oak_nginx/builder/
mod.rs

1use crate::{ast::*, language::NginxLanguage, lexer::token_type::NginxTokenType, parser::element_type::NginxElementType};
2use oak_core::{
3    Builder, BuilderCache, GreenNode, Lexer, OakDiagnostics, OakError, Parser, RedNode, RedTree, TextEdit,
4    source::{Source, SourceText},
5};
6
7/// Builder for Nginx AST, coordinating lexing and parsing.
8pub struct NginxBuilder<'config> {
9    config: &'config NginxLanguage,
10}
11
12impl<'config> NginxBuilder<'config> {
13    /// Creates a new `NginxBuilder` with the given configuration.
14    pub fn new(config: &'config NginxLanguage) -> Self {
15        Self { config }
16    }
17}
18
19impl<'config> Builder<NginxLanguage> for NginxBuilder<'config> {
20    fn build<'a, S: Source + ?Sized>(&self, source: &S, edits: &[TextEdit], _cache: &'a mut impl BuilderCache<NginxLanguage>) -> OakDiagnostics<NginxRoot> {
21        let parser = crate::parser::NginxParser::new(self.config);
22        let lexer = crate::lexer::NginxLexer::new(&self.config);
23
24        let mut session = oak_core::parser::session::ParseSession::<NginxLanguage>::default();
25        lexer.lex(source, edits, &mut session);
26        let parse_result = parser.parse(source, edits, &mut session);
27
28        match parse_result.result {
29            Ok(green_tree) => {
30                let source_text = SourceText::new(source.get_text_in((0..source.length()).into()).into_owned());
31                match self.build_root(green_tree, &source_text) {
32                    Ok(ast_root) => OakDiagnostics { result: Ok(ast_root), diagnostics: parse_result.diagnostics },
33                    Err(build_error) => {
34                        let mut diagnostics = parse_result.diagnostics;
35                        diagnostics.push(build_error.clone());
36                        OakDiagnostics { result: Err(build_error), diagnostics }
37                    }
38                }
39            }
40            Err(parse_error) => OakDiagnostics { result: Err(parse_error), diagnostics: parse_result.diagnostics },
41        }
42    }
43}
44
45impl<'config> NginxBuilder<'config> {
46    pub(crate) fn build_root(&self, green_tree: &GreenNode<NginxLanguage>, source: &SourceText) -> Result<NginxRoot, OakError> {
47        let red_root = RedNode::new(green_tree, 0);
48        let mut items = Vec::new();
49
50        for child in red_root.children() {
51            if let RedTree::Node(node) = child {
52                match node.green.kind {
53                    NginxElementType::Directive => {
54                        items.push(NginxItem::Directive(self.build_directive(node, source)?));
55                    }
56                    NginxElementType::Block => {
57                        items.push(NginxItem::Block(self.build_block(node, source)?));
58                    }
59                    NginxElementType::Comment => {
60                        items.push(NginxItem::Comment(self.build_comment(node, source)?));
61                    }
62                    _ => {}
63                }
64            }
65        }
66
67        Ok(NginxRoot { range: red_root.span(), items })
68    }
69
70    fn build_directive(&self, node: RedNode<NginxLanguage>, source: &SourceText) -> Result<Directive, OakError> {
71        let mut name = String::new();
72        let mut parameters = Vec::new();
73        let mut children = node.children();
74
75        // The first non-whitespace/non-comment token should be the directive name
76        while let Some(child) = children.next() {
77            match child {
78                RedTree::Leaf(t) => {
79                    if t.kind != NginxTokenType::Whitespace && t.kind != NginxTokenType::CommentToken {
80                        name = source.get_text_in(t.span()).as_ref().to_string();
81                        break;
82                    }
83                }
84                _ => {}
85            }
86        }
87
88        // Subsequent children are parameters or punctuation
89        for child in children {
90            match child {
91                RedTree::Node(n) if n.green.kind == NginxElementType::Parameter => {
92                    parameters.push(source.get_text_in(n.span()).as_ref().trim().to_string());
93                }
94                RedTree::Leaf(t) if t.kind != NginxTokenType::Whitespace && t.kind != NginxTokenType::Semicolon && t.kind != NginxTokenType::CommentToken => {
95                    parameters.push(source.get_text_in(t.span()).as_ref().to_string());
96                }
97                _ => {}
98            }
99        }
100
101        Ok(Directive { name, parameters, range: node.span() })
102    }
103
104    fn build_block(&self, node: RedNode<NginxLanguage>, source: &SourceText) -> Result<Block, OakError> {
105        let mut name = String::new();
106        let mut parameters = Vec::new();
107        let mut items = Vec::new();
108        let mut children = node.children();
109
110        // First non-whitespace/non-comment token is block name (http, server, etc.)
111        while let Some(child) = children.next() {
112            match child {
113                RedTree::Leaf(t) => {
114                    if t.kind != NginxTokenType::Whitespace && t.kind != NginxTokenType::CommentToken {
115                        name = source.get_text_in(t.span()).as_ref().to_string();
116                        break;
117                    }
118                }
119                _ => {}
120            }
121        }
122
123        // Parameters and items
124        for child in children {
125            match child {
126                RedTree::Node(n) => match n.green.kind {
127                    NginxElementType::Parameter => {
128                        parameters.push(source.get_text_in(n.span()).as_ref().trim().to_string());
129                    }
130                    NginxElementType::Directive => {
131                        items.push(NginxItem::Directive(self.build_directive(n, source)?));
132                    }
133                    NginxElementType::Block => {
134                        items.push(NginxItem::Block(self.build_block(n, source)?));
135                    }
136                    NginxElementType::Comment => {
137                        items.push(NginxItem::Comment(self.build_comment(n, source)?));
138                    }
139                    _ => {}
140                },
141                RedTree::Leaf(t) if t.kind != NginxTokenType::Whitespace && t.kind != NginxTokenType::LeftBrace && t.kind != NginxTokenType::RightBrace && t.kind != NginxTokenType::CommentToken => {
142                    parameters.push(source.get_text_in(t.span()).as_ref().to_string());
143                }
144                _ => {}
145            }
146        }
147
148        Ok(Block { name, parameters, items, range: node.span() })
149    }
150
151    fn build_comment(&self, node: RedNode<NginxLanguage>, source: &SourceText) -> Result<Comment, OakError> {
152        Ok(Comment { text: source.get_text_in(node.span()).as_ref().to_string(), range: node.span() })
153    }
154}
oak_nginx/builder/mod.rs

oak_nginx/builder/
mod.rs
