Get Regex Expression Before a Condition-CodePudding

I wanted to output the following based on regex expressions. I wanted to have some kind of reusability based on filename formats

Filename formats

   export const datas = [
      {
        id: 1,
        name: "CODE_SLOT",
        codePosition: 0,
        codeType: "_",
        slotPosition: 1,
        slotType: "_",
      },
      {
        id: 2,
        name: "CODE-SLOT",
        codePosition: 0,
        codeType: "-",
        slotPosition: 1,
        slotType: "-",
      },
    ];

Code for product code

export const getProductCode = (code, codePosition, codeType) => {
  return (
    code.replace(/\.[^/.] $/, "").split(codeType)[codePosition] ||
    code.replace(/\.[^/.] $/, "").split(codeType)[0] ||
    ""
  );
};



const images = [{
    name: "toys-blue_wide.jpg"
}]

const selectedFileNameFormat = datas[0]

const output = images.map((image) => ({
  productCode: getProductCode(
    image?.name,
    selectedFileNameFormat?.codePosition,
    selectedFileNameFormat?.codeType
  ),
}));

console.log(output)

Expected Output for Product Code

productCode: toys-blue

Code for slot

export const getSlot = (slot, slotPosition, slotPosition) => {
  return (
    slot.replace(/\.[^/.] $/, "").split(slotPosition)[slotPosition] ||
    slot.replace(/\.[^/.] $/, "").split(slotPosition)[0] ||
    ""
  );
};
    const images = [{
    name: "toys-blue_wide.jpg"
}]
const selectedFileNameFormat = datas[0]

const output = images.map((image) => ({
  slotCode: getSlot(
    image?.name,
    selectedFileNameFormat?.codePosition,
    selectedFileNameFormat?.codeType
  ),
}));

Expected Output for slot

slotCode: wide

CodePudding user response：

If I'm understanding your question correctly, you want to parse/extract from a string, i.e. "toy-blue_wide.jpg", a productCode everything before the "_" character, i.e. "toy-blue", and a slotCode, everything after the "_" excluding the file extension. You can use a single REGEX and capture these two parts into their respective groups.

/^(.*)_(.*)\./

The first parens captures the product code and the second captures the slot code. Using