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Copy pathstructure-analyzer.ts
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322 lines (275 loc) · 9.04 KB
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import type { EditorState } from "@codemirror/state";
import type { SqlParseError, SqlParser } from "./types.js";
/**
* Represents a SQL statement with position information
*/
export interface SqlStatement {
/** Start position of the statement in the document */
from: number;
/** End position of the statement in the document */
to: number;
/** First line number of the statement (1-based) */
lineFrom: number;
/** Last line number of the statement (1-based) */
lineTo: number;
/** The actual SQL content */
content: string;
/** Type of SQL statement */
type: "select" | "insert" | "update" | "delete" | "create" | "drop" | "alter" | "use" | "other";
/** Whether this statement is syntactically valid */
isValid: boolean;
/** Parse errors for this statement, with line/column relative to the statement content */
errors: SqlParseError[];
}
/**
* Analyzes SQL documents to extract statement boundaries and information
* for use with gutter markers and other SQL-aware features.
*/
export class SqlStructureAnalyzer {
private parser: SqlParser;
private cache = new Map<string, SqlStatement[]>();
private readonly MAX_CACHE_SIZE = 10;
constructor(parser: SqlParser) {
this.parser = parser;
}
/**
* Analyzes the document and extracts all SQL statements
*/
async analyzeDocument(state: EditorState): Promise<SqlStatement[]> {
const content = state.doc.toString();
// Check cache
const cached = this.cache.get(content);
if (cached) {
return cached;
}
const statements = await this.extractStatements(content, state);
this.cache.set(content, statements);
// Keep cache size reasonable
if (this.cache.size > this.MAX_CACHE_SIZE) {
const firstKey = this.cache.keys().next().value;
if (firstKey !== undefined) {
this.cache.delete(firstKey);
}
}
return statements;
}
/**
* Gets the SQL statement at a specific cursor position
*/
async getStatementAtPosition(state: EditorState, position: number): Promise<SqlStatement | null> {
const statements = await this.analyzeDocument(state);
return statements.find((stmt) => position >= stmt.from && position <= stmt.to) || null;
}
/**
* Gets all SQL statements that intersect with a selection range
*/
async getStatementsInRange(
state: EditorState,
from: number,
to: number,
): Promise<SqlStatement[]> {
const statements = await this.analyzeDocument(state);
return statements.filter(
(stmt) => stmt.from <= to && stmt.to >= from, // Statements that overlap with the range
);
}
private async extractStatements(content: string, state: EditorState): Promise<SqlStatement[]> {
const statements: SqlStatement[] = [];
// Split content by semicolons to find potential statement boundaries
const parts = this.splitByStatementSeparators(content);
let currentPosition = 0;
for (const part of parts) {
const trimmedPart = part.trim();
if (trimmedPart.length === 0) {
currentPosition += part.length;
continue;
}
const from = currentPosition + part.indexOf(trimmedPart);
const to = from + trimmedPart.length;
const fromLine = state.doc.lineAt(from);
const toLine = state.doc.lineAt(to);
// Strip comments to detect comment-only parts and determine the type
const strippedContent = this.stripComments(trimmedPart);
// Skip if the statement is empty after stripping comments
if (strippedContent.trim().length === 0 || strippedContent.trim() === ";") {
currentPosition += part.length;
continue;
}
// Parse the original content (comments included) so error positions
// reported by the parser line up with the document
const parseResult = await this.parser.parse(trimmedPart, { state });
const type = this.determineStatementType(strippedContent);
// Remove trailing semicolon from content for cleaner display
const cleanContent = strippedContent.endsWith(";")
? strippedContent.slice(0, -1).trim()
: strippedContent.trim();
statements.push({
from,
to,
lineFrom: fromLine.number,
