Implement more

src/drivers.rs

@@ -4,16 +4,16 @@
 use std::fmt;
 
 #[cfg(feature = "postgres")]
-mod postgres;
+pub mod postgres;
 
 #[cfg(feature = "sqlite")]
-mod sqlite;
+pub mod sqlite;
 
 #[cfg(feature = "mysql")]
-mod mysql;
+pub mod mysql;
 
 #[cfg(feature = "mssql")]
-mod mssql;
+pub mod mssql;
 
 #[derive(Debug)]
 struct Connection;
@@ -22,12 +22,20 @@ struct Connection;
 #[derive(Debug)]
 struct QueryResult;
 
-struct DriverBase {
-    escape_char_open: char,
-    escape_char_close: char,
-    has_truncate: bool,
+/// Empty Driver implementation
+///
+/// Good for general testing
+#[derive(Debug)]
+pub struct DefaultDriver;
+
+impl DefaultDriver {
+    pub fn new() -> Self {
+        DefaultDriver {}
+    }
 }
 
+impl DatabaseDriver for DefaultDriver {}
+
 /// Database Driver Trait
 ///
 /// Interface between the database connection library and the query builder
@@ -39,7 +47,7 @@ pub trait DatabaseDriver: fmt::Debug {
     }
 
     /// Vector version of `quote_identifier`
-    fn quote_identifiers<'a>(&self, identifiers: Vec<&'a str>) -> Vec<String> {
+    fn quote_identifiers(&self, identifiers: Vec<&str>) -> Vec<String> {
         let mut output: Vec<String> = vec![];
 
         for identifier in identifiers {
@@ -81,7 +89,7 @@ pub trait DatabaseDriver: fmt::Debug {
             if tier.starts_with(open_char) && tier.ends_with(close_char) {
                 trimmed_tiers.push(tier.to_string());
             } else {
-                let mut tier = format!("{}{}{}", open_char, tier, close_char);
+                let tier = format!("{}{}{}", open_char, tier, close_char);
                 trimmed_tiers.push(tier.to_string());
             }
         }
@@ -90,26 +98,17 @@ pub trait DatabaseDriver: fmt::Debug {
         // @TODO Fix functional calls in 'select' queries
     }
 
-    /// Runs a basic sql query on the database
-    fn query(&self, query: &str) -> Result<(), ()>;
+    // Runs a basic sql query on the database
+    // fn query(&self, query: &str) -> Result<(), ()>;
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
 
-    #[derive(Debug)]
-    struct TestDriver;
-
-    impl DatabaseDriver for TestDriver {
-        fn query(&self, _query: &str) -> Result<(), ()> {
-            Ok(())
-        }
-    }
-
     #[test]
     fn test_quote_identifier() {
-        let driver = TestDriver {};
+        let driver = DefaultDriver::new();
 
         assert_eq!(
             driver.quote_identifier("foo, bar, baz"),
@@ -123,7 +122,7 @@ mod tests {
 
     #[test]
     fn test_quote_identifiers() {
-        let driver = TestDriver {};
+        let driver = DefaultDriver::new();
 
         assert_eq!(
             driver.quote_identifiers(vec!["\tfoo. bar", "baz", "fizz.\n\tbuzz.baz",]),

src/drivers/mssql.rs

@@ -3,16 +3,18 @@ use super::*;
 #[derive(Debug)]
 pub struct MSSQL;
 
+impl MSSQL {
+    pub fn new() -> Self {
+        MSSQL {}
+    }
+}
+
 impl DatabaseDriver for MSSQL {
     /// Get which characters are used to delimit identifiers
     /// such as tables, and columns
     fn _quotes(&self) -> (char, char) {
         ('[', ']')
     }
-
-    fn query(&self, _query: &str) -> Result<(), ()> {
-        Ok(())
-    }
 }
 
 #[cfg(test)]
@@ -21,7 +23,7 @@ mod tests {
 
     #[test]
     fn test_quote_identifier_bracket_quote() {
-        let driver = MSSQL {};
+        let driver = MSSQL::new();
 
         assert_eq!(
             driver.quote_identifier("foo, bar, baz"),
@@ -35,7 +37,7 @@ mod tests {
 
