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#![allow(non_camel_case_types)]
use std::ffi::CStr;
use std::io::{Read, Write};
use std::marker::PhantomData;
use std::os::raw::{c_char, c_int, c_uchar, c_void};
use std::panic::{catch_unwind, RefUnwindSafe};
use std::ptr;
use std::slice::{from_raw_parts, from_raw_parts_mut};
use fallible_streaming_iterator::FallibleStreamingIterator;
use crate::error::{check, error_from_sqlite_code};
use crate::ffi;
use crate::hooks::Action;
use crate::types::ValueRef;
use crate::{errmsg_to_string, str_to_cstring, Connection, DatabaseName, Result};
type Filter = Option<Box<dyn Fn(&str) -> bool>>;
/// An instance of this object is a session that can be
/// used to record changes to a database.
pub struct Session<'conn> {
phantom: PhantomData<&'conn Connection>,
s: *mut ffi::sqlite3_session,
filter: Filter,
}
impl Session<'_> {
/// Create a new session object
#[inline]
pub fn new(db: &Connection) -> Result<Session<'_>> {
Session::new_with_name(db, DatabaseName::Main)
}
/// Create a new session object
#[inline]
pub fn new_with_name<'conn>(
db: &'conn Connection,
name: DatabaseName<'_>,
) -> Result<Session<'conn>> {
let name = name.as_cstring()?;
let db = db.db.borrow_mut().db;
let mut s: *mut ffi::sqlite3_session = ptr::null_mut();
check(unsafe { ffi::sqlite3session_create(db, name.as_ptr(), &mut s) })?;
Ok(Session {
phantom: PhantomData,
s,
filter: None,
})
}
/// Set a table filter
pub fn table_filter<F>(&mut self, filter: Option<F>)
where
F: Fn(&str) -> bool + Send + RefUnwindSafe + 'static,
{
unsafe extern "C" fn call_boxed_closure<F>(
p_arg: *mut c_void,
tbl_str: *const c_char,
) -> c_int
where
F: Fn(&str) -> bool + RefUnwindSafe,
{
use std::str;
let boxed_filter: *mut F = p_arg as *mut F;
let tbl_name = {
let c_slice = CStr::from_ptr(tbl_str).to_bytes();
str::from_utf8(c_slice)
};
c_int::from(
catch_unwind(|| (*boxed_filter)(tbl_name.expect("non-utf8 table name")))
.unwrap_or_default(),
)
}
match filter {
Some(filter) => {
let boxed_filter = Box::new(filter);
unsafe {
ffi::sqlite3session_table_filter(
self.s,
Some(call_boxed_closure::<F>),
&*boxed_filter as *const F as *mut _,
);
}
self.filter = Some(boxed_filter);
}
_ => {
unsafe { ffi::sqlite3session_table_filter(self.s, None, ptr::null_mut()) }
self.filter = None;
}
};
}
/// Attach a table. `None` means all tables.
pub fn attach(&mut self, table: Option<&str>) -> Result<()> {
let table = if let Some(table) = table {
Some(str_to_cstring(table)?)
} else {
None
};
let table = table.as_ref().map(|s| s.as_ptr()).unwrap_or(ptr::null());
check(unsafe { ffi::sqlite3session_attach(self.s, table) })
}
/// Generate a Changeset
pub fn changeset(&mut self) -> Result<Changeset> {
let mut n = 0;
let mut cs: *mut c_void = ptr::null_mut();
check(unsafe { ffi::sqlite3session_changeset(self.s, &mut n, &mut cs) })?;
Ok(Changeset { cs, n })
}
/// Write the set of changes represented by this session to `output`.
#[inline]
pub fn changeset_strm(&mut self, output: &mut dyn Write) -> Result<()> {
let output_ref = &output;
check(unsafe {
ffi::sqlite3session_changeset_strm(
self.s,
Some(x_output),
output_ref as *const &mut dyn Write as *mut c_void,
)
})
}
/// Generate a Patchset
#[inline]
pub fn patchset(&mut self) -> Result<Changeset> {
let mut n = 0;
let mut ps: *mut c_void = ptr::null_mut();
check(unsafe { ffi::sqlite3session_patchset(self.s, &mut n, &mut ps) })?;
// TODO Validate: same struct
Ok(Changeset { cs: ps, n })
}
/// Write the set of patches represented by this session to `output`.
