Route generator sederhana

simple-route.js

class StrategyBase {
    next() {
        return { type: "next" };
    }
    exit(result) {
        return { type: "exit", result: result };
    }
}
class DefaultStrategy extends StrategyBase {
    transform(meta) {
        return this.exit(`GET /${meta.controller}/${meta.action}`);
    }
}
class DecoratedStrategy extends StrategyBase {
    transform(meta) {
        if (meta.decorator) {
            return this.exit(meta.decorator);
        }
        return this.next();
    }
}
class ConventionStrategy extends StrategyBase {
    transform(meta) {
        switch (meta.action) {
            case "add":
                return this.exit(`POST /${meta.controller}`);
            case "modify":
                return this.exit(`PATCH /${meta.controller}/:id`);
            default:
                return this.next();
        }
    }
}
class Generator {
    constructor() {
        this.transformers = [
            new DecoratedStrategy(),
            new ConventionStrategy(),
            new DefaultStrategy()
        ];
    }
    generate(meta) {
        for (let x of this.transformers) {
            let result = x.transform(meta);
            if (result.type == "exit")
                return result.result;
        }
    }
}
let generator = new Generator();
console.log(generator.generate({ controller: "user", action: "list" }));
console.log(generator.generate({ controller: "user", action: "add" }));
console.log(generator.generate({ controller: "user", action: "list", decorator: "GET /hello/world" }));