     #[test]
     fn test_quote_identifiers_bracket_quote() {
-        let driver = MSSQL {};
+        let driver = MSSQL::new();
 
         assert_eq!(
             driver.quote_identifiers(vec!["\tfoo. bar", "baz", "fizz.\n\tbuzz.baz",]),

src/drivers/mysql.rs

@@ -3,16 +3,18 @@ use super::*;
 #[derive(Debug)]
 pub struct MySQL;
 
+impl MySQL {
+    pub fn new() -> Self {
+        MySQL {}
+    }
+}
+
 impl DatabaseDriver for MySQL {
     /// Get which characters are used to delimit identifiers
     /// such as tables, and columns
     fn _quotes(&self) -> (char, char) {
         ('`', '`')
     }
-
-    fn query(&self, _query: &str) -> Result<(), ()> {
-        Ok(())
-    }
 }
 
 #[cfg(test)]
@@ -21,7 +23,7 @@ mod tests {
 
     #[test]
     fn test_quote_identifier_backtick_quote() {
-        let driver = MySQL {};
+        let driver = MySQL::new();
 
         assert_eq!(
             driver.quote_identifier("foo, bar, baz"),
@@ -35,7 +37,7 @@ mod tests {
 
     #[test]
     fn test_quote_identifiers_backtick_quote() {
-        let driver = MySQL {};
+        let driver = MySQL::new();
 
         assert_eq!(
             driver.quote_identifiers(vec!["\tfoo. bar", "baz", "fizz.\n\tbuzz.baz",]),

src/drivers/postgres.rs

@@ -3,8 +3,10 @@ use super::*;
 #[derive(Debug)]
 pub struct Postgres;
 
-impl DatabaseDriver for Postgres {
-    fn query(&self, _query: &str) -> Result<(), ()> {
-        Ok(())
+impl Postgres {
+    pub fn new() -> Self {
+        Postgres {}
     }
 }
+
+impl DatabaseDriver for Postgres { }

src/drivers/sqlite.rs

@@ -3,12 +3,10 @@ use super::*;
 #[derive(Debug)]
 pub struct SQLite;
 
-impl DatabaseDriver for SQLite {
-    fn quote_identifier(&self, identifier: &str) -> String {
-        String::from(identifier)
-    }
-
-    fn query(&self, _query: &str) -> Result<(), ()> {
-        Ok(())
+impl SQLite {
+    pub fn new() -> Self {
+        SQLite {}
     }
 }
+
+impl DatabaseDriver for SQLite { }

src/main.rs

@@ -1,9 +1,10 @@
 //! This main file is just for temparary testing
 use stringqb::query_builder::QueryBuilder;
 use stringqb::types::{SQLType, Type};
+use stringqb::drivers::postgres::Postgres;
 
 fn main() {
-    let mut qb = QueryBuilder::new();
+    let mut qb = QueryBuilder::new(Postgres::new());
 
     qb.set("foo", Box::new("bar"))
         .set("bar", Box::new(12))

src/query_builder.rs

@@ -4,7 +4,7 @@
 use std::any::Any;
 use std::collections::HashMap;
 
-use crate::drivers::DatabaseDriver;
+use crate::drivers::{ DatabaseDriver, DefaultDriver };
 
 /// The position of the wildcard(s)
 /// for a `like` clause
@@ -35,21 +35,22 @@ pub enum JoinType {
 }
 
 /// The sort direction
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 pub enum OrderDirection {
     /// Sort Ascending
     Asc,
     /// Sort Descending
     Desc,
+    /// Random Sort
+    Rand,
 }
 
 #[derive(Debug)]
 enum QueryClauseType {
-    AndGroupStart,
     GroupEnd,
     GroupStart,
+    Join,
     Like,
-    OrGroupStart,
     Where,
     WhereIn,
 }
@@ -62,11 +63,11 @@ struct QueryClause {
 }
 
 impl QueryClause {
-    pub fn new(clause_type: QueryClauseType, conjunction: String, string: String) -> Self {
+    pub fn new(clause_type: QueryClauseType, conjunction: &str, string: &str) -> Self {
         QueryClause {
             clause_type,
-            conjunction,
-            string,
+            conjunction: conjunction.to_string(),
+            string: string.to_string(),
         }
     }
 }
@@ -86,7 +87,7 @@ struct QueryState {
     order_array: HashMap<String, String>,
 
