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use super::parser::{
Statement,
StatementValue,
DefinitionType,
Setter,
Definition
};
use super::lexer::{
DefinitionType as TokenDefinitionType,
TypeIdentifierType as TokenTypeIdentifierType,
Token,
TokenValue,
};
use std::fs::File;
use std::io::Write;
use std::collections::HashMap;
use std::ops::Range;
#[derive(Debug)]
pub struct CachedRawDefinition {
props: HashMap<String, (TokenTypeIdentifierType, TokenDefinitionType)>,
args: Vec<(String, TokenTypeIdentifierType, TokenDefinitionType)>,
inherits: Vec<String>,
range: Range<usize>
}
#[derive(Debug)]
pub enum CachedDefinition {
Raw(CachedRawDefinition),
Collective(String)
}
#[derive(Debug)]
pub struct Generator {
statements: Vec<Statement>,
definitions: HashMap<String, CachedDefinition>,
header: String
}
impl Generator {
fn is_valid_type(token: &Token, expected_type: &TokenTypeIdentifierType) -> Result<bool, (String, Range<usize>)> {
match token.value {
TokenValue::Bool(_) => {
Ok(matches!(expected_type, TokenTypeIdentifierType::Bool))
},
TokenValue::Number(_) => {
Ok(matches!(expected_type, TokenTypeIdentifierType::Number))
},
TokenValue::String(_) => {
Ok(matches!(expected_type, TokenTypeIdentifierType::String))
},
_ => Err((format!("{} is not a primitive and therefore it's type cannot be checked", token.to_string()), token.range.clone()))
}
}
fn get_prop_from_definition(&self, definition: &CachedRawDefinition, definition_name: &String, setter: &Setter) -> Result<(TokenTypeIdentifierType, TokenDefinitionType), (String, Range<usize>)> {
if let Some(prop) = definition.props.get(setter.name.as_str()) {
Ok(prop.clone())
} else {
for definition_name in &definition.inherits {
if let Some(parent_definition) = self.definitions.get(definition_name) {
if let CachedDefinition::Raw(parent_definition) = parent_definition {
if let Ok(result) = self.get_prop_from_definition(parent_definition, definition_name, setter) {
return Ok(result);
}
} else {
return Err((format!("cannot inherit collective definition '{}'", definition_name), definition.range.clone()))
}
} else {
return Err((format!("inherited undefined definition '{}'", definition_name), definition.range.clone()))
}
}
return Err((format!("no such property on '{}' called '{}'", definition_name, setter.name.as_str()), setter.range.clone()));
}
}
pub fn generate_from_collective(&self, children: &Vec<Statement>) -> Result<String, (String, Range<usize>)> {
let mut result = String::new();
for child in children {
match &child.value {
StatementValue::Object(object) => {
if let Some(definition) = self.definitions.get(&object.name) {
match definition {
CachedDefinition::Raw(definition) => {
if definition.args.len() != object.arguments.len() {
return Err((format!("the '{}' definition expects {} args, {} given", object.name, definition.args.len(), object.arguments.len()), child.range.clone()));
}
let mut inlines: Vec<(String, String)> = Vec::new();
let mut children: Vec<(String, String)> = Vec::new();
for i in 0..definition.args.len() {
let defined_arg = &definition.args[i];
let actual_arg = &object.arguments[i];
if let Ok(is_valid) = Generator::is_valid_type(&actual_arg, &defined_arg.1) {
if is_valid {
match defined_arg.2 {
TokenDefinitionType::InlineArg => {
inlines.push((defined_arg.0.clone(), actual_arg.value_to_string()));
},
TokenDefinitionType::ChildArg => {
children.push((defined_arg.0.clone(), actual_arg.value_to_string()));
},
_ => return Err((format!("expected either an InlineArg or a ChildArg, got {}", defined_arg.2.to_string()), actual_arg.range.clone()))
}
}
}
}
for setter in &object.setters {
let defined_prop = self.get_prop_from_definition(definition, &object.name, &setter);
let actual_prop = &setter.value;
match defined_prop {
Ok(defined_prop) => {
if let Ok(is_valid) = Generator::is_valid_type(&actual_prop, &defined_prop.0) {
if is_valid {
match defined_prop.1 {
TokenDefinitionType::InlineProp => {
inlines.push((setter.name.clone(), actual_prop.value_to_string()));
},
TokenDefinitionType::ChildProp => {
children.push((setter.name.clone(), actual_prop.value_to_string()));
},
