package vato007:ingey;

world dynamic {
    resource row {
        get: func(name: string) -> string;
    }

    resource reader {
        columns: func() -> list<string>;

        next: func() -> row;
        has-next: func() -> bool;

        // Get a row by values in one or more columns
        query: func(values: list<tuple<string, string>>) -> row;
    }

    resource read-map {
        get: func(key: string) -> string;
    }

    resource write-map {
        add: func(name: string, value: string);
    }

    resource readers {
        get-reader: func(name: string) -> option<reader>;
    }

    resource writer {
        write: func(row: write-map);
    }

    export evaluate: func(readers: readers, properties: read-map, writer: writer);
}