Method getPageNumFromUrl

Pagetual/pagetual.user.js:6678–6711

(url, defaultPage)

        }

        getPageNumFromUrl(url, defaultPage) {
            if (!url) return defaultPage;
            if (this.curSiteRule.pageNum) {
                let result = this.curSiteRule.pageNum;
                let strMatch = result.match(/\{.*?}/);
                if (!strMatch) return defaultPage;
                let urlReg = new RegExp(".*" + result.replace(strMatch[0], "(\\d+)") + ".*", "i");
                let curShowNum = url.replace(urlReg, "$1");
                if (curShowNum !== url) {
                    let code = strMatch[0].replace(/^{/, "").replace(/}$/, "");
                    if (code === "$p") {
                        return curShowNum;
                    } else {
                        try {
                            let page1 = parseInt(Function('"use strict";return ' + code.replace("$p", "0"))());
                            let page2 = parseInt(Function('"use strict";return ' + code.replace("$p", "1"))());
                            let numGap = page2 - page1;
                            let _page = (parseInt(curShowNum) - page1) / numGap;
                            if (_page && _page % 1 === 0) return _page;
                            else {
                                this.curSiteRule.pageNum = null;
                                return defaultPage;
                            }
                        } catch(e) {
                            debug(e);
                        }
                    }
                } else {
                    return defaultPage;
                }
            }
            let pageNum = url.replace(/.*[&\/\?](p=|page[=\/_-]?)(\d+).*/i, "$2");
            return pageNum === url ? defaultPage : (pageNum.length > 4 ? defaultPage : pageNum);
        }

        reachedLastPage() {
            if (rulesData.lastPageTips) {