[Good First Issues]: implement function "check_custom_values" - 7 points

[Michaelg22]

Motivation

Vanus Functions are a series of pre-built functions worked within Vanus transformer. By choosing a function, users can specify the way that events will be changed.

It will be a good start if you decide to contribute to Vanus codes.

Details

Function name: check_custom_values

Args

• sourceJsonPath - The name of an existing column.
• customValue - Custom value to check
• targetJsonPath The name of the new column to be created.
• trueFlagReplacement - custom string if value equal custom value
• falseFlagReplacement - Custom string if value doesn't equal custom value

Description

The function is used to check if the source JSON path contains the customValue or not. If it contains that value, the trueFlagReplacement will be assigned to the target JSON path. If it doesn't, the falseFlagReplacement will be assigned to the target JSON path.

Example

{
    "specversion" : "1.0",
    "type" : "com.example.someevent",
    "source" : "/mycontext",
    "subject": null,
    "id" : "C234-1234-1234",
    "time" : "2018-04-05T17:31:00Z",
    "comexampleextension1" : "value",
    "comexampleothervalue" : 5,
    "datacontenttype" : "application/json",
    "data" : {
        "appinfoA" : "",
       

    }
}

After the function "check_custom_values":

"pipeline":[
    {"command":["extract_custom_values","$.data.appinfoA", "$.data.appinfoC", "The element has content.", "The element is empty"]}
]

The transformed event should look like this:

{
    "specversion" : "1.0",
    "type" : "com.example.someevent",
    "source" : "/mycontext",
    "subject": null,
    "id" : "C234-1234-1234",
    "time" : "2018-04-05T17:31:00Z",
    "comexampleextension1" : "value",
    "comexampleothervalue" : 5,
    "datacontenttype" : "application/json",
    "data" : {
        "appinfoA" : "",
        "appinfoC" : "The element is empty"

How to implement

1. Fork the vanus repository.
2. Create a branch function-check_custom_values
3. Create check_custom_values.go under internal/primitive/transform/action/strings, and then implement the function.
4. Create check_custom_values .go under internal/primitive/transform/action/strings for unit test.
5. Register your function in internal/primitive/transform/runtime/init.go.
6. Submit your PR

Contribution points

Each issue counts specific points based on its difficulty. Contributors earn the corresponding points if they solve that issue. Contribution points are used to describe the contributions contributors have made. They can also be used to get rewards when there are community events.

This issue counts 7 points.

How to claim to solve the issue

If you want to implement this function, please leave a comment in this issue like:

I'd like to implement this function, please assign this issue to me.

Vanus community will assign the issue to you on time.

[dhanusaputra]

would like to do this, please assign this issue to me thank you

[Michaelg22]

Hi @dhanusaputra, Thanks for your interest in developing a function. Join our slack community for better communication.

[dhanusaputra]

sure will join the slack, thank you