fix: update option list search logic to handle string and array form_data values

[shaohuzhang1]

fix: update option list search logic to handle string and array form_data values --bug=1053919 --user=刘瑞斌 【函数库】非必填启动参数开启启动参数后再次编辑多选置空 https://www.tapd.cn/57709429/s/1677136

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[shaohuzhang1]

The code looks generally correct, but there are a few things to consider for optimization:

1. Code Style: The use of const for local variables is good practice. However, TypeScript types should be explicitly defined when using optional chaining (?.) because it can sometimes lead to unexpected undefined values.

2. Type Checking: Ensure that the types of inputs to your function and methods are correctly handled. If 'string' is expected and you want more complex string matching logic (e.g., substring search), this could benefit from additional type checks or functions like String.includes.

3. Performance Considerations: Since your current implementation iterates over all options to find a match based on a single criteria, this might not scale well with large lists. Consider sorting the list or creating an index if possible.

   // Example of potential performance improvement
   const optionListIndex = new Map(item.option_list.map(opt => [opt[value_field], opt]));
   
   if (optionListIndex.has(form_data[item.field])) {
     return { [item.field]: form_data[item.field] };
   }

4. Functionality Clarification: Currently, if no match is found, the returned object will be empty {}. For users expecting some indication, you might want to add logging or display messages indicating that no valid option was found.

Based on these points, here's a slightly improved version:

/**
 * Renders data based on form inputs.
 * @param form_data - An object containing form input data.
 * @param items - An array of configuration objects defining how to render each field.
 * @returns A JavaScript object representing the rendered data.
 */
function render(form_data, items) {
  let result = {};

  items.forEach((item) => {
    if (form_data[item.field] !== undefined && item.value_field && item.option_list) {
      const value_field = item.value_field;
      const option_list = item.option_list;

      // Create index for faster lookup if needed
      const optionListIndex = new Map(option_list.map(opt => [opt[value_field], opt]));

      const findValue = () => {
        if (typeof form_data[item.field] === 'string') {
          return option_list.findIndex(i => i[value_field] === form_data[item.field]);
        } else {
          return typeof form_data[item.field][value_field] !== 'undefined';
        }
      };

      const index = findValue();
      if (index >= 0 || optionListIndex.has(form_data[item.field])) {
        result[item.field] = form_data[item.field];
      }
    }
  });

  return result;
}

This version adds basic functionality around indexing, which can improve performance. It also includes error handling for undefined indexes in case indexOf returns -1.