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
use std::collections::HashMap;
use versatile_data::{
IdxSized
,FieldData
,Activity
};
use super::Database;
mod operation;
pub use operation::{
Record
,SessionOperation
,Depends
,Pend
};
mod sequence_number;
use sequence_number::SequenceNumber;
mod relation;
use relation::SessionRelation;
mod update;
use update::*;
mod search;
use search::SessionSearch;
#[derive(Debug)]
struct TemporaryDataEntity{
activity:Activity
,term_begin:i64
,term_end:i64
,fields:HashMap<String,Vec<u8>>
}
type TemporaryData=HashMap<i32,HashMap<u32,TemporaryDataEntity>>;
struct SessionData{
sequence_number:SequenceNumber
,sequence:IdxSized<usize>
,collection_id:IdxSized<i32>
,collection_row:IdxSized<u32>
,operation:IdxSized<SessionOperation>
,activity: IdxSized<u8>
,term_begin: IdxSized<i64>
,term_end: IdxSized<i64>
,fields:HashMap<String,FieldData>
,relation:SessionRelation
}
pub struct Session<'a>{
main_database:&'a mut Database
,session_dir:String
,session_data:Option<SessionData>
,temporary_data:TemporaryData
}
impl<'a> Session<'a>{
pub fn new(
main_database:&'a mut Database
,session_name:&'a str
)->Result<Session,std::io::Error>{
let session_dir=main_database.root_dir().to_string()+"/sessions/"+session_name;
if !std::path::Path::new(&session_dir).exists(){
std::fs::create_dir_all(&session_dir).unwrap();
}
let session_data=Self::new_data(&session_dir)?;
let mut temporary_data=HashMap::new();
for i in session_data.sequence.triee().iter(){
let row=i.row();
let collection_id=session_data.collection_id.value(row).unwrap();
if collection_id>0{
let col=temporary_data.entry(collection_id).or_insert(HashMap::new());
let collection_row=session_data.collection_row.value(row).unwrap();
let mut fields=HashMap::new();
for (key,val) in &session_data.fields{
if let Some(v)=val.get(collection_row){
fields.insert(key.to_string(), v.to_vec());
}
}
col.insert(collection_row,TemporaryDataEntity{
activity:if session_data.activity.value(row).unwrap()==1{
Activity::Active
}else{
Activity::Inactive
}
,term_begin:session_data.term_begin.value(row).unwrap()
,term_end:session_data.term_end.value(row).unwrap()
,fields
});
}
}
Ok(Session{
main_database
,session_dir:session_dir.to_string()
,session_data:Some(session_data)
,temporary_data
})
}
fn new_data(session_dir:&str)->Result<SessionData,std::io::Error>{
let mut fields=HashMap::new();
let fields_dir=session_dir.to_string()+"/fields/";
if !std::path::Path::new(&fields_dir).exists(){
std::fs::create_dir_all(fields_dir.to_owned()).unwrap();
}
let d=std::fs::read_dir(fields_dir).unwrap();
for p in d{
if let Ok(p)=p{
let path=p.path();
if path.is_dir(){
if let Some(fname)=path.file_name(){
if let Some(str_fname)=fname.to_str(){
if let Some(p)=path.to_str(){
let field=FieldData::new(&(p.to_string()+"/")).unwrap();
fields.insert(String::from(str_fname),field);
}
}
}
}
}
}
Ok(SessionData{
sequence_number:SequenceNumber::new(&(session_dir.to_string()+"/sequece_number.i"))?
,sequence:IdxSized::new(&(session_dir.to_string()+"/sequence.i"))?
,collection_id:IdxSized::new(&(session_dir.to_string()+"/collection_id.i"))?
,collection_row:IdxSized::new(&(session_dir.to_string()+"/collection_row.i"))?
,operation:IdxSized::new(&(session_dir.to_string()+"/operation.i"))?
,activity:IdxSized::new(&(session_dir.to_string()+"/activity.i"))?
,term_begin:IdxSized::new(&(session_dir.to_string()+"/term_begin.i"))?
,term_end:IdxSized::new(&(session_dir.to_string()+"/term_end.i"))?
,fields
,relation:SessionRelation::new(&session_dir)
})
}
pub fn clear(&mut self){
self.session_data=None;
if std::path::Path::new(&self.session_dir).exists(){
std::fs::remove_dir_all(&self.session_dir).unwrap();
}
}
pub fn commit(&mut self){
if let Some(ref mut data)=self.session_data{
commit(data,self.main_database);
self.clear();
}
}
pub fn update(&mut self,records:Vec::<Record>){
match self.session_data{
Some(ref mut data)=>{
let sequence=data.sequence_number.next();
update_recursive(&self.main_database,data,&mut self.temporary_data,&self.session_dir,sequence,&records,None);
}
,None=>{
if let Ok(data)=Self::new_data(&self.session_dir){
self.session_data=Some(data);
if let Some(ref mut data)=self.session_data{
let sequence=data.sequence_number.next();
update_recursive(&self.main_database,data,&mut self.temporary_data,&self.session_dir,sequence,&records,None);
}
}
}
}
}
pub fn begin_search(&self,collection_id:i32)->SessionSearch{
SessionSearch::new(self,collection_id)
}
pub fn field_str(&self,collection_id:i32,row:u32,key:&str)->&str{
if let Some(tmp_col)=self.temporary_data.get(&collection_id){
if let Some(tmp_row)=tmp_col.get(&row){
if let Some(val)=tmp_row.fields.get(key){
if let Ok(str)=std::str::from_utf8(val){
return str;
}
}
}
}
if let Some(col)=self.main_database.collection(collection_id){
col.field_str(row,key)
}else{
""
}
}
pub fn collection_id(&mut self,collection_name:&str)->Result<i32,std::io::Error>{
self.main_database.collection_id(collection_name)
}
}
