route match

route_match.js

function check_item(rule, url, params) {
    var pos_s = rule.indexOf('{')
    var pos_e = rule.indexOf('}')
    if (pos_s >= 0 && pos_e) {
        var r_after = rule.slice(0, pos_s)
        var key = rule.slice(pos_s + 1, pos_e)
        var r_be = rule.slice(pos_e + 1, rule.length)
        var pos_2 = url.lastIndexOf(r_be)
        var u_after = url.slice(0, pos_s)
        var value = url.slice(pos_s, pos_2)
        var u_be = url.slice(pos_2, url.length)
        if (r_after === u_after && r_be === u_be) {
            params[key] = value
            return true
        } else {
            return false
        }
    } else 
        return rule.toLowerCase() === url.toLowerCase()
    }
}
function getParamsByRouter(url, rules) {
    let url_items = url.split('/')
    for (let index = 0, length = rules.length; index < length; index++) {
        let rule = rules[index]
        let flag = true, params = {}
        
        let rule_items = rule.split('/')
        if (url_items.length != rule_items.length) continue
        for (var i = 1; i < rule_items.length; i++) {
            if (!check_item(rule_items[i], url_items[i], params)) {
                flag = false
                break
            }
        }
        if (flag) {
            return params
        }
    }
    throw new Error('URL CANNOT MATCH ROUTE MAP')
}

route_match.ts

enum Method {
    GET = 1,
    POST = 2,
    PUT = 4,
    DELETE = 8,
    OPTIONS = 16,
    HEAD = 32,
}
interface Rule {
    route: string
    method: number
}
type Params = {[key: string]: string}

function check_item(rule: string, url: string, params: any): boolean {
    var pos_s = rule.indexOf('{')
    var pos_e = rule.indexOf('}')
    if (pos_s >= 0 && pos_e) {
        var r_after = rule.slice(0, pos_s)
        var key = rule.slice(pos_s + 2, pos_e)
        var r_be = rule.slice(pos_e + 1, rule.length)
        var pos_2 = url.lastIndexOf(r_be)
        var u_after = url.slice(0, pos_s)
        var value = url.slice(pos_s, pos_2)
        var u_be = url.slice(pos_2, url.length)
        if (r_after === u_after && r_be === u_be) {
            params[key] = value
            return true
        } else {
            return false
        }
    } else 
        return rule.toLowerCase() === url.toLowerCase()
    }
}
export function getParamsByRouter(url: string, method: Method, rules: Rule[]): [Method, Params] {
    let url_items = url.split('/')
    for (let index = 0, length = rules.length; index < length; index++) {
        let rule = rules[index]
        if (!(method & rule.method)) {
            continue
        }
        let flag = true, params: Params = {}
        
        let rule_items = rule.route.split('/')
        if (url_items.length != rule_items.length) continue
        for (var i = 1; i < rule_items.length; i++) {
            if (!check_item(rule_items[i], url_items[i], params)) {
                flag = false
                break
            }
        }
        if (flag) {
            return [method, params]
        }
    }
    throw new Error('URL CANNOT MATCH ROUTE MAP')
}