digitaltwin-core/dist/env/env.js

Minimalist framework to collect and handle data in a Digital Twin project

export class Env {
    static { this.schema = {
        string: (opts) => ({
            type: 'string',
            ...opts
        }),
        number: (opts) => ({
            type: 'number',
            ...opts
        }),
        enum: (values) => ({
            type: 'enum',
            values
        })
    }; }
    static { this.config = {}; }
    static validate(schema, rawEnv = process.env) {
        const config = {};
        for (const [key, rules] of Object.entries(schema)) {
            const value = rawEnv[key];
            if (value === undefined || value === '') {
                if (rules.optional)
                    continue;
                throw new Error(`Missing environment variable: ${key}`);
            }
            switch (rules.type) {
                case 'string':
                    if (rules.format === 'url' && !/^https?:\/\/.+$/.test(value)) {
                        throw new Error(`Invalid URL format for ${key}`);
                    }
                    if (rules.format === 'email' && !/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(value)) {
                        throw new Error(`Invalid email format for ${key}`);
                    }
                    config[key] = value;
                    break;
                case 'number':
                    const parsed = Number(value);
                    if (isNaN(parsed)) {
                        throw new Error(`Invalid number format for ${key}`);
                    }
                    config[key] = parsed;
                    break;
                case 'enum':
                    if (!rules.values.includes(value)) {
                        throw new Error(`Invalid value for ${key}, expected one of ${rules.values.join(', ')}`);
                    }
                    config[key] = value;
                    break;
            }
        }
        this.config = config;
        return config;
    }
}
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