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use crate::debug_print;
use crate::mysql::def::*;
use crate::mysql::parser::{parse_constraint_query_results, parse_index_query_results};
use crate::mysql::query::{
ColumnQueryResult, ConstraintQueryResult, IndexQueryResult, SchemaQueryBuilder,
TableQueryResult, VersionQueryResult,
};
use futures::future;
use sea_query::{Alias, Iden, IntoIden, SeaRc};
mod executor;
pub use executor::*;
pub struct SchemaDiscovery {
pub query: SchemaQueryBuilder,
pub executor: Executor,
pub schema: SeaRc<dyn Iden>,
}
impl SchemaDiscovery {
pub fn new<E>(executor: E, schema: &str) -> Self
where
E: IntoExecutor,
{
Self {
query: SchemaQueryBuilder::default(),
executor: executor.into_executor(),
schema: Alias::new(schema).into_iden(),
}
}
pub async fn discover(mut self) -> Schema {
self.query = SchemaQueryBuilder::new(self.discover_system().await);
let tables = self.discover_tables().await;
let tables = future::join_all(
tables
.into_iter()
.map(|t| (&self, t))
.map(Self::discover_table_static),
)
.await;
Schema {
schema: self.schema.to_string(),
system: self.query.system,
tables,
}
}
pub async fn discover_system(&mut self) -> SystemInfo {
let rows = self.executor.fetch_all(self.query.query_version()).await;
for row in rows.iter() {
let result: VersionQueryResult = row.into();
debug_print!("{:?}", result);
let version = result.parse();
debug_print!("{:?}", version);
debug_print!();
return version;
}
panic!("failed to discover version")
}
pub async fn discover_tables(&mut self) -> Vec<TableInfo> {
let rows = self
.executor
.fetch_all(self.query.query_tables(self.schema.clone()))
.await;
let tables: Vec<TableInfo> = rows
.iter()
.map(|row| {
let result: TableQueryResult = row.into();
debug_print!("{:?}", result);
let table = result.parse();
debug_print!("{:?}", table);
table
})
.collect();
debug_print!();
tables
}
async fn discover_table_static(params: (&Self, TableInfo)) -> TableDef {
let this = params.0;
let info = params.1;
Self::discover_table(this, info).await
}
pub async fn discover_table(&self, info: TableInfo) -> TableDef {
let table = SeaRc::new(Alias::new(info.name.as_str()));
let columns = self
.discover_columns(self.schema.clone(), table.clone())
.await;
let indexes = self
.discover_indexes(self.schema.clone(), table.clone())
.await;
let foreign_keys = self
.discover_foreign_keys(self.schema.clone(), table.clone())
.await;
TableDef {
info,
columns,
indexes,
foreign_keys,
}
}
pub async fn discover_columns(
&self,
schema: SeaRc<dyn Iden>,
table: SeaRc<dyn Iden>,
) -> Vec<ColumnInfo> {
let rows = self
.executor
.fetch_all(self.query.query_columns(schema.clone(), table.clone()))
.await;
let columns = rows
.iter()
.map(|row| {
let result: ColumnQueryResult = row.into();
debug_print!("{:?}", result);
let column = result.parse();
debug_print!("{:?}", column);
return column;
})
.collect::<Vec<_>>();
debug_print!();
columns
}
pub async fn discover_indexes(
&self,
schema: SeaRc<dyn Iden>,
table: SeaRc<dyn Iden>,
) -> Vec<IndexInfo> {
let rows = self
.executor
.fetch_all(self.query.query_indexes(schema.clone(), table.clone()))
.await;
let results: Vec<IndexQueryResult> = rows
.iter()
.map(|row| {
let result = row.into();
debug_print!("{:?}", result);
return result;
})
.collect();
debug_print!();
let indexes = parse_index_query_results(Box::new(results.into_iter()))
.map(|index| {
debug_print!("{:?}", index);
index
})
.collect::<Vec<_>>();
debug_print!();
indexes
}
pub async fn discover_foreign_keys(
&self,
schema: SeaRc<dyn Iden>,
table: SeaRc<dyn Iden>,
) -> Vec<ForeignKeyInfo> {
let rows = self
.executor
.fetch_all(self.query.query_constraints(schema.clone(), table.clone()))
.await;
let results: Vec<ConstraintQueryResult> = rows
.iter()
.map(|row| {
let result = row.into();
debug_print!("{:?}", result);
return result;
})
.collect();
debug_print!();
let foreign_keys = parse_constraint_query_results(Box::new(results.into_iter()))
.map(|index| {
debug_print!("{:?}", index);
index
})
.collect::<Vec<_>>();
debug_print!();
foreign_keys
}
}