#[inline]
pub fn patchset_strm(&mut self, output: &mut dyn Write) -> Result<()> {
let output_ref = &output;
check(unsafe {
ffi::sqlite3session_patchset_strm(
self.s,
Some(x_output),
output_ref as *const &mut dyn Write as *mut c_void,
)
})
}
/// Load the difference between tables.
pub fn diff(&mut self, from: DatabaseName<'_>, table: &str) -> Result<()> {
let from = from.as_cstring()?;
let table = str_to_cstring(table)?;
let table = table.as_ptr();
unsafe {
let mut errmsg = ptr::null_mut();
let r =
ffi::sqlite3session_diff(self.s, from.as_ptr(), table, &mut errmsg as *mut *mut _);
if r != ffi::SQLITE_OK {
let errmsg: *mut c_char = errmsg;
let message = errmsg_to_string(&*errmsg);
ffi::sqlite3_free(errmsg as *mut c_void);
return Err(error_from_sqlite_code(r, Some(message)));
}
}
Ok(())
}
/// Test if a changeset has recorded any changes
#[inline]
pub fn is_empty(&self) -> bool {
unsafe { ffi::sqlite3session_isempty(self.s) != 0 }
}
/// Query the current state of the session
#[inline]
pub fn is_enabled(&self) -> bool {
unsafe { ffi::sqlite3session_enable(self.s, -1) != 0 }
}
/// Enable or disable the recording of changes
#[inline]
pub fn set_enabled(&mut self, enabled: bool) {
unsafe {
ffi::sqlite3session_enable(self.s, c_int::from(enabled));
}
}
/// Query the current state of the indirect flag
#[inline]
pub fn is_indirect(&self) -> bool {
unsafe { ffi::sqlite3session_indirect(self.s, -1) != 0 }
}
/// Set or clear the indirect change flag
#[inline]
pub fn set_indirect(&mut self, indirect: bool) {
unsafe {
ffi::sqlite3session_indirect(self.s, c_int::from(indirect));
}
}
}
impl Drop for Session<'_> {
#[inline]
fn drop(&mut self) {
if self.filter.is_some() {
self.table_filter(None::<fn(&str) -> bool>);
}
unsafe { ffi::sqlite3session_delete(self.s) };
}
}
/// Invert a changeset
#[inline]
pub fn invert_strm(input: &mut dyn Read, output: &mut dyn Write) -> Result<()> {
let input_ref = &input;
let output_ref = &output;
check(unsafe {
ffi::sqlite3changeset_invert_strm(
Some(x_input),
input_ref as *const &mut dyn Read as *mut c_void,
Some(x_output),
output_ref as *const &mut dyn Write as *mut c_void,
)
})
}
/// Combine two changesets
#[inline]
pub fn concat_strm(
input_a: &mut dyn Read,
input_b: &mut dyn Read,
output: &mut dyn Write,
) -> Result<()> {
let input_a_ref = &input_a;
let input_b_ref = &input_b;
let output_ref = &output;
check(unsafe {
ffi::sqlite3changeset_concat_strm(
Some(x_input),
input_a_ref as *const &mut dyn Read as *mut c_void,
Some(x_input),
input_b_ref as *const &mut dyn Read as *mut c_void,
Some(x_output),
output_ref as *const &mut dyn Write as *mut c_void,
)
})
}
/// Changeset or Patchset
pub struct Changeset {
cs: *mut c_void,
n: c_int,
}
impl Changeset {
/// Invert a changeset
#[inline]
pub fn invert(&self) -> Result<Changeset> {
let mut n = 0;
let mut cs = ptr::null_mut();
check(unsafe {
ffi::sqlite3changeset_invert(self.n, self.cs, &mut n, &mut cs as *mut *mut _)
})?;
Ok(Changeset { cs, n })
}
/// Create an iterator to traverse a changeset
#[inline]
pub fn iter(&self) -> Result<ChangesetIter<'_>> {
let mut it = ptr::null_mut();
check(unsafe { ffi::sqlite3changeset_start(&mut it as *mut *mut _, self.n, self.cs) })?;
Ok(ChangesetIter {
phantom: PhantomData,
it,
item: None,
})
}
/// Concatenate two changeset objects
#[inline]
pub fn concat(a: &Changeset, b: &Changeset) -> Result<Changeset> {
let mut n = 0;
let mut cs = ptr::null_mut();
check(unsafe {
ffi::sqlite3changeset_concat(a.n, a.cs, b.n, b.cs, &mut n, &mut cs as *mut *mut _)
})?;
Ok(Changeset { cs, n })
}
}
impl Drop for Changeset {
#[inline]
fn drop(&mut self) {
unsafe {
ffi::sqlite3_free(self.cs);
}
}
}
/// Cursor for iterating over the elements of a changeset
/// or patchset.
