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Filter Manger

Reviewers:

• Aviv B

Created in order to provide a uniform way to preform and mange your application validations and fillers.

• Validations can be saved in a File/In-memory/DB
• All Validations must maintain the IRawFilter interface ( { [Filter Name]: [Rules] } )
• This package can be wrap as a npm package and can be used both in the client (js/angular/react/etc..) and on a node server
• Client: you will probably want to get the filters "Raw data" from the server/instantiate the filters in-memory
• Server: You can load the filters from files (have access to the fs) / fetch it from the DB

! Mange the filters in the server Fetch the filters using a request to BE and Use the package in both to instantiate the filters

Dev

• to wrap as a npm package use npm run build (don't forget to bump if needed)
• to run in "dev" mode with file watch use npm run dev
• to re-build the docs run npm run doc
• "main" folder containing the transpiled files
• development is done on files in/src/lib
• some example filters can be found in /src/lib/assets/filters

// Loading the filters from a *.json file 
const path = __dirname + '/lib/assets/'
let filleName = 'filters.json'
let data: any = readFileSync(path + filleName)
data = JSON.parse(data.toString())
// Instantiating the FilterManger
const FM: FilterManger = new FilterManger(data);
// Listing the filters name
console.log('Listing the filters name: getFiltersList() ', FM.getFiltersList());
// In-memory filter, ready to be used
const numbersOnly = FM.getFilterByName('numbersOnly')
const includesNumbers = FM.getFilterByName('includesNumbers')

// Validating different inputs against the  
console.log('numbersOnly');
console.log(numbersOnly?.isValid("2")); // true  
console.log(numbersOnly?.isValid("2Be")); // false
console.log(numbersOnly?.isValid("0rN0t "));// false
console.log('includesNumbers');
console.log(includesNumbers?.isValid('abc'));
console.log(includesNumbers?.isValid('abc5'));

// Add new filter (In-memory) 
FM.addFilter('hostName', ["^(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-ֿֿֿֿֿֿ_]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-_]*[A-Za-z0-9])$"])
console.log('hostName is now available: getFiltersList() ', FM.getFiltersList());
const hostName = FM.getFilterByName('hostName')
console.log('hostName');
console.log(hostName?.isValid('b.com')); // true 
console.log(hostName?.isValid('b.%com')); // false

// Remove filter 
console.log("Remove 'hostName' filter ");
console.log(FM.removeFilter('hostName')); // true 
console.log(FM.removeFilter('hostName')); // false -> What was removed can be removed

// Getting the most updated filter's list in a (stringify) json format
console.log("Getting the most updated filter's list in a (stringify) json format ", FM.stringify());
// Updating / Creating filters file
// writeFileSync(path + 'filtersV2.json', FM.stringify(), 'utf-8');

// Revert
console.log("Restore the filters to their original sate (in-memory) ");
FM.addFilter('isTeddy', ["/bear/gm"])
console.log('Adding "isTeddy" filter', FM.getFiltersList());
FM.addFilter('isWienreb', ["/Wienreb/gm"])
console.log('Adding "isWienreb" filter', FM.getFiltersList());
FM.revert()
console.log('After revert() ', FM.getFiltersList());