oak_graphql/builder/
mod.rs

1use crate::{
2    ast,
3    ast::*,
4    language::GraphQLLanguage,
5    lexer::token_type::GraphQLTokenType,
6    parser::{GraphQLParser, element_type::GraphQLElementType},
7};
8use oak_core::{Builder, BuilderCache, GreenNode, OakDiagnostics, OakError, Parser, Range, RedNode, RedTree, SourceText, TextEdit, TokenType, builder::BuildOutput, source::Source};
9
10/// AST builder for GraphQL.
11#[derive(Clone)]
12pub struct GraphQLBuilder<'config> {
13    config: &'config GraphQLLanguage,
14}
15
16impl<'config> GraphQLBuilder<'config> {
17    /// Creates a new GraphQL builder.
18    pub fn new(config: &'config GraphQLLanguage) -> Self {
19        Self { config }
20    }
21
22    fn get_text(&self, span: Range<usize>, source: &SourceText) -> String {
23        source.text()[span].to_string()
24    }
25}
26
27impl<'config> Builder<GraphQLLanguage> for GraphQLBuilder<'config> {
28    fn build<'a, S: Source + ?Sized>(&self, source: &S, edits: &[TextEdit], _cache: &'a mut impl BuilderCache<GraphQLLanguage>) -> BuildOutput<GraphQLLanguage> {
29        let parser = GraphQLParser::new(self.config);
30        let mut parse_cache = oak_core::parser::session::ParseSession::<GraphQLLanguage>::default();
31        let parse_result = parser.parse(source, edits, &mut parse_cache);
32
33        match parse_result.result {
34            Ok(green_tree) => {
35                let source_text = SourceText::new(source.get_text_in((0..source.length()).into()).into_owned());
36                match self.build_root(green_tree, &source_text) {
37                    Ok(ast_root) => OakDiagnostics { result: Ok(ast_root), diagnostics: parse_result.diagnostics },
38                    Err(build_error) => {
39                        let mut diagnostics = parse_result.diagnostics;
40                        diagnostics.push(build_error.clone());
41                        OakDiagnostics { result: Err(build_error), diagnostics }
42                    }
43                }
44            }
45            Err(parse_error) => OakDiagnostics { result: Err(parse_error), diagnostics: parse_result.diagnostics },
46        }
47    }
48}
49
50impl<'config> GraphQLBuilder<'config> {
51    pub(crate) fn build_root<'a>(&self, green_tree: &'a GreenNode<'a, GraphQLLanguage>, source: &SourceText) -> Result<GraphQLRoot, OakError> {
52        let root_node = RedNode::new(green_tree, 0);
53        let mut definitions = Vec::new();
54
55        for child in root_node.children() {
56            if let RedTree::Node(n) = child {
57                match n.green.kind {
58                    GraphQLElementType::QueryKeyword | GraphQLElementType::MutationKeyword | GraphQLElementType::SubscriptionKeyword => {
59                        definitions.push(Definition::Operation(self.build_operation_definition(n, source)?));
60                    }
61                    GraphQLElementType::FragmentKeyword => {
62                        definitions.push(Definition::Fragment(self.build_fragment_definition(n, source)?));
63                    }
64                    GraphQLElementType::SchemaKeyword => {
65                        definitions.push(Definition::Schema(self.build_schema_definition(n, source)?));
66                    }
67                    GraphQLElementType::TypeKeyword => {
68                        definitions.push(Definition::Type(self.build_type_definition(n, source)?));
69                    }
70                    _ => {
71                        // Handle other definition types as needed
72                    }
73                }
74            }
75        }
76
77        Ok(GraphQLRoot { document: Document { definitions, span: root_node.span() } })
78    }
79
80    fn build_operation_definition<'a>(&self, node: RedNode<'a, GraphQLLanguage>, source: &SourceText) -> Result<OperationDefinition, OakError> {
81        let mut operation_type = OperationType::Query;
82        let mut name = None;
83
84        for child in node.children() {
85            match child {
86                RedTree::Leaf(t) => match t.kind {
87                    GraphQLTokenType::QueryKeyword => operation_type = OperationType::Query,
88                    GraphQLTokenType::MutationKeyword => operation_type = OperationType::Mutation,
89                    GraphQLTokenType::SubscriptionKeyword => operation_type = OperationType::Subscription,
90                    GraphQLTokenType::Name => name = Some(self.get_text(t.span.clone(), source)),
91                    _ => {}
92                },
93                _ => {}
94            }
95        }
96
97        Ok(OperationDefinition { operation_type, name, span: node.span() })
98    }
99
100    fn build_fragment_definition<'a>(&self, node: RedNode<'a, GraphQLLanguage>, source: &SourceText) -> Result<FragmentDefinition, OakError> {
101        let mut name = String::new();
102
103        for child in node.children() {
104            if let RedTree::Leaf(t) = child {
105                if t.kind == GraphQLTokenType::Name {
106                    name = self.get_text(t.span.clone(), source);
107                }
108            }
109        }
110
111        Ok(FragmentDefinition { name, span: node.span() })
112    }
113
114    fn build_schema_definition<'a>(&self, node: RedNode<'a, GraphQLLanguage>, _source: &SourceText) -> Result<SchemaDefinition, OakError> {
115        Ok(SchemaDefinition { span: node.span() })
116    }
117
118    fn build_type_definition<'a>(&self, node: RedNode<'a, GraphQLLanguage>, source: &SourceText) -> Result<TypeDefinition, OakError> {
119        let mut name = String::new();
120
121        for child in node.children() {
122            if let RedTree::Leaf(t) = child {
123                if t.kind == GraphQLTokenType::Name {
124                    name = self.get_text(t.span.clone(), source);
125                }
126            }
127        }
128
129        Ok(TypeDefinition { name, span: node.span() })
130    }
131}
oak_graphql/builder/mod.rs

oak_graphql/builder/
mod.rs