pub struct ChangesetIter<'changeset> {
phantom: PhantomData<&'changeset Changeset>,
it: *mut ffi::sqlite3_changeset_iter,
item: Option<ChangesetItem>,
}
impl ChangesetIter<'_> {
/// Create an iterator on `input`
#[inline]
pub fn start_strm<'input>(input: &&'input mut dyn Read) -> Result<ChangesetIter<'input>> {
let mut it = ptr::null_mut();
check(unsafe {
ffi::sqlite3changeset_start_strm(
&mut it as *mut *mut _,
Some(x_input),
input as *const &mut dyn Read as *mut c_void,
)
})?;
Ok(ChangesetIter {
phantom: PhantomData,
it,
item: None,
})
}
}
impl FallibleStreamingIterator for ChangesetIter<'_> {
type Error = crate::error::Error;
type Item = ChangesetItem;
#[inline]
fn advance(&mut self) -> Result<()> {
let rc = unsafe { ffi::sqlite3changeset_next(self.it) };
match rc {
ffi::SQLITE_ROW => {
self.item = Some(ChangesetItem { it: self.it });
Ok(())
}
ffi::SQLITE_DONE => {
self.item = None;
Ok(())
}
code => Err(error_from_sqlite_code(code, None)),
}
}
#[inline]
fn get(&self) -> Option<&ChangesetItem> {
self.item.as_ref()
}
}
/// Operation
pub struct Operation<'item> {
table_name: &'item str,
number_of_columns: i32,
code: Action,
indirect: bool,
}
impl Operation<'_> {
/// Returns the table name.
#[inline]
pub fn table_name(&self) -> &str {
self.table_name
}
/// Returns the number of columns in table
#[inline]
pub fn number_of_columns(&self) -> i32 {
self.number_of_columns
}
/// Returns the action code.
#[inline]
pub fn code(&self) -> Action {
self.code
}
/// Returns `true` for an 'indirect' change.
#[inline]
pub fn indirect(&self) -> bool {
self.indirect
}
}
impl Drop for ChangesetIter<'_> {
#[inline]
fn drop(&mut self) {
unsafe {
ffi::sqlite3changeset_finalize(self.it);
}
}
}
/// An item passed to a conflict-handler by
/// [`Connection::apply`](Connection::apply), or an item generated by
/// [`ChangesetIter::next`](ChangesetIter::next).
// TODO enum ? Delete, Insert, Update, ...
pub struct ChangesetItem {
it: *mut ffi::sqlite3_changeset_iter,
}
impl ChangesetItem {
/// Obtain conflicting row values
///
/// May only be called with an `SQLITE_CHANGESET_DATA` or
/// `SQLITE_CHANGESET_CONFLICT` conflict handler callback.
#[inline]
pub fn conflict(&self, col: usize) -> Result<ValueRef<'_>> {
unsafe {
let mut p_value: *mut ffi::sqlite3_value = ptr::null_mut();
check(ffi::sqlite3changeset_conflict(
self.it,
col as i32,
&mut p_value,
))?;
Ok(ValueRef::from_value(p_value))
}
}
/// Determine the number of foreign key constraint violations
///
/// May only be called with an `SQLITE_CHANGESET_FOREIGN_KEY` conflict
/// handler callback.
