trader-server/node_modules/odata-v4-literal/src/index.ts

OData server for testing strategies, simulating and real trading.

function integer(value:string):number {
    return +value;
}

function float(value:string):number {
    switch (value){
        case 'INF': return Infinity;
        case '-INF': return -Infinity;
        default: return +value;
    }
}

export class Literal{
    constructor(type:string, value:string){
        let result = (this[type] || (_ => _))(value);
        this.valueOf = () => result;
    }
    static convert(type:string, value:string):any {
        return (new Literal(type, value)).valueOf(); 
    }
    'Edm.String'(value:string){ return decodeURIComponent(value).slice(1, -1).replace(/''/g, "'"); }
    'Edm.Byte'(value:string){ return integer(value); }
    'Edm.SByte'(value:string){ return integer(value); }
    'Edm.Int16'(value:string){ return integer(value); }
    'Edm.Int32'(value:string){ return integer(value); }
    'Edm.Int64'(value:string){ return integer(value); }
    'Edm.Decimal'(value:string){ return float(value); }
    'Edm.Double'(value:string){ return float(value); }
    'Edm.Single'(value:string){ return float(value); }
    'Edm.Boolean'(value:string){
        value = value || '';
        switch (value.toLowerCase()){
            case 'true': return true;
            case 'false': return false;
            default: return undefined;
        }
    }
    'Edm.Guid'(value:string){ return decodeURIComponent(value); }
    'Edm.Date'(value:string){ return value; }
    'Edm.DateTimeOffset'(value:string){ return new Date(value); }
    'null'(value:string){ return null; }
    'Edm.TimeOfDay'(value:string){ return new Date(`1970-01-01T${value}Z`); }
    'Edm.Duration'(value:string){
        var m = value.match(/P([0-9]*D)?T?([0-9]{1,2}H)?([0-9]{1,2}M)?([\.0-9]*S)?/);
        if (m){
            var d = new Date(0);
            for (var i = 1; i < m.length; i++){
                switch (m[i].slice(-1)){
                    case 'D': d.setDate(parseInt(m[i])); continue;
                    case 'H': d.setHours(parseInt(m[i])); continue;
                    case 'M': d.setMinutes(parseInt(m[i])); continue;
                    case 'S': d.setSeconds(parseFloat(m[i])); continue;
                }
            }

            return d.getTime();
        }
        throw new Error('Invalid Duration');
    }
}