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use std::ffi::CStr;
use std::rc::Rc;
use crate::mgp::*;
use crate::result::*;
use crate::rsmgp::*;
use crate::vertex::*;
#[double]
use crate::mgp::ffi;
use mockall_double::double;
#[derive(Debug)]
struct MgpMemgraph {
args: *const mgp_list,
graph: *const mgp_graph,
result: *mut mgp_result,
memory: *mut mgp_memory,
module: *mut mgp_module,
}
#[derive(Debug, Clone)]
pub struct Memgraph {
memgraph: Rc<MgpMemgraph>,
}
impl Memgraph {
pub fn new(
args: *const mgp_list,
graph: *const mgp_graph,
result: *mut mgp_result,
memory: *mut mgp_memory,
module: *mut mgp_module,
) -> Memgraph {
Memgraph {
memgraph: Rc::new(MgpMemgraph {
args,
graph,
result,
memory,
module,
}),
}
}
pub fn new_default() -> Memgraph {
Memgraph {
memgraph: Rc::new(MgpMemgraph {
args: std::ptr::null(),
graph: std::ptr::null(),
result: std::ptr::null_mut(),
memory: std::ptr::null_mut(),
module: std::ptr::null_mut(),
}),
}
}
pub fn args(&self) -> *const mgp_list {
self.memgraph.args
}
pub fn graph(&self) -> *const mgp_graph {
self.memgraph.graph
}
pub fn result(&self) -> *mut mgp_result {
self.memgraph.result
}
pub fn memory(&self) -> *mut mgp_memory {
self.memgraph.memory
}
pub fn module(&self) -> *mut mgp_module {
self.memgraph.module
}
pub fn vertices_iter(&self) -> MgpResult<VerticesIterator> {
unsafe {
let mgp_iterator = ffi::mgp_graph_iter_vertices(self.graph(), self.memory());
if mgp_iterator.is_null() {
return Err(MgpError::UnableToCreateGraphVerticesIterator);
}
Ok(VerticesIterator::new(mgp_iterator, &self))
}
}
pub fn vertex_by_id(&self, id: i64) -> MgpResult<Vertex> {
unsafe {
let mgp_vertex = ffi::mgp_graph_get_vertex_by_id(
self.graph(),
mgp_vertex_id { as_int: id },
self.memory(),
);
if mgp_vertex.is_null() {
return Err(MgpError::UnableToFindVertexById);
}
Ok(Vertex::new(mgp_vertex, &self))
}
}
pub fn result_record(&self) -> MgpResult<MgpResultRecord> {
MgpResultRecord::new(self)
}
pub fn add_read_procedure(
&self,
proc_ptr: extern "C" fn(
*const mgp_list,
*const mgp_graph,
*mut mgp_result,
*mut mgp_memory,
),
name: &CStr,
result_fields: &[ResultFieldType],
) -> MgpResult<()> {
unsafe {
let procedure =
ffi::mgp_module_add_read_procedure(self.module(), name.as_ptr(), Some(proc_ptr));
if procedure.is_null() {
return Err(MgpError::UnableToRegisterReadProcedure);
}
for result_field in result_fields {
let mut mgp_type: *const mgp_type = std::ptr::null_mut();
for field_type in result_field.types.iter().rev() {
mgp_type = match field_type {
FieldType::Any => ffi::mgp_type_any(),
FieldType::Bool => ffi::mgp_type_bool(),
FieldType::Number => ffi::mgp_type_number(),
FieldType::Int => ffi::mgp_type_int(),
FieldType::Double => ffi::mgp_type_float(),
FieldType::String => ffi::mgp_type_string(),
FieldType::Map => ffi::mgp_type_map(),
FieldType::Vertex => ffi::mgp_type_node(),
FieldType::Edge => ffi::mgp_type_relationship(),
FieldType::Path => ffi::mgp_type_path(),
FieldType::Nullable => ffi::mgp_type_nullable(mgp_type),
FieldType::List => ffi::mgp_type_list(mgp_type),
};
}
if ffi::mgp_proc_add_result(procedure, result_field.name.as_ptr(), mgp_type) == 0 {
return Err(MgpError::AddProcedureParameterTypeError);
}
}
Ok(())
}
}
}
#[cfg(test)]
mod tests;