#[inline]
pub fn fk_conflicts(&self) -> Result<i32> {
unsafe {
let mut p_out = 0;
check(ffi::sqlite3changeset_fk_conflicts(self.it, &mut p_out))?;
Ok(p_out)
}
}
/// Obtain new.* Values
///
/// May only be called if the type of change is either `SQLITE_UPDATE` or
/// `SQLITE_INSERT`.
#[inline]
pub fn new_value(&self, col: usize) -> Result<ValueRef<'_>> {
unsafe {
let mut p_value: *mut ffi::sqlite3_value = ptr::null_mut();
check(ffi::sqlite3changeset_new(self.it, col as i32, &mut p_value))?;
Ok(ValueRef::from_value(p_value))
}
}
/// Obtain old.* Values
///
/// May only be called if the type of change is either `SQLITE_DELETE` or
/// `SQLITE_UPDATE`.
#[inline]
pub fn old_value(&self, col: usize) -> Result<ValueRef<'_>> {
unsafe {
let mut p_value: *mut ffi::sqlite3_value = ptr::null_mut();
check(ffi::sqlite3changeset_old(self.it, col as i32, &mut p_value))?;
Ok(ValueRef::from_value(p_value))
}
}
/// Obtain the current operation
#[inline]
pub fn op(&self) -> Result<Operation<'_>> {
let mut number_of_columns = 0;
let mut code = 0;
let mut indirect = 0;
let tab = unsafe {
let mut pz_tab: *const c_char = ptr::null();
check(ffi::sqlite3changeset_op(
self.it,
&mut pz_tab,
&mut number_of_columns,
&mut code,
&mut indirect,
))?;
CStr::from_ptr(pz_tab)
};
let table_name = tab.to_str()?;
Ok(Operation {
table_name,
number_of_columns,
code: Action::from(code),
indirect: indirect != 0,
})
}
/// Obtain the primary key definition of a table
#[inline]
pub fn pk(&self) -> Result<&[u8]> {
let mut number_of_columns = 0;
unsafe {
let mut pks: *mut c_uchar = ptr::null_mut();
check(ffi::sqlite3changeset_pk(
self.it,
&mut pks,
&mut number_of_columns,
))?;
Ok(from_raw_parts(pks, number_of_columns as usize))
}
}
}
/// Used to combine two or more changesets or
/// patchsets
pub struct Changegroup {
cg: *mut ffi::sqlite3_changegroup,
}
impl Changegroup {
/// Create a new change group.
#[inline]
pub fn new() -> Result<Self> {
let mut cg = ptr::null_mut();
check(unsafe { ffi::sqlite3changegroup_new(&mut cg) })?;
Ok(Changegroup { cg })
}
/// Add a changeset
#[inline]
pub fn add(&mut self, cs: &Changeset) -> Result<()> {
check(unsafe { ffi::sqlite3changegroup_add(self.cg, cs.n, cs.cs) })
}
/// Add a changeset read from `input` to this change group.
#[inline]
pub fn add_stream(&mut self, input: &mut dyn Read) -> Result<()> {
let input_ref = &input;
check(unsafe {
ffi::sqlite3changegroup_add_strm(
self.cg,
Some(x_input),
input_ref as *const &mut dyn Read as *mut c_void,
)
})
}
/// Obtain a composite Changeset
#[inline]
pub fn output(&mut self) -> Result<Changeset> {
let mut n = 0;
let mut output: *mut c_void = ptr::null_mut();
check(unsafe { ffi::sqlite3changegroup_output(self.cg, &mut n, &mut output) })?;
Ok(Changeset { cs: output, n })
}
/// Write the combined set of changes to `output`.