     // Group by clause
-    group_array: HashMap<String, String>,
+    group_array: Vec<String>,
 
     // Values to apply to prepared statements
     values: Vec<Box<dyn Any>>,
@@ -116,7 +117,7 @@ impl Default for QueryState {
 
             set_array_keys: vec![],
             order_array: HashMap::new(),
-            group_array: HashMap::new(),
+            group_array: vec![],
             values: vec![],
             where_values: vec![],
 
@@ -133,21 +134,43 @@ impl QueryState {
     pub fn new() -> Self {
         QueryState::default()
     }
+
+    pub fn append_select_string(&mut self, s:&str) -> &mut Self {
+        self.select_string += s;
+
+        self
+    }
+
+    pub fn set_from_string(&mut self, s:&str) -> &mut Self {
+        self.from_string = s.to_owned();
+
+        self
+    }
 }
 
 /// The struct representing a query builder
-#[derive(Default, Debug)]
+#[derive(Debug)]
 pub struct QueryBuilder {
     state: QueryState,
-    driver: Option<Box<dyn DatabaseDriver>>,
+    driver: Box<dyn DatabaseDriver>,
+}
+
+impl Default for QueryBuilder {
+    /// Creates a new QueryBuilder instance with default driver
+    fn default() -> Self {
+        QueryBuilder {
+            state: QueryState::new(),
+            driver: Box::new(DefaultDriver::new()),
+        }
+    }
 }
 
 impl QueryBuilder {
-    /// Creates a new QueryBuilder instance
-    pub fn new() -> Self {
+    /// Create a new QueryBuilder instance with a driver
+    pub fn new(driver: impl DatabaseDriver + 'static) -> Self {
         QueryBuilder {
             state: QueryState::new(),
-            driver: None,
+            driver: Box::new(driver),
         }
     }
 
@@ -296,19 +319,82 @@ impl QueryBuilder {
         self
     }
 
+    /// Convenience method for a `left` join
+    pub fn left_join(&mut self, table: &str, col: &str, op: &str, value: &str) -> &mut Self {
+        self.join(table, col, op, value, JoinType::Left)
+    }
+
+    /// Convenience method for an `inner` join
+    pub fn inner_join(&mut self, table: &str, col: &str, op: &str, value: &str) -> &mut Self {
+        self.join(table, col, op, value, JoinType::Inner)
+    }
+
     /// Add a table join to the query
-    pub fn join(&mut self, table: &str, condition: &str, join_type: JoinType) -> &mut Self {
-        unimplemented!();
+    pub fn join(&mut self, table: &str, col: &str, op: &str, value: &str, join_type: JoinType) -> &mut Self {
+        let table = self.driver.quote_identifier(table);
+        let col = self.driver.quote_identifier(col);
+        let condition = table + " ON " + &col + op + value;
+
+        let join_type = match join_type {
+            JoinType::Left => "LEFT ",
+            JoinType::Inner => "INNER ",
+            JoinType::LeftOuter => "LEFT OUTER ",
+            JoinType::Outer => "OUTER ",
+            JoinType::Right => "RIGHT ",
+            JoinType::RightOuter => "RIGHT OUTER",
+        };
+
+        let conjunction = "\n".to_string() + join_type + "JOIN ";
+
+        self.state.query_map.push(QueryClause::new(
+            QueryClauseType::Join,
+            &conjunction,
+            &condition
+        ));
+
+        self
     }
 
     /// Add a group by clause to the query
     pub fn group_by(&mut self, field: &str) -> &mut Self {
-        unimplemented!();
+        self.state.group_array.push(field.to_string());
+
+        self.state.group_string = " GROUP BY ".to_string() + &self.state.group_array.join(",");
+
+        self
     }
 
