extract_multiple method

Future<Online> extract_multiple(Map<String, Map<String, dynamic>> extractions)

Extracts multiple data points from the page and stores them in the context.

extractions is a map where keys are names for the data points and values are maps containing:

• 'selector': AbstractSelector to find elements
• 'attribute' (optional): attribute to extract instead of text content

Returns the Online instance for method chaining.

Example usage:

await online.extract_multiple({
  'title': {'selector': Css('h1')},
  'description': {'selector': Css('meta[name="description"]'), 'attribute': 'content'},
  'price': {'selector': Css('.product-price'), 'attribute': 'data-price'}
});
var title = ctx.get<List<String>>('title');
var description = ctx.get<List<String>>('description');
var price = ctx.get<List<String>>('price');

Implementation

Future<Online> extract_multiple(
    Map<String, Map<String, dynamic>> extractions) async {
  Show.action('extracting', 'multiple data points');
  for (var entry in extractions.entries) {
    var selector = entry.value['selector'] as AbstractSelector;
    var attribute = entry.value['attribute'] as String?;
    await extract_text(selector, entry.key, attribute: attribute);
  }
  return this;
}