Language

use Risan\Sentiment\Language;

enum Language: string selects the lexicon and rules used for an analysis.

Cases

Where it is accepted

Sentiment::analyze() and the Analyzer constructor take Language|string, so you can pass either the enum case or its code. English is the default.

use Risan\Sentiment\Analyzer;
use Risan\Sentiment\Language;
use Risan\Sentiment\Sentiment;

Sentiment::analyze('Filmnya bagus banget!', Language::Indonesian);
Sentiment::analyze('Filmnya bagus banget!', 'id');

(new Analyzer('id'))->language(); // Language::Indonesian

Usage

Being a backed enum, Language has the native methods:

Language::from('id');       // Language::Indonesian
Language::tryFrom('fr');    // null
Language::English->value;   // 'en'
Language::cases();          // [English, Indonesian]

An unknown code throws PHP’s native ValueError, from Language::from() as well as from Sentiment::analyze() and new Analyzer():

Language::from('fr');                 // throws ValueError
Sentiment::analyze('Bonjour', 'fr');  // throws ValueError

See Languages for how each language is scored.