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use crate::error::Error;
use crate::postgres::query_table::{QueryTables, QueryTable};
use crate::postgres::query_field::{QueryWithParams, ParameterValueAsRef};
use crate::postgres::query_token::{QueryTokens, QueryToken, FormatQueryTup};
use crate::postgres::query_where::{QueryWheres, WhereOperator};
use crate::postgres::query_set::{QuerySets};
use crate::postgres::query_return::{QueryReturns, QueryReturnField};
#[derive(Default, Debug)]
pub struct SqlUpdate<'a> {
_tables: QueryTables,
_sets: QuerySets,
_wheres: QueryWheres,
_returns: QueryReturns,
_parameters: Vec<ParameterValueAsRef<'a>>,
}
impl<'a> SqlUpdate<'a> {
pub fn new() -> SqlUpdate<'static> {
SqlUpdate::default()
}
pub fn build(&self) -> Result<QueryWithParams, Error> {
let mut param_iter = 1;
let built_for_table = self._tables.build(&mut param_iter)?;
let built_for_update = self._sets.build_for_update(&mut param_iter)?;
let mut vec: Vec<String> = Vec::new();
let mut p: Vec<ParameterValueAsRef> = Vec::new();
for ploc in built_for_table.parameters_loc {
p.push(self._parameters[ploc]);
}
for ploc in built_for_update.parameters_loc {
p.push(self._parameters[ploc]);
}
vec.push(format!("UPDATE {} SET {}", built_for_table.query, built_for_update.query));
if self._wheres.len() > 0 {
let built_for_where = self._wheres.build(&mut param_iter)?;
vec.push(format!("WHERE {}", built_for_where.query));
for ploc in built_for_where.parameters_loc {
p.push(self._parameters[ploc]);
}
}
if self._returns.len() > 0 {
let built_for_return: String = self._returns.build()?;
vec.push(format!("RETURNING {}", built_for_return));
}
Ok(QueryWithParams {
query: vec.join(" "),
parameters: p,
})
}
pub fn table<S: Into<QueryTable>>(&mut self, table: S) -> &mut Self {
self._tables.push(table.into());
self
}
pub fn set<S: Into<String>, T>(&mut self, field: S, param: &'a T) -> &mut Self where T: postgres::types::ToSql + 'a {
self._parameters.push(param);
self._sets.set((field.into(), QueryTokens(vec![QueryToken::ParameterLoc(self._parameters.len() - 1)])));
self
}
pub fn set_raw<S: Into<String>>(&mut self, field: S, tup: FormatQueryTup<'a>) -> &mut Self{
let len = self._parameters.len();
self._parameters.extend(tup.1);
let qtokens = (tup.0).to_query_tokens(len);
self._sets.set((field.into(), qtokens));
self
}
pub fn returning<S: Into<QueryReturnField>>(&mut self, field: S) -> &mut Self {
self._returns.push(field.into());
self
}
pub fn and_where(&mut self, ftup: FormatQueryTup<'a>) -> &mut Self {
if self._wheres.len() > 0 {
self._wheres.push(WhereOperator::And);
}
let len = self._parameters.len();
self._parameters.extend(ftup.1);
let qtokens = (ftup.0).to_query_tokens(len);
self._wheres.extend(qtokens.into());
self
}
pub fn or_where(&mut self, ftup: FormatQueryTup<'a>) -> &mut Self {
if self._wheres.len() > 0 {
self._wheres.push(WhereOperator::Or);
}
let len = self._parameters.len();
self._parameters.extend(ftup.1);
let qtokens = (ftup.0).to_query_tokens(len);
self._wheres.extend(qtokens.into());
self
}
pub fn and_where_open(&mut self) -> &mut Self {
if self._wheres.len() > 0 {
self._wheres.push(WhereOperator::And);
}
self._wheres.push(WhereOperator::Open);
self
}
pub fn or_where_open(&mut self) -> &mut Self {
if self._wheres.len() > 0 {
self._wheres.push(WhereOperator::Or);
}
self._wheres.push(WhereOperator::Open);
self
}
pub fn where_close(&mut self) -> &mut Self {
self._wheres.push(WhereOperator::Close);
self
}
pub fn inner_join<S: Into<QueryTable>>(&mut self, query_table: S, ftup: FormatQueryTup<'a>) -> &mut Self {
let len = self._parameters.len();
self._parameters.extend(ftup.1);
let qtokens = (ftup.0).to_query_tokens(len);
self._tables.inner_join(query_table.into());
self._tables.on(qtokens.into());
self
}
pub fn left_join<S: Into<QueryTable>>(&mut self, query_table: S, ftup: FormatQueryTup<'a>) -> &mut Self {
let len = self._parameters.len();
self._parameters.extend(ftup.1);
let qtokens = (ftup.0).to_query_tokens(len);
self._tables.left_join(query_table.into());
self._tables.on(qtokens.into());
self
}
pub fn right_join<S: Into<QueryTable>>(&mut self, query_table: S, ftup: FormatQueryTup<'a>) -> &mut Self {
let len = self._parameters.len();
self._parameters.extend(ftup.1);
let qtokens = (ftup.0).to_query_tokens(len);
self._tables.right_join(query_table.into());
self._tables.on(qtokens.into());
self
}
pub fn full_join<S: Into<QueryTable>>(&mut self, query_table: S, ftup: FormatQueryTup<'a>) -> &mut Self {
let len = self._parameters.len();
self._parameters.extend(ftup.1);
let qtokens = (ftup.0).to_query_tokens(len);
self._tables.full_join(query_table.into());
self._tables.on(qtokens.into());
self
}
}
#[cfg(test)]
mod tests {
use crate::postgres::query_token::{format_query};
use super::*;
#[test]
fn test_update_builder_1() {
let mut sqlupdate = SqlUpdate::new();
let qbuild = sqlupdate
.table("user")
.set("age", &1337)
.set_raw("name", format_query("LOWER({})".to_owned(), vec![&("foo")]))
.and_where(format_query("id = {}".to_owned(), vec![&(1)]))
.build().unwrap();
assert_eq!(qbuild.query, "UPDATE \"user\" SET \"age\"=$1,\"name\"=LOWER($2) WHERE id = $3");
assert_eq!(format!("{:?}", qbuild.parameters), "[1337, \"foo\", 1]");
}
}