#[inline]
pub fn output_strm(&mut self, output: &mut dyn Write) -> Result<()> {
let output_ref = &output;
check(unsafe {
ffi::sqlite3changegroup_output_strm(
self.cg,
Some(x_output),
output_ref as *const &mut dyn Write as *mut c_void,
)
})
}
}
impl Drop for Changegroup {
#[inline]
fn drop(&mut self) {
unsafe {
ffi::sqlite3changegroup_delete(self.cg);
}
}
}
impl Connection {
/// Apply a changeset to a database
pub fn apply<F, C>(&self, cs: &Changeset, filter: Option<F>, conflict: C) -> Result<()>
where
F: Fn(&str) -> bool + Send + RefUnwindSafe + 'static,
C: Fn(ConflictType, ChangesetItem) -> ConflictAction + Send + RefUnwindSafe + 'static,
{
let db = self.db.borrow_mut().db;
let filtered = filter.is_some();
let tuple = &mut (filter, conflict);
check(unsafe {
if filtered {
ffi::sqlite3changeset_apply(
db,
cs.n,
cs.cs,
Some(call_filter::<F, C>),
Some(call_conflict::<F, C>),
tuple as *mut (Option<F>, C) as *mut c_void,
)
} else {
ffi::sqlite3changeset_apply(
db,
cs.n,
cs.cs,
None,
Some(call_conflict::<F, C>),
tuple as *mut (Option<F>, C) as *mut c_void,
)
}
})
}
/// Apply a changeset to a database
pub fn apply_strm<F, C>(
&self,
input: &mut dyn Read,
filter: Option<F>,
conflict: C,
) -> Result<()>
where
F: Fn(&str) -> bool + Send + RefUnwindSafe + 'static,
C: Fn(ConflictType, ChangesetItem) -> ConflictAction + Send + RefUnwindSafe + 'static,
{
let input_ref = &input;
let db = self.db.borrow_mut().db;
let filtered = filter.is_some();
let tuple = &mut (filter, conflict);
check(unsafe {
if filtered {
ffi::sqlite3changeset_apply_strm(
db,
Some(x_input),
input_ref as *const &mut dyn Read as *mut c_void,
Some(call_filter::<F, C>),
Some(call_conflict::<F, C>),
tuple as *mut (Option<F>, C) as *mut c_void,
)
} else {
ffi::sqlite3changeset_apply_strm(
db,
Some(x_input),
input_ref as *const &mut dyn Read as *mut c_void,
None,
Some(call_conflict::<F, C>),
tuple as *mut (Option<F>, C) as *mut c_void,
)
}
})
}
}
/// Constants passed to the conflict handler
#[allow(missing_docs)]
#[repr(i32)]
#[derive(Debug, PartialEq, Eq)]
#[non_exhaustive]
#[allow(clippy::upper_case_acronyms)]
pub enum ConflictType {
UNKNOWN = -1,
SQLITE_CHANGESET_DATA = ffi::SQLITE_CHANGESET_DATA,
SQLITE_CHANGESET_NOTFOUND = ffi::SQLITE_CHANGESET_NOTFOUND,
SQLITE_CHANGESET_CONFLICT = ffi::SQLITE_CHANGESET_CONFLICT,
SQLITE_CHANGESET_CONSTRAINT = ffi::SQLITE_CHANGESET_CONSTRAINT,
SQLITE_CHANGESET_FOREIGN_KEY = ffi::SQLITE_CHANGESET_FOREIGN_KEY,
}
impl From<i32> for ConflictType {
fn from(code: i32) -> ConflictType {
match code {
ffi::SQLITE_CHANGESET_DATA => ConflictType::SQLITE_CHANGESET_DATA,
ffi::SQLITE_CHANGESET_NOTFOUND => ConflictType::SQLITE_CHANGESET_NOTFOUND,
ffi::SQLITE_CHANGESET_CONFLICT => ConflictType::SQLITE_CHANGESET_CONFLICT,
ffi::SQLITE_CHANGESET_CONSTRAINT => ConflictType::SQLITE_CHANGESET_CONSTRAINT,
ffi::SQLITE_CHANGESET_FOREIGN_KEY => ConflictType::SQLITE_CHANGESET_FOREIGN_KEY,
_ => ConflictType::UNKNOWN,
}
}
}
/// Constants returned by the conflict handler
#[allow(missing_docs)]
#[repr(i32)]
#[derive(Debug, PartialEq, Eq)]
#[non_exhaustive]
#[allow(clippy::upper_case_acronyms)]
pub enum ConflictAction {
SQLITE_CHANGESET_OMIT = ffi::SQLITE_CHANGESET_OMIT,
