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192 lines
5.8 KiB
Rust
192 lines
5.8 KiB
Rust
use async_trait::async_trait;
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use chrono::NaiveDate;
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use database_tree::{Database, Table};
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use futures::TryStreamExt;
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use sqlx::mysql::{MySqlColumn, MySqlPool as MPool, MySqlRow};
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use sqlx::{Column as _, Row, TypeInfo};
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pub const RECORDS_LIMIT_PER_PAGE: u8 = 200;
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#[async_trait]
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pub trait Pool {
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async fn get_databases(&self) -> anyhow::Result<Vec<Database>>;
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async fn get_tables(&self, database: String) -> anyhow::Result<Vec<Table>>;
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async fn get_records(
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&self,
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database: &String,
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table: &String,
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page: u16,
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filter: Option<String>,
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) -> anyhow::Result<(Vec<String>, Vec<Vec<String>>)>;
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async fn get_columns(
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&self,
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database: &String,
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table: &String,
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) -> anyhow::Result<(Vec<String>, Vec<Vec<String>>)>;
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async fn close(&self);
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}
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pub struct MySqlPool {
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pool: MPool,
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}
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impl MySqlPool {
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pub async fn new(database_url: &str) -> anyhow::Result<Self> {
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Ok(Self {
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pool: MPool::connect(database_url).await?,
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})
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}
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}
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#[async_trait]
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impl Pool for MySqlPool {
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async fn get_databases(&self) -> anyhow::Result<Vec<Database>> {
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let databases = sqlx::query("SHOW DATABASES")
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.fetch_all(&self.pool)
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.await?
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.iter()
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.map(|table| table.get(0))
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.collect::<Vec<String>>();
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let mut list = vec![];
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for db in databases {
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list.push(Database::new(
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db.clone(),
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get_tables(db.clone(), &self.pool).await?,
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))
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}
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Ok(list)
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}
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async fn get_tables(&self, database: String) -> anyhow::Result<Vec<Table>> {
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let tables =
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sqlx::query_as::<_, Table>(format!("SHOW TABLE STATUS FROM `{}`", database).as_str())
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.fetch_all(&self.pool)
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.await?;
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Ok(tables)
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}
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async fn get_records(
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&self,
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database: &String,
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table: &String,
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page: u16,
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filter: Option<String>,
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) -> anyhow::Result<(Vec<String>, Vec<Vec<String>>)> {
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let query = if let Some(filter) = filter {
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format!(
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"SELECT * FROM `{database}`.`{table}` WHERE {filter} LIMIT {page}, {limit}",
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database = database,
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table = table,
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filter = filter,
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page = page,
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limit = RECORDS_LIMIT_PER_PAGE
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)
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} else {
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format!(
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"SELECT * FROM `{}`.`{}` limit {page}, {limit}",
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database,
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table,
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page = page,
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limit = RECORDS_LIMIT_PER_PAGE
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)
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};
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let mut rows = sqlx::query(query.as_str()).fetch(&self.pool);
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let mut headers = vec![];
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let mut records = vec![];
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while let Some(row) = rows.try_next().await? {
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headers = row
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.columns()
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.iter()
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.map(|column| column.name().to_string())
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.collect();
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records.push(
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row.columns()
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.iter()
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.map(|col| convert_column_value_to_string(&row, col))
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.collect::<Vec<String>>(),
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)
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}
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Ok((headers, records))
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}
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async fn get_columns(
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&self,
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database: &String,
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table: &String,
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) -> anyhow::Result<(Vec<String>, Vec<Vec<String>>)> {
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let query = format!("SHOW FULL COLUMNS FROM `{}`.`{}`", database, table);
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let mut rows = sqlx::query(query.as_str()).fetch(&self.pool);
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let mut headers = vec![];
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let mut records = vec![];
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while let Some(row) = rows.try_next().await? {
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headers = row
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.columns()
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.iter()
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.map(|column| column.name().to_string())
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.collect();
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records.push(
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row.columns()
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.iter()
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.map(|col| convert_column_value_to_string(&row, col))
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.collect::<Vec<String>>(),
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)
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}
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Ok((headers, records))
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}
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async fn close(&self) {
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self.pool.close().await;
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}
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}
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pub async fn get_tables(database: String, pool: &MPool) -> anyhow::Result<Vec<Table>> {
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let tables =
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sqlx::query_as::<_, Table>(format!("SHOW TABLE STATUS FROM `{}`", database).as_str())
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.fetch_all(pool)
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.await?;
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Ok(tables)
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}
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pub fn convert_column_value_to_string(row: &MySqlRow, column: &MySqlColumn) -> String {
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let column_name = column.name();
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match column.type_info().clone().name() {
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"INT" | "DECIMAL" | "SMALLINT" => match row.try_get(column_name) {
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Ok(value) => {
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let value: i64 = value;
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value.to_string()
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}
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Err(_) => "".to_string(),
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},
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"INT UNSIGNED" => match row.try_get(column_name) {
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Ok(value) => {
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let value: u64 = value;
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value.to_string()
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}
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Err(_) => "".to_string(),
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},
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"VARCHAR" | "CHAR" | "ENUM" => row.try_get(column_name).unwrap_or_else(|_| "".to_string()),
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"DATE" => match row.try_get(column_name) {
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Ok(value) => {
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let value: NaiveDate = value;
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value.to_string()
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}
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Err(_) => "".to_string(),
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},
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"TIMESTAMP" => match row.try_get(column_name) {
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Ok(value) => {
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let value: chrono::DateTime<chrono::Utc> = value;
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value.to_string()
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}
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Err(_) => "".to_string(),
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},
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"BOOLEAN" => match row.try_get(column_name) {
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Ok(value) => {
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let value: bool = value;
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value.to_string()
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}
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Err(_) => "".to_string(),
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},
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_ => "".to_string(),
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}
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}
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