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use crate::{
FieldType,
FieldValue,
ObjectTypeStore,
SelectionSet,
convert_field_value_store_to_json_string,
update::insert_field_value_relation_opposing_into_field_value_store
};
use std::error::Error;
pub fn delete(
object_type_store: &mut ObjectTypeStore,
object_type_name: &str,
id_option: Option<String>,
ids_option: Option<Vec<String>>,
selection_set: &SelectionSet
) -> Result<Vec<String>, Box<dyn Error>> {
remove_opposing_relation_ids(
object_type_store,
object_type_name,
&id_option,
&ids_option
)?;
let object_type = object_type_store.get_mut(object_type_name).ok_or("Should exist")?;
match id_option {
Some(id) => {
let field_value_store_option = object_type.field_values_store.get(&id);
if let Some(field_value_store) = field_value_store_option {
let cloned = field_value_store.clone();
object_type.field_values_store.remove(&id);
let json_result_string = convert_field_value_store_to_json_string(
object_type_store,
&cloned,
selection_set
);
return Ok(vec![json_result_string]);
}
else {
return Ok(vec![]);
}
},
None => {
match ids_option {
Some(ids) => {
let json_result_strings = ids.into_iter().fold(vec![], |result, id| {
let object_type = object_type_store.get_mut(object_type_name).expect("should work, better error needed");
let field_value_store_option = object_type.field_values_store.get(&id);
if let Some(field_value_store) = field_value_store_option {
let cloned = field_value_store.clone();
object_type.field_values_store.remove(&id);
let json_result_string = convert_field_value_store_to_json_string(
object_type_store,
&cloned,
selection_set
);
return result.into_iter().chain(vec![json_result_string]).collect();
}
else {
return result;
}
});
return Ok(json_result_strings);
},
None => {
return Ok(vec![]);
}
};
}
};
}
fn remove_opposing_relation_ids(
object_type_store: &mut ObjectTypeStore,
object_type_name: &str,
id_option: &Option<String>,
ids_option: &Option<Vec<String>>
) -> Result<(), Box<dyn Error>> {
if let Some(id) = id_option {
remove_opposing_relation_ids_for_id(
object_type_store,
object_type_name,
id
)?;
}
if let Some(ids) = ids_option {
for id in ids {
remove_opposing_relation_ids_for_id(
object_type_store,
object_type_name,
id
)?;
}
}
return Ok(());
}
fn remove_opposing_relation_ids_for_id(
object_type_store: &mut ObjectTypeStore,
object_type_name: &str,
id: &str
) -> Result<(), Box<dyn Error>> {
let object_type = object_type_store.get_mut(object_type_name).ok_or("Should exist")?;
let field_types_store = object_type.field_types_store.clone();
let field_value_store = object_type.field_values_store.get(id).ok_or("None")?.clone();
for field_value_tuple in field_value_store {
let field_value = field_value_tuple.1;
let field_type = field_types_store.get(&field_value_tuple.0).ok_or("None")?;
match field_type {
FieldType::RelationMany((_, field_type_relation_many_info)) => {
if let Some(opposing_field_name) = &field_type_relation_many_info.opposing_field_name {
let relation_primary_keys = match field_value {
FieldValue::RelationMany(field_value_relation_many_option) => {
if let Some(field_value_relation_many) = field_value_relation_many_option {
Some(field_value_relation_many.relation_primary_keys)
}
else {
None
}
},
_ => {
return Err("must be a FieldValue::RelationOne".into());
}
};
if relation_primary_keys == None {
continue;
}
for relation_primary_key in relation_primary_keys.ok_or("None")? {
insert_field_value_relation_opposing_into_field_value_store(
object_type_store,
object_type_name,
&field_type_relation_many_info,
&opposing_field_name,
&relation_primary_key,
id,
false
)?;
}
}
},
FieldType::RelationOne((_, field_type_relation_one_info)) => {
if let Some(opposing_field_name) = &field_type_relation_one_info.opposing_field_name {
let relation_primary_key = match field_value {
FieldValue::RelationOne(field_value_relation_one_option) => {
if let Some(field_value_relation_one) = field_value_relation_one_option {
Some(field_value_relation_one.relation_primary_key)
}
else {
None
}
},
_ => {
return Err("must be a FieldValue::RelationOne".into());
}
};
if relation_primary_key == None {
continue;
}
insert_field_value_relation_opposing_into_field_value_store(
object_type_store,
object_type_name,
&field_type_relation_one_info,
&opposing_field_name,
&relation_primary_key.ok_or("None")?,
id,
false
)?;
}
},
_ => continue
};
}
return Ok(());
}