# All files / router/src helpers.ts

97.82% Statements 90/92
93.54% Branches 29/31
100% Functions 10/10
97.82% Lines 90/92

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    1ximport type {
        NavigationResult,
        NavigationState,
        NavigationHistoryEntry,
        QueryParams
    } from '#src/types';

    // Utility functions
    const generateRandomId = () => Math.random().toString(36).substring(2, 9);

    export const getHash = (url: string): string => {
        const urlObject = new URL(url);

        return urlObject.hash.slice(1).replace('/', '') || '/';
    };

    export const createHash = (hash: string) => `/${hash}`;

    export const createHistoryEntry = (
        url: string,
        state: NavigationState = {},
        index: number = 0
    ): NavigationHistoryEntry => {
        return {
            url,
            key         : generateRandomId(),
            id          : generateRandomId(),
            index,
            sameDocument: true,
            state,
            hash        : getHash(url),
        };
    };

    export const createNavigationResult = (destination: NavigationHistoryEntry): NavigationResult => {
        let commitResolve: (value: NavigationHistoryEntry) => void;
        let finishResolve: (value: NavigationHistoryEntry) => void;

        const committed = new Promise<NavigationHistoryEntry>((resolve) => {
            commitResolve = resolve;
        });

        const finished = new Promise<NavigationHistoryEntry>((resolve) => {
            finishResolve = resolve;
        });

        // Use setTimeout to simulate the async nature of navigation
        setTimeout(() => commitResolve(destination), 0);
        setTimeout(() => finishResolve(destination), 10);

        return { committed, finished, };
    };

    export const isRouteMatch = (pattern: string, hash: string) => {
        // Handle null or undefined hash
        if(hash === null || hash === undefined) {
            return false;
        }

        // Split the pattern and URL into segments to ensure they have the same length
        const patternSegments = pattern.split('/');
        const hashSegments = hash.split('/');

        // If the segments don't match in length, return false
        if(patternSegments.length !== hashSegments.length) {
            return false;
        }

        // Replace route parameters with a regex pattern that matches any characters
        const patternRegex = pattern.replace(/:\w+/g, '([^/]+)');

        // Create a regular expression for matching the URL
        const regex = new RegExp(`^${patternRegex}$`);

        // Check if the hash matches the pattern
        return regex.test(hash);
    };

    export const getRouteMap = (routeNames: string[]) => {
        return routeNames.reduce((acc, name) => {
            acc[name] = name;
            return acc;
        }, {} as Record<string, string>);
    };

    export const getRouteItem = <T>(map: Record<string, T>, hash: string) => {
        let route: T | undefined;

        return Object.keys(map).reduce((acc, key) => {
            if(isRouteMatch(key, hash)) {
                acc = map[key];
            }
            return acc;
        }, route);
    };

    export const getParamsFromUrl = (pattern: string, hash: string): Record<string, string> => {
        const params: Record<string, string> = {};

        // Split the pattern and URL into segments
        const patternSegments = pattern.split('/');
        const urlSegments = hash.split('/');

        // If the segments don't match in length, return empty params
        if(patternSegments.length !== urlSegments.length) {
            return params;
        }

        // Iterate through the pattern segments
        for(let i = 0; i < patternSegments.length; i++) {
            const patternSegment = patternSegments[i];

            // Check if the segment is a parameter (starts with ':')
            if(patternSegment.startsWith(':')) {
                // Extract the parameter name (remove the ':')
                const paramName = patternSegment.substring(1);
                // Get the corresponding value from the URL
                const paramValue = urlSegments[i];

                // Add to the params object
                params[paramName] = paramValue;
            }
        }

        return params;
    };

    export const parseQueryParams = <T extends QueryParams = QueryParams>(urlPart: string): T => {
        const queryString = urlPart.split('?')[1];

        if(!queryString) {
            return {} as T;
        }

        const params = queryString.split('&');
        const queryParams: { [key: string]: string } = {};

        params.forEach((param) => {
            const [key, value] = param.split('=');

            queryParams[key] = value ? decodeURIComponent(value) : '';
        });

        return queryParams as T;
    };