Function parseInputContext

src/utils/bash/shellCompletion.ts:80–137

* Parse input to extract completion context

(input: string, cursorOffset: number)

 * Parse input to extract completion context
 */
function parseInputContext(input: string, cursorOffset: number): InputContext {
  const beforeCursor = input.slice(0, cursorOffset)

  // Check if it's a variable prefix, before expanding with shell-quote
  const varMatch = beforeCursor.match(/\$[a-zA-Z_][a-zA-Z0-9_]*$/)
  if (varMatch) {
    return { prefix: varMatch[0], completionType: 'variable' }
  }

  // Parse with shell-quote
  const parseResult = tryParseShellCommand(beforeCursor)
  if (!parseResult.success) {
    // Fallback to simple parsing
    const tokens = beforeCursor.split(/\s+/)
    const prefix = tokens[tokens.length - 1] || ''
    const isFirstToken = tokens.length === 1 && !beforeCursor.includes(' ')
    const completionType = isFirstToken
      ? 'command'
      : getCompletionTypeFromPrefix(prefix)
    return { prefix, completionType }
  }

  // Extract current token
  const lastToken = findLastStringToken(parseResult.tokens)
  if (!lastToken) {
    // No string token found - check if after operator
    const lastParsedToken = parseResult.tokens[parseResult.tokens.length - 1]
    const completionType =
      lastParsedToken && isCommandOperator(lastParsedToken)
        ? 'command'
        : 'command' // Default to command at start
    return { prefix: '', completionType }
  }

  // If there's a trailing space, the user is starting a new argument
  if (beforeCursor.endsWith(' ')) {
    // After first token (command) with space = file argument expected
    return { prefix: '', completionType: 'file' }
  }

  // Determine completion type from context
  const baseType = getCompletionTypeFromPrefix(lastToken.token)

  // If it's clearly a file or variable based on prefix, use that type
  if (baseType === 'variable' || baseType === 'file') {
    return { prefix: lastToken.token, completionType: baseType }
  }

  // For command-like tokens, check context: are we starting a new command?
  const completionType = isNewCommandContext(
    parseResult.tokens,
    lastToken.index,
  )
    ? 'command'
    : 'file' // Not after operator = file argument

  return { prefix: lastToken.token, completionType }
}