     /// Add an order by clause to the query
     pub fn order_by(&mut self, field: &str, direction: OrderDirection) -> &mut Self {
-        unimplemented!();
+        if direction == OrderDirection::Rand {
+            // @TODO handle random sorting
+            unimplemented!();
+        }
+
+        let field = self.driver.quote_identifier(field);
+        let dir = match direction {
+            OrderDirection::Asc => String::from("ASC"),
+            OrderDirection::Desc => String::from("DESC"),
+            OrderDirection::Rand => String::from("RAND"),
+        };
+        self.state.order_array.insert(field, dir);
+
+        let mut order_clauses: Vec<String> = vec![];
+
+        for (f, dir) in &self.state.order_array {
+            let clause = String::clone(f) + " " + &dir;
+            &order_clauses.push(clause);
+        }
+
+        let order_str = if direction != OrderDirection::Rand {
+            "\nORDER BY ".to_string() + &order_clauses.join(", ")
+        } else {
+            unimplemented!();
+        };
+
+        self.state.order_string = order_str;
+
+        self
     }
 
     /// Add a limit to the query
@@ -331,27 +417,73 @@ impl QueryBuilder {
 
     /// Start a logical grouping in the current query
     pub fn group_start(&mut self) -> &mut Self {
-        unimplemented!();
+        if self.state.query_map.len() == 0 {
+            self.state.query_map.push(QueryClause::new(
+                QueryClauseType::GroupStart,
+                " ",
+                "("
+            ));
+        } else {
+            self.state.query_map.push(QueryClause::new(
+                QueryClauseType::GroupStart,
+                " WHERE ",
+                "("
+            ));
+        }
+
+        self
     }
 
     /// Start a logical grouping, prefixed with `not`
     pub fn not_group_start(&mut self) -> &mut Self {
-        unimplemented!();
+        if self.state.query_map.len() == 0 {
+            self.state.query_map.push(QueryClause::new(
+                QueryClauseType::GroupStart,
+                " WHERE ",
+                "("
+            ));
+        } else {
+            self.state.query_map.push(QueryClause::new(
+                QueryClauseType::GroupStart,
+                " AND ",
+                "("
+            ));
+        }
+
+        self
     }
 
     /// Start a logical grouping, prefixed with `or`
     pub fn or_group_start(&mut self) -> &mut Self {
-        unimplemented!();
+        self.state.query_map.push(QueryClause::new(
+            QueryClauseType::GroupStart,
+            "",
+            " OR ("
+        ));
+
+        self
     }
 
     /// Start a logical grouping, prefixed with `or not`
     pub fn or_not_group_start(&mut self) -> &mut Self {
-        unimplemented!();
+        self.state.query_map.push(QueryClause::new(
+            QueryClauseType::GroupStart,
+            "",
+            " OR NOT ("
+        ));
+
+        self
     }
 
     /// End the current logical grouping
     pub fn group_end(&mut self) -> &mut Self {
-        unimplemented!();
+        self.state.query_map.push(QueryClause::new(
+            QueryClauseType::GroupEnd,
+            "",
+            ")"
+        ));
+
+        self
     }
 
     // --------------------------------------------------------------------------
@@ -414,8 +546,10 @@ impl QueryBuilder {
     // --------------------------------------------------------------------------
 
     /// Get a new instance of the query builder
-    pub fn reset_query(&mut self) -> Self {
-        QueryBuilder::new()
+    pub fn reset_query(mut self) -> Self {
+        self.state = QueryState::new();
+
+        self
     }
 }
 
@@ -425,7 +559,7 @@ mod tests {
 
     #[test]
     fn set_key_value() {
-        let mut qb = QueryBuilder::new();
+        let mut qb = QueryBuilder::default();
 
         qb.set("foo", Box::new("bar"));
 
@@ -438,7 +572,7 @@ mod tests {
 
     #[test]
     fn set_hashmap() {
-        let mut qb = QueryBuilder::new();
+        let mut qb = QueryBuilder::default();
 
         let mut authors: HashMap<String, Box<dyn Any>> = HashMap::new();
         authors.insert(