SQLITE_CHANGESET_REPLACE = ffi::SQLITE_CHANGESET_REPLACE,
SQLITE_CHANGESET_ABORT = ffi::SQLITE_CHANGESET_ABORT,
}
unsafe extern "C" fn call_filter<F, C>(p_ctx: *mut c_void, tbl_str: *const c_char) -> c_int
where
F: Fn(&str) -> bool + Send + RefUnwindSafe + 'static,
C: Fn(ConflictType, ChangesetItem) -> ConflictAction + Send + RefUnwindSafe + 'static,
{
use std::str;
let tuple: *mut (Option<F>, C) = p_ctx as *mut (Option<F>, C);
let tbl_name = {
let c_slice = CStr::from_ptr(tbl_str).to_bytes();
str::from_utf8(c_slice)
};
match *tuple {
(Some(ref filter), _) => c_int::from(
catch_unwind(|| filter(tbl_name.expect("illegal table name"))).unwrap_or_default(),
),
_ => unimplemented!(),
}
}
unsafe extern "C" fn call_conflict<F, C>(
p_ctx: *mut c_void,
e_conflict: c_int,
p: *mut ffi::sqlite3_changeset_iter,
) -> c_int
where
F: Fn(&str) -> bool + Send + RefUnwindSafe + 'static,
C: Fn(ConflictType, ChangesetItem) -> ConflictAction + Send + RefUnwindSafe + 'static,
{
let tuple: *mut (Option<F>, C) = p_ctx as *mut (Option<F>, C);
let conflict_type = ConflictType::from(e_conflict);
let item = ChangesetItem { it: p };
if let Ok(action) = catch_unwind(|| (*tuple).1(conflict_type, item)) {
action as c_int
} else {
ffi::SQLITE_CHANGESET_ABORT
}
}
unsafe extern "C" fn x_input(p_in: *mut c_void, data: *mut c_void, len: *mut c_int) -> c_int {
if p_in.is_null() {
return ffi::SQLITE_MISUSE;
}
let bytes: &mut [u8] = from_raw_parts_mut(data as *mut u8, *len as usize);
let input = p_in as *mut &mut dyn Read;
match (*input).read(bytes) {
Ok(n) => {
*len = n as i32; // TODO Validate: n = 0 may not mean the reader will always no longer be able to
// produce bytes.
ffi::SQLITE_OK
}
Err(_) => ffi::SQLITE_IOERR_READ, // TODO check if err is a (ru)sqlite Error => propagate
}
}
unsafe extern "C" fn x_output(p_out: *mut c_void, data: *const c_void, len: c_int) -> c_int {
if p_out.is_null() {
return ffi::SQLITE_MISUSE;
}
// The sessions module never invokes an xOutput callback with the third
// parameter set to a value less than or equal to zero.
let bytes: &[u8] = from_raw_parts(data as *const u8, len as usize);
let output = p_out as *mut &mut dyn Write;
match (*output).write_all(bytes) {
Ok(_) => ffi::SQLITE_OK,
Err(_) => ffi::SQLITE_IOERR_WRITE, // TODO check if err is a (ru)sqlite Error => propagate
}
}
#[cfg(test)]
mod test {
use fallible_streaming_iterator::FallibleStreamingIterator;
use std::io::Read;
use std::sync::atomic::{AtomicBool, Ordering};
use super::{Changeset, ChangesetIter, ConflictAction, ConflictType, Session};
use crate::hooks::Action;
use crate::{Connection, Result};
fn one_changeset() -> Result<Changeset> {
let db = Connection::open_in_memory()?;
db.execute_batch("CREATE TABLE foo(t TEXT PRIMARY KEY NOT NULL);")?;
let mut session = Session::new(&db)?;
assert!(session.is_empty());
session.attach(None)?;
db.execute("INSERT INTO foo (t) VALUES (?1);", ["bar"])?;
session.changeset()
}
fn one_changeset_strm() -> Result<Vec<u8>> {
let db = Connection::open_in_memory()?;
db.execute_batch("CREATE TABLE foo(t TEXT PRIMARY KEY NOT NULL);")?;
let mut session = Session::new(&db)?;
assert!(session.is_empty());
session.attach(None)?;
db.execute("INSERT INTO foo (t) VALUES (?1);", ["bar"])?;
