await,
"CREATE" => self.create_document(&sql.tb, &sql.doc, json!(sql.data)).await,
"DELETE" => {
if let Value::String(key) = &sql.data["key"] {
if &sql.doc == "*" {
return self.delete_key_from_table(&sql.tb, key).await;
} else {
return self.delete_key(&sql.tb, &sql.doc, key).await;
}
}
self.delete_document(&sql.tb, &sql.doc).await
}
"FIND" => self.find(&sql.tb, json!(sql.data)).await,
"MATCH" => self.match_all(&sql.tb, json!(sql.data)).await,
"COMPARE" => {
let lhs = match &sql.data["lhs"] {
Value::String(s) => s,
_ => return Err(Error::RequestMissingKey("lhs".into()))
};
let op = match &sql.data["op"] {
Value::String(s) => s,
_ => return Err(Error::RequestMissingKey("op".into()))
};
let rhs = match &sql.data["rhs"] {
Value::Null => return Err(Error::RequestMissingKey("rhs".into())),
val => val,
};
self.compare(&sql.tb, lhs, op, rhs).await
}
"PUSH" => {
let key = match sql.data.get("key") {
Some(k) => match k.as_str() {
Some(t) => t,
None => return Err(Error::RequestMissingKey("key".into()))
}
None => return Err(Error::RequestMissingKey("key".into()))
};
let value = match sql.data.get("value") {
Some(v) => v,
None => return Err(Error::RequestMissingKey("value".into()))
};
self.push(&sql.tb, &sql.doc, key, value.clone()).await
}
"PUT" => {
let key = match sql.data.get("key") {
Some(k) => match k.as_str(){
Some(t) => t,
None => return Err(Error::RequestMissingKey("key".into()))
}
None => return Err(Error::RequestMissingKey("key".into()))
};
let value = match sql.data.get("value") {
Some(v) => v,
None => return Ok(json!({"error": "Missing 'value' field in request body"}))
};
self.put(&sql.tb, &sql.doc, key, value.clone()).await
}
"REL" => {
let ref_tb = match sql.data.get("ref_tb") {
Some(k) => match k.as_str(){
Some(t) => t,
None => return Err(Error::RequestMissingKey("ref_tb".into()))
}
None => return Err(Error::RequestMissingKey("ref_tb".into()))
};
let ref_doc = match sql.data.get("ref_doc") {
Some(k) => match k.as_str(){
Some(t) => t,
None => return Err(Error::RequestMissingKey("ref_doc".into()))
}
None => return Err(Error::RequestMissingKey("ref_doc".into()))
};
let rel = match sql.data.get("rel") {
Some(k) => match k.as_str(){
Some(t) => t,
None => return Err(Error::RequestMissingKey("rel".into()))
}
None => return Err(Error::RequestMissingKey("rel".into()))
};
match self.add_node(&sql.tb, &sql.doc, ref_tb, ref_doc, rel).await {
Ok(_) => {
let res = format!("Relationship {} added from {} to {}", rel, sql.doc, ref_doc);
return Ok(json!({"Ok": res}))
},
Err(e) => Ok(json!({"error": e.to_string()}))
}
}
"DFS" => {
let rel = match &sql.data["rel"] {
Value::String(k) => k.as_str(),
_ => return Err(Error::RequestMissingKey("rel".into()))
};
let target_doc = match &sql.data["target_doc"] {
Value::String(k) => k.as_str(),
_ => return Err(Error::RequestMissingKey("target_doc".into()))
};
let mut visited = vec![];
match self.dfs(&sql.tb, &sql.doc, rel, target_doc, &mut visited) {
Ok(res) => match res {
Some(val) => Ok(json!(val)),
None => Ok(json!({ "error": "Not found" }))
}
Err(e) => Ok(json!({ "error": e.to_string() }))
}
}
"BFS" => {
let rel = match &sql.data["rel"] {
Value::String(k) => k.as_str(),
_ => return Err(Error::RequestMissingKey("rel".into()))
};
let target_doc = match &sql.data["target_doc"] {
Value::String(k) => k.as_str(),
_ => return Err(Error::RequestMissingKey("target_doc".into()))
};
let mut visited = vec![];
match self.bfs(&sql.tb, &sql.doc, rel, target_doc, &mut visited).await {
Ok(res) => match res {
Some(val) => Ok(json!(val)),
None => Ok(json!({ "error": "Not found" }))
}
Err(e) => Ok(json!({ "error": e.to_string() }))
}
}
_ => {
let res = json!({"error": "ERROR: STMT NOT RECOGNIZED"});
Ok(json!(&res))
}
}
}
}