amcgee/remjs

var _ = require('lodash');

var REMOptions = function( resource, options, parent ) {
    this.resource = resource;
    this.datasource = options.datasource || resource.name;

    if ( parent ) {
        options = this.inherit( parent, options );
    }
    this.id_key                 = options.id_key || '_id';
    this.private                = options.private || false;
    this.filter                 = options.filter || {};
    this.defaults             = options.defaults || {};
    this.immutable_keys = options.immutable_keys || {};
    this.children             = options.children || {};
    this.permissions        = options.permissions;
    if (_.isArray(options.children)) {
        this.children = _.reduce(options.children, function(result, child) {
            result[child] = { name: child };
            return result;
        }, {});
    }
    this.forbid = options.forbid || [];
    this.type = options.type || 'resource';
};

REMOptions.prototype.inherit = function( parent, options ) {
    options.filter = options.filter || {};
    options.filter[parent.options.makeForeignKey(parent.name)] = function(resource, req) {
        return req.rem.bound_id[parent.name];
    }.bind(this);
    options.defaults = options.defaults || {};
    options.defaults[parent.options.makeForeignKey(parent.name)] = function(resource, req) {
        return req.rem.bound_id[parent.name];
    }.bind(this);

    options.immutable_keys = options.immutable_keys || [];
    options.immutable_keys.push( parent.options.makeForeignKey(parent.name) );
    return options;
};

REMOptions.prototype.buildQuery = function( req ) {
    var query = {};
    var resource = this.resource;
    _.forEach( this.filter, function( v, i ) {
        if ( _.isFunction(v) ) {
            query[i] = v(resource,req);
        } else {
            query[i] = v;
        }
    } );
    if ( req.rem.permission_filter ) {
        query = { $and: [ query, req.rem.permission_filter ] };
    }
    return query;
};
REMOptions.prototype.buildDefaults = function(req) {
    var obj = {};
    var resource = this.resource;
    _.forEach( this.defaults, function( v, i ) {
        if ( _.isFunction(v) ) {
            obj[i] = v(resource,req);
        } else {
            obj[i] = v;
        }
    } );
    return obj;
};
REMOptions.prototype.checkImmutableKeys = function() {

};
REMOptions.prototype.makeForeignKey = function(target) {
    return target + "_id";
};

module.exports = REMOptions;