What is the fastest way to include additional fields in variable declarations on Visual Studio Code?

Welcome to my first question here, please excuse any errors.

Currently, I am in the process of migrating multiple TypeScript-based webservices from Loopback 2 to version 4. This transition has led me to rewrite a significant amount of code due to the changes in model definition syntax introduced in Loopback v4.

For example, consider the old code below...

const foo = ds.define('foo', {
  string1 : String,
  num1 : Number,
  string2 : String,
  string3 : String,
  num2 : Number,
  string4: String,
  string5: String
}

Which now needs to be rewritten as...

@model()
export class foo extends Model {

  @property({ type: 'string', required: true })
  string1 = '';
    
  @property({ type: 'number', required: true })
  num1 = 0;

  @property({ type: 'string', required: true })
  string2 = '';

  @property({ type: 'string', required: true })
  string3 = '';

  @property({ type: 'number', required: true })
  num2 = 0;

  @property({ type: 'string', required: true })
  string4 = '';

  @property({ type: 'string', required: true })
  string5 = '';
}

This conversion needs to be done several times, and it seems like there should be a more efficient tool available for this task!

In essence, adding a @property marker with the appropriate type...

@property({type: 'string', required: true})

At the beginning of each variable declaration, followed by assigning a value. Even though, maintaining its original type as seen in the old code may work as well.

Are there any tools or extensions in Visual Studio Code that can aid me in swiftly reformatting these model definitions? While I am familiar with multi-cursor and search-replace functions, any suggestions on quicker methods would be greatly appreciated.

So far, I have mostly relied on using multi-line selections and find-replacing techniques - which are more efficient than manually adjusting each field. My online searches have not yielded new solutions, suggesting that either I am not articulating my requirements clearly to the search engine, or that the tool I seek might not exist yet.

Answer №1

If you're looking to enhance your coding experience, consider using an extension to customize your selected text. One such option is utilizing Find and Transform, which I developed. To implement this, create a keybinding in your keybindings.json:

{
  "key": "alt+f",                           // choose your desired keybinding
  "command": "findInCurrentFile",
  "description": "migrate TS webservices from LB 2 to LB 4",
  "args": {

    "replace": [
      "$${",
        "const selectedText = document.getText(vscode.window.activeTextEditor.selection);",
        "const lines = selectedText.split(/\\r?\\n/);",  

        "let newStr = '@model()\\n';",
        "let regex = /(?<=define\\(')(.*)'/;",
        "newStr += `export class ${lines[0].match(regex)[1]} extends Model{\\n`;",

        "lines.pop();",                   
        "lines.shift();",                 

        "regex = /\\s*([^\\s:]*)\\s*:\\s*([^,]*),?/;",
        "const indent = '\\t\\t\\t\\t';",  

        "lines.map(line => {",

          "const parsed = line.match(regex);",

          "if (parsed[2] === 'String') {",
            "newStr += `${indent}@property({type: 'string', required: true})\\n`;",
            "newStr += `${indent}${parsed[1]} = '';\\n`;",
          "}",
          "else if (parsed[2] === 'Number') {",
            "newStr += `${indent}@property({type: 'number', required: true})\\n`;",
            "newStr += `${indent}${parsed[1]} = 0;\\n`;",
          "}",
        "});",

        "newStr += `}`;",
        "return newStr",
      "}$$"
    ]
  }
}

This extension enables you to write JavaScript code that can be utilized within the replace function. It extracts the selected text using the vscode API, splits it into lines, and generates an output string based on the defined regex pattern for each line. Feel free to modify the code to accommodate other data types as needed.

https://i.sstatic.net/nj2vg.gif

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