lineTo: toLine.number,
content: cleanContent,
type,
isValid: parseResult.success,
errors: parseResult.errors ?? [],
});
currentPosition += part.length;
}
return statements;
}
private splitByStatementSeparators(content: string): string[] {
// More sophisticated splitting that handles semicolons in strings and comments
const parts: string[] = [];
let current = "";
let inString = false;
let stringChar = "";
let inSingleLineComment = false;
let inMultiLineComment = false;
let i = 0;
while (i < content.length) {
const char = content[i];
const nextChar = content[i + 1];
// Handle single-line comments (-- comment)
if (!inString && !inMultiLineComment && char === "-" && nextChar === "-") {
inSingleLineComment = true;
current += char + nextChar;
i += 2;
continue;
}
// Handle multi-line comments (/* comment */)
if (!inString && !inSingleLineComment && char === "/" && nextChar === "*") {
inMultiLineComment = true;
current += char + nextChar;
i += 2;
continue;
}
// End multi-line comment
if (inMultiLineComment && char === "*" && nextChar === "/") {
inMultiLineComment = false;
current += char + nextChar;
i += 2;
continue;
}
// End single-line comment on newline
if (inSingleLineComment && (char === "\n" || char === "\r")) {
inSingleLineComment = false;
current += char;
i++;
continue;
}
// Include characters inside comments (for proper position tracking)
if (inSingleLineComment || inMultiLineComment) {
current += char;
i++;
continue;
}
// Handle string literals
if (!inString && (char === "'" || char === '"' || char === "`")) {
inString = true;
stringChar = char;
current += char;
} else if (inString && char === stringChar) {
// Check for escaped quotes
if (nextChar === stringChar) {
current += char + nextChar;
i += 2;
continue;
}
inString = false;
stringChar = "";
current += char;
} else if (!inString && char === ";") {
current += char;
parts.push(current);
current = "";
} else {
current += char;
}
i++;
}
if (current.trim()) {
parts.push(current);
}
return parts;
}
private determineStatementType(sql: string): SqlStatement["type"] {
const trimmed = sql.trim().toLowerCase();
if (trimmed.startsWith("select")) return "select";
if (trimmed.startsWith("insert")) return "insert";
if (trimmed.startsWith("update")) return "update";
if (trimmed.startsWith("delete")) return "delete";
if (trimmed.startsWith("create")) return "create";
if (trimmed.startsWith("drop")) return "drop";
if (trimmed.startsWith("alter")) return "alter";
if (trimmed.startsWith("use")) return "use";
return "other";
}
private stripComments(sql: string): string {
let result = "";
let inString = false;
let stringChar = "";
let inSingleLineComment = false;
let inMultiLineComment = false;
let i = 0;
while (i < sql.length) {
const char = sql[i];
const nextChar = sql[i + 1];
// Handle single-line comments (-- comment)
if (!inString && !inMultiLineComment && char === "-" && nextChar === "-") {
inSingleLineComment = true;
i += 2;
continue;
}
// Handle multi-line comments (/* comment */)
if (!inString && !inSingleLineComment && char === "/" && nextChar === "*") {
inMultiLineComment = true;
i += 2;
continue;
}
// End multi-line comment
if (inMultiLineComment && char === "*" && nextChar === "/") {
inMultiLineComment = false;
i += 2;
continue;
}
// End single-line comment on newline
if (inSingleLineComment && (char === "\n" || char === "\r")) {
inSingleLineComment = false;
result += char;
i++;
continue;
}
// Skip characters inside comments
if (inSingleLineComment || inMultiLineComment) {
i++;
continue;
}
// Handle string literals
if (!inString && (char === "'" || char === '"' || char === "`")) {
inString = true;
stringChar = char;
result += char;
} else if (inString && char === stringChar) {
// Check for escaped quotes
if (nextChar === stringChar) {
result += char + nextChar;
i += 2;
continue;
}
inString = false;
stringChar = "";
result += char;
} else {
result += char;
}
i++;
}
return result;
}
/**
* Clears the internal cache
*/
clearCache(): void {
this.cache.clear();
}
}
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