How to Build a WeChat Assist Module with Laravel: From Auth to Security

Introduction

The article starts by questioning whether readers have played popular WeChat games like bargaining or assistance, then argues that a competent programmer should stay curious about new internet features and help friends by participating in such activities.

1. WeChat Authentication and Share Customization

WeChat authentication is performed via the WeChat API to obtain the user's openid and accesstoken. Different scope values ( snsapi_base for silent login and userinfo for user consent) determine whether a permission dialog appears.

For sharing, the jweixin-1.0.0.js</script> library is used. In Laravel Blade templates a dedicated section is defined to inject share data (title, description, image URL, link, timeline title) into the page.

@section()
include 'shencom.wxjs'
@show

2. Activity Information Management

Activity metadata (title, description, start/end times, rules, etc.) should be stored in a database table (e.g., activity). Configuration files can be used, but a database offers better compatibility.

The Laravel timezone must be set correctly (e.g., 'timezone' => 'PRC') to handle activity states such as "not started", "ongoing", and "ended".

public function index()
{
    $isIn = $this->isInActivity();
    if ($isIn == 2 || $isIn == 4) {
        return view('activity.test.preview');
    } elseif ($isIn == 3) {
        return view('activity.test.over');
    }
    return view('activity.test.main');
}

3. Implementing Activity Rules

Assist values can be fixed, random, or proportional. A JSON object maps values to their probabilities, e.g.: {"value1":ratio1, "value2":ratio2, "valueN":ratioN} The sum of ratios should ideally be 100, but the system normalizes them automatically. A helper class can generate assist values based on these ratios.

4. Assist Relationship Tracking

A support table records each assist interaction:

support: id, act_id, sponsor, supporter, create_at, create_ip, update_at, support_value

Additional fields like memo can be added if needed.

5. Assist Eligibility Rules

Eligibility checks determine whether a user can continue assisting, based on limits such as maximum assists per day or total assists. Configurable parameters (e.g., Max_Support_Cnt = 5) should be stored in a configuration table.

6. Interactive Information Presentation

Key interactive displays include:

Leaderboard showing users with the highest assist counts or values.

Love list (friend assist list) showing who helped whom.

Example SQL for ranking:

select a.*, b.openid, b.nickname, b.headimgurl, @rownum:=@rownum+1 as ranking
from cf_task_sponsor a
left join usr_userinfo b on a.sponsor = b.id
join (select @rownum:=0) r
order by a.support_value desc, a.last_updatetime asc
limit 100

7. Security Considerations

Beyond robust code, additional security layers are required:

IP restrictions: limit the number of assists per IP and block ranges using an com_iprange table.

Blacklist: store malicious OpenIDs, user IDs, or IPs in a blacklist table and reject their requests.

Cross‑origin validation and CSRF tokens for Laravel AJAX posts.

CAPTCHA verification stored in session for each page load.

Database transactions to ensure consistency during assist operations.