Improved Interface Generator

[Niels-Be]

This will add an interface generator for client interfaces.
It is similar to the existing generator but with several improvements.

1. It lets you generate an interface directly from a dbus object
2. Has more Handlebar functions
3. Customizable templates
4. Example templates for:

• A client interface wrapper (TS and JS)
• Typescript client interface definitions
• Service class stub (JS only, like in original generator)

Let me know if you want this in this project, otherwise I would create an separate project for this generator.

Usage:

Usage: generate-client-interfaces [options] <destination> <objectPath>

Generate an interface from a DBus object

Options:
  -V, --version          output the version number
  --system               Use the system bus
  --session              Use the session bus
  -t, --template [path]  Template to use for interface generation
  --full                 Do not exclude DBus standard interfaces
  -p, --prefix           Prefix class names with full interface path
  -o, --output [path]    The output file path (default: stdout)
  -h, --help             output usage information

Example:
Generate a Typescript class that wraps all DBus calls into a high level interface.

./generate-client-interfaces.js --system -t ../templates/typescript-class.hbs org.bluez /org/bluez/hci0

import * as DBus from 'dbus-next';
import { EventEmitter } from 'events';

/*
 * Generated by dbus-next interface generator
 */

/**
 * org.bluez.Adapter1
 */
export class Adapter1 extends EventEmitter {

    public readonly dbusInterfaceName = 'org.bluez.Adapter1';
    public dbusObject: DBus.ProxyObject;
    public propertiesDBusInterface: DBus.ClientInterface;
    public thisDBusInterface: DBus.ClientInterface;

    constructor(dbusObject: DBus.ProxyObject) {
        super();
        this.dbusObject = dbusObject;
        this.thisDBusInterface = dbusObject.getInterface('org.bluez.Adapter1');
        this.propertiesDBusInterface = dbusObject.getInterface('org.freedesktop.DBus.Properties');

        // forward property change events
        this.propertiesDBusInterface.on('PropertiesChanged', (iface: string, changed: any, invalidated: any) => {
            if(iface === this.dbusInterfaceName) {
                this.emit('PropertiesChanged', iface, changed, invalidated);
            }
        });
        // forward all signals
        this.on("newListener", this.thisDBusInterface.on.bind(this.thisDBusInterface));
        this.on("removeListener", this.thisDBusInterface.removeListener.bind(this.thisDBusInterface));
    }

    /***** Properties *****/

    public getProperties(): Promise<{[name: string]: DBus.Variant}> {
        return this.propertiesDBusInterface.GetAll(this.dbusInterfaceName);
    }

    public getProperty(name: string): Promise<DBus.Variant> {
        return this.propertiesDBusInterface.Get(this.dbusInterfaceName, name);
    }

    public setProperty(name: string, value: DBus.Variant): Promise<void> {
        return this.propertiesDBusInterface.Set(this.dbusInterfaceName, name, value);
    }

    //@property({ name: 'Address', signature: 's', access: ACCESS_READ })
    public Address(): Promise<string> {
        return this.propertiesDBusInterface.Get(this.dbusInterfaceName, 'Address');
    }

    //@property({ name: 'AddressType', signature: 's', access: ACCESS_READ })
    public AddressType(): Promise<string> {
        return this.propertiesDBusInterface.Get(this.dbusInterfaceName, 'AddressType');
    }

    //@property({ name: 'Name', signature: 's', access: ACCESS_READ })
    public Name(): Promise<string> {
        return this.propertiesDBusInterface.Get(this.dbusInterfaceName, 'Name');
    }

    //@property({ name: 'Alias', signature: 's', access: ACCESS_READWRITE })
    public Alias(): Promise<string>;
    public Alias(value: string): Promise<void>;
    public Alias(value?: string): Promise<any> {
        if(value !== undefined) {
            return this.propertiesDBusInterface.Set(this.dbusInterfaceName, 'Alias', value);
        } else {
            return this.propertiesDBusInterface.Get(this.dbusInterfaceName, 'Alias');
        }
    }

    //@property({ name: 'Class', signature: 'u', access: ACCESS_READ })
    public Class(): Promise<number> {
        return this.propertiesDBusInterface.Get(this.dbusInterfaceName, 'Class');
    }

    //@property({ name: 'Powered', signature: 'b', access: ACCESS_READWRITE })
    public Powered(): Promise<boolean>;
    public Powered(value: boolean): Promise<void>;
    public Powered(value?: boolean): Promise<any> {
        if(value !== undefined) {
            return this.propertiesDBusInterface.Set(this.dbusInterfaceName, 'Powered', value);
        } else {
            return this.propertiesDBusInterface.Get(this.dbusInterfaceName, 'Powered');
        }
    }