_ => return Err((format!("expected either an InlineArg or a ChildArg, got {}", defined_prop.1.to_string()), actual_prop.range.clone()))
}
}
}
},
Err(err) => return Err(err)
}
}
result += "<object class=\"";
result += object.name.as_str();
result += "\"";
for inline in &inlines {
result += " ";
result += inline.0.as_str();
result += "=\"";
result += inline.1.as_str();
result += "\"";
}
result += ">\n";
for child in &children {
result += "<property name=\"";
result += child.0.as_str();
result += "\">";
result += child.1.as_str();
result += "</property>\n";
}
for child in &object.children {
let child = vec![child.clone()];
match self.generate_from_collective(&child) {
Ok(collective) => {
result += "<child>\n";
result += collective.as_str();
result += "</child>\n";
},
Err(err) => return Err(err)
}
}
result += "</object>\n"
},
CachedDefinition::Collective(defintion) => {
result += defintion.as_str();
}
}
}
},
_ => return Err((format!("found {}, expected object in collective definition", child.to_string()), child.range.clone()))
}
}
Ok(result)
}
pub fn generate_from_raw(&self, definition: &Definition, range: Range<usize>) -> Result<CachedRawDefinition, (String, Range<usize>)> {
let mut props: HashMap<String, (TokenTypeIdentifierType, TokenDefinitionType)> = HashMap::new();
let mut args: Vec<(String, TokenTypeIdentifierType, TokenDefinitionType)> = Vec::new();
let properties = &definition.children;
let inherits = &definition.inherits;
for property in properties {
if let StatementValue::Property(property_value) = &property.value {
match property_value.definition_type {
TokenDefinitionType::InlineProp | TokenDefinitionType::ChildProp => {
props.insert(property_value.name.clone(), (property_value.internal_type.clone(), property_value.definition_type.clone()));
},
TokenDefinitionType::InlineArg | TokenDefinitionType::ChildArg => {
args.push((property_value.name.clone(), property_value.internal_type.clone(), property_value.definition_type.clone()));
},
_ => return Err((format!("expected a property definition, found {}", property_value.definition_type.to_string()), property.range.clone()))
}
}
}
for parent_name in inherits {
if let Some(parent) = self.definitions.get(parent_name) {
if let CachedDefinition::Collective(_) = parent {
return Err((format!("cannot inherit collective definition '{}'", parent_name), range))
}
} else {
return Err((format!("'{}' cannot inherit undefined definition '{}'", definition.name, parent_name), range));
}
}
Ok(CachedRawDefinition {
inherits: inherits.clone(),
range, props, args
})
}
pub fn generate(&mut self) -> Result<(), (String, Range<usize>)> {
for statement in &self.statements {
match &statement.value {
StatementValue::Definition(definition) => {
match &definition.definition_type {
DefinitionType::Root(filename) => {
let mut file_content = String::new();
match self.generate_from_collective(&definition.children) {
Ok(collective) => {
file_content.push_str(collective.as_str());
},
Err(err) => return Err(err)
}
file_content.push_str("</interface>");
let mut file = File::create(format!("{}.ui", filename)).expect("failed to create output file");
writeln!(file, "{}", self.header).expect("failed to write to output file");
writeln!(file, "{}", file_content).expect("failed to write to output file");
},
DefinitionType::Collective => {
match self.generate_from_collective(&definition.children) {
Ok(collective) => {
self.definitions.insert(definition.name.clone(), CachedDefinition::Collective(collective));
},
Err(err) => return Err(err)
}
},
DefinitionType::Raw => {
match self.generate_from_raw(&definition, statement.range.clone()) {
Ok(raw) => {
self.definitions.insert(definition.name.clone(), CachedDefinition::Raw(raw));
},
Err(err) => return Err(err)
}
}
}
},
StatementValue::Header(header) => {
self.header.push_str(header);
self.header.push('\n');
},
_ => return Err((format!("this should never ever ever ever ever happen. something must be wrong with the parser if this does happen"), statement.range.clone()))
}
}
Ok(())
}
pub fn new(statements: Vec<Statement>) -> Self {
Generator {
statements,
definitions: HashMap::new(),
header: String::from("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<interface>\n")
}
}
}