search-filter-options

Incremental tokenizer

Purpose

UX of project requires filter with large amount of fields (20-30), e.g. email, provider, status etc. with any combinations of theese fields.

Solution - make search string filter which transform string like :provider stripe :status pending into object like

{
    provider: 'stripe',
    status: 'pending'
}

Description

Create instance of parser and parse

Browser

var sfo = new SearchFilterOptions();
...
sfo.parse(' :provider stripe  :status  pending ');

constructor

SearchFilterOptions({ sigil = ':', keys = [], trim = true } = {})

where

• sigil - char that starts key word, default is :
• keys - array of expected keyword objects { name: 'name of key', flag: 'optional, true if this variable is a flag'}
• trim - to trim keys and values, default true

return object

{
    data: {     //all found keys
        key: {
            value: 'string'
        }
    },
    expected: { //all expected keywords that matches `keys` argument in constructor
        key: {
            value: string,
            exists: boolean,
            flag: boolean
        }
    },
    extra: string //everything before first keyword
}

parsing

parse(string) - return result object. Parser saves previous state, and if next string differs by one letter, then restore previous state and increment data

Examples

see test file on github.com