    //@property({ name: 'Discoverable', signature: 'b', access: ACCESS_READWRITE })
    public Discoverable(): Promise<boolean>;
    public Discoverable(value: boolean): Promise<void>;
    public Discoverable(value?: boolean): Promise<any> {
        if(value !== undefined) {
            return this.propertiesDBusInterface.Set(this.dbusInterfaceName, 'Discoverable', value);
        } else {
            return this.propertiesDBusInterface.Get(this.dbusInterfaceName, 'Discoverable');
        }
    }

    //@property({ name: 'DiscoverableTimeout', signature: 'u', access: ACCESS_READWRITE })
    public DiscoverableTimeout(): Promise<number>;
    public DiscoverableTimeout(value: number): Promise<void>;
    public DiscoverableTimeout(value?: number): Promise<any> {
        if(value !== undefined) {
            return this.propertiesDBusInterface.Set(this.dbusInterfaceName, 'DiscoverableTimeout', value);
        } else {
            return this.propertiesDBusInterface.Get(this.dbusInterfaceName, 'DiscoverableTimeout');
        }
    }

    //@property({ name: 'Pairable', signature: 'b', access: ACCESS_READWRITE })
    public Pairable(): Promise<boolean>;
    public Pairable(value: boolean): Promise<void>;
    public Pairable(value?: boolean): Promise<any> {
        if(value !== undefined) {
            return this.propertiesDBusInterface.Set(this.dbusInterfaceName, 'Pairable', value);
        } else {
            return this.propertiesDBusInterface.Get(this.dbusInterfaceName, 'Pairable');
        }
    }

    //@property({ name: 'PairableTimeout', signature: 'u', access: ACCESS_READWRITE })
    public PairableTimeout(): Promise<number>;
    public PairableTimeout(value: number): Promise<void>;
    public PairableTimeout(value?: number): Promise<any> {
        if(value !== undefined) {
            return this.propertiesDBusInterface.Set(this.dbusInterfaceName, 'PairableTimeout', value);
        } else {
            return this.propertiesDBusInterface.Get(this.dbusInterfaceName, 'PairableTimeout');
        }
    }

    //@property({ name: 'Discovering', signature: 'b', access: ACCESS_READ })
    public Discovering(): Promise<boolean> {
        return this.propertiesDBusInterface.Get(this.dbusInterfaceName, 'Discovering');
    }

    //@property({ name: 'UUIDs', signature: 'as', access: ACCESS_READ })
    public UUIDs(): Promise<Array<string>> {
        return this.propertiesDBusInterface.Get(this.dbusInterfaceName, 'UUIDs');
    }

    //@property({ name: 'Modalias', signature: 's', access: ACCESS_READ })
    public Modalias(): Promise<string> {
        return this.propertiesDBusInterface.Get(this.dbusInterfaceName, 'Modalias');
    }


    /***** Methods *****/

    //@method({ name: 'StartDiscovery', inSignature: '', outSignature: '' })
    public StartDiscovery(): Promise<void> {
        return this.thisDBusInterface.StartDiscovery();
    }

    //@method({ name: 'SetDiscoveryFilter', inSignature: 'a{sv}', outSignature: '' })
    public SetDiscoveryFilter(properties: {[key: string]: DBus.Variant}): Promise<void> {
        return this.thisDBusInterface.SetDiscoveryFilter(properties);
    }

    //@method({ name: 'StopDiscovery', inSignature: '', outSignature: '' })
    public StopDiscovery(): Promise<void> {
        return this.thisDBusInterface.StopDiscovery();
    }

    //@method({ name: 'RemoveDevice', inSignature: 'o', outSignature: '' })
    public RemoveDevice(device: DBus.ObjectPath): Promise<void> {
        return this.thisDBusInterface.RemoveDevice(device);
    }

    //@method({ name: 'GetDiscoveryFilters', inSignature: '', outSignature: 'as' })
    public GetDiscoveryFilters(): Promise<Array<string>> {
        return this.thisDBusInterface.GetDiscoveryFilters();
    }

}


/* [....] */

[acrisci]

The JavaScript version makes a service interface and the TypeScript version makes a client interface. That should be explicit somewhere, probably in the name of the template.

[Niels-Be]

The JavaScript version makes a service interface and the TypeScript version makes a client interface. That should be explicit somewhere, probably in the name of the template.

Right it should only generate client interfaces.
Is there any use case for generating interfaces for a service?

[acrisci]

Is there any use case for generating interfaces for a service?

Yeah, this was written to generate the boilerplate for mpris-service. It's more useful for clients, but it can easily do both because they use the same kinds of abstractions.

[Niels-Be]

I did some updates and also added a recursive option to generate classes for an entire service at once. Each interface will be generated into its own file.

See node-dbus-network-manager for an example of a fully generated project.

[acrisci]

👍