let mut output = Vec::new();
session.changeset_strm(&mut output)?;
Ok(output)
}
#[test]
fn test_changeset() -> Result<()> {
let changeset = one_changeset()?;
let mut iter = changeset.iter()?;
let item = iter.next()?;
assert!(item.is_some());
let item = item.unwrap();
let op = item.op()?;
assert_eq!("foo", op.table_name());
assert_eq!(1, op.number_of_columns());
assert_eq!(Action::SQLITE_INSERT, op.code());
assert!(!op.indirect());
let pk = item.pk()?;
assert_eq!(&[1], pk);
let new_value = item.new_value(0)?;
assert_eq!(Ok("bar"), new_value.as_str());
Ok(())
}
#[test]
fn test_changeset_strm() -> Result<()> {
let output = one_changeset_strm()?;
assert!(!output.is_empty());
assert_eq!(14, output.len());
let input: &mut dyn Read = &mut output.as_slice();
let mut iter = ChangesetIter::start_strm(&input)?;
let item = iter.next()?;
assert!(item.is_some());
Ok(())
}
#[test]
fn test_changeset_apply() -> Result<()> {
let changeset = one_changeset()?;
let db = Connection::open_in_memory()?;
db.execute_batch("CREATE TABLE foo(t TEXT PRIMARY KEY NOT NULL);")?;
static CALLED: AtomicBool = AtomicBool::new(false);
db.apply(
&changeset,
None::<fn(&str) -> bool>,
|_conflict_type, _item| {
CALLED.store(true, Ordering::Relaxed);
ConflictAction::SQLITE_CHANGESET_OMIT
},
)?;
assert!(!CALLED.load(Ordering::Relaxed));
let check = db.query_row("SELECT 1 FROM foo WHERE t = ?1", ["bar"], |row| {
row.get::<_, i32>(0)
})?;
assert_eq!(1, check);
// conflict expected when same changeset applied again on the same db
db.apply(
&changeset,
None::<fn(&str) -> bool>,
|conflict_type, item| {
CALLED.store(true, Ordering::Relaxed);
assert_eq!(ConflictType::SQLITE_CHANGESET_CONFLICT, conflict_type);
let conflict = item.conflict(0).unwrap();
assert_eq!(Ok("bar"), conflict.as_str());
ConflictAction::SQLITE_CHANGESET_OMIT
},
)?;
assert!(CALLED.load(Ordering::Relaxed));
Ok(())
}
#[test]
fn test_changeset_apply_strm() -> Result<()> {
let output = one_changeset_strm()?;
let db = Connection::open_in_memory()?;
db.execute_batch("CREATE TABLE foo(t TEXT PRIMARY KEY NOT NULL);")?;
let mut input = output.as_slice();
db.apply_strm(
&mut input,
None::<fn(&str) -> bool>,
|_conflict_type, _item| ConflictAction::SQLITE_CHANGESET_OMIT,
)?;
let check = db.query_row("SELECT 1 FROM foo WHERE t = ?1", ["bar"], |row| {
row.get::<_, i32>(0)
})?;
assert_eq!(1, check);
Ok(())
}
#[test]
fn test_session_empty() -> Result<()> {
let db = Connection::open_in_memory()?;
db.execute_batch("CREATE TABLE foo(t TEXT PRIMARY KEY NOT NULL);")?;
let mut session = Session::new(&db)?;
assert!(session.is_empty());
session.attach(None)?;
db.execute("INSERT INTO foo (t) VALUES (?1);", ["bar"])?;
assert!(!session.is_empty());
Ok(())
}
#[test]
fn test_session_set_enabled() -> Result<()> {
let db = Connection::open_in_memory()?;
let mut session = Session::new(&db)?;
assert!(session.is_enabled());
session.set_enabled(false);
assert!(!session.is_enabled());
Ok(())
}
#[test]
fn test_session_set_indirect() -> Result<()> {
let db = Connection::open_in_memory()?;
let mut session = Session::new(&db)?;
assert!(!session.is_indirect());
session.set_indirect(true);
assert!(session.is_indirect());
Ok(())
}
}