239 lines
6.8 KiB
JavaScript

const array = {
// 安全的条件解析器
_parseCondition: function (item, condition) {
// 支持的操作符
const operators = {
"===": (a, b) => a === b,
"!==": (a, b) => a !== b,
">=": (a, b) => a >= b,
"<=": (a, b) => a <= b,
">": (a, b) => a > b,
"<": (a, b) => a < b,
"&&": (a, b) => a && b,
"||": (a, b) => a || b,
includes: (a, b) => String(a).includes(b),
startsWith: (a, b) => String(a).startsWith(b),
endsWith: (a, b) => String(a).endsWith(b),
};
try {
// 简单属性访问
if (/^[a-zA-Z0-9_]+$/.test(condition)) {
return item[condition];
}
// 解析复杂条件
for (const [op, func] of Object.entries(operators)) {
if (condition.includes(op)) {
const [left, right] = condition.split(op).map((s) => s.trim());
const leftValue = left.includes(".")
? left.split(".").reduce((obj, key) => obj[key], item)
: /^[a-zA-Z0-9_]+$/.test(left)
? item[left]
: this._parseValue(left);
const rightValue = right.includes(".")
? right.split(".").reduce((obj, key) => obj[key], item)
: /^[a-zA-Z0-9_]+$/.test(right)
? item[right]
: this._parseValue(right);
return func(leftValue, rightValue);
}
}
return false;
} catch (error) {
return false;
}
},
// 解析值
_parseValue: function (value) {
if (value === "true") return true;
if (value === "false") return false;
if (value === "null") return null;
if (value === "undefined") return undefined;
if (value.startsWith("'") && value.endsWith("'")) return value.slice(1, -1);
if (value.startsWith('"') && value.endsWith('"')) return value.slice(1, -1);
if (!isNaN(value)) return Number(value);
return value;
},
// 数组过滤
filter: function (array, condition) {
if (!Array.isArray(array)) return [];
return array.filter((item) => this._parseCondition(item, condition));
},
// 查找元素
find: function (array, condition) {
if (!Array.isArray(array)) return null;
return array.find((item) => this._parseCondition(item, condition));
},
// 数组映射
map: function (array, transform) {
if (!Array.isArray(array)) return [];
return array.map((item) => {
if (/^[a-zA-Z0-9_.]+$/.test(transform)) {
return transform.split(".").reduce((obj, key) => obj?.[key], item);
}
return item;
});
},
// 数组排序
sort: function (array, key, order = "asc") {
if (!Array.isArray(array)) return [];
return [...array].sort((a, b) => {
const valueA = key ? a[key] : a;
const valueB = key ? b[key] : b;
if (typeof valueA === "string" && typeof valueB === "string") {
return order === "asc"
? valueA.localeCompare(valueB)
: valueB.localeCompare(valueA);
}
return order === "asc" ? valueA - valueB : valueB - valueA;
});
},
// 数组分组
group: function (array, key) {
if (!Array.isArray(array) || !key) return {};
return array.reduce((groups, item) => {
const value = key.split(".").reduce((obj, k) => obj?.[k], item);
if (value !== undefined) {
if (!groups[value]) {
groups[value] = [];
}
groups[value].push(item);
}
return groups;
}, {});
},
// 数组去重
unique: function (array, key) {
if (!Array.isArray(array)) return [];
if (!key) {
return [...new Set(array)];
}
const seen = new Set();
return array.filter((item) => {
const value = key.split(".").reduce((obj, k) => obj?.[k], item);
if (value === undefined || seen.has(value)) {
return false;
}
seen.add(value);
return true;
});
},
// 数组聚合
aggregate: function (array, operation, key) {
if (!Array.isArray(array)) return null;
const values = key
? array.map((item) => key.split(".").reduce((obj, k) => obj?.[k], item))
: array;
const validNumbers = values.filter((v) => !isNaN(v));
switch (operation) {
case "sum":
return validNumbers.reduce((sum, val) => sum + val, 0);
case "avg":
return validNumbers.length
? validNumbers.reduce((sum, val) => sum + val, 0) /
validNumbers.length
: 0;
case "max":
return validNumbers.length ? Math.max(...validNumbers) : null;
case "min":
return validNumbers.length ? Math.min(...validNumbers) : null;
case "count":
return array.length;
default:
return null;
}
},
// 数组切片
slice: function (array, start, end) {
if (!Array.isArray(array)) return [];
return array.slice(start, end);
},
// 数组扁平化
flatten: function (array, depth = 1) {
if (!Array.isArray(array)) return [];
return array.flat(depth);
},
// 数组差集
diff: function (array1, array2, key) {
if (!Array.isArray(array1) || !Array.isArray(array2)) return [];
if (!key) {
return array1.filter((item) => !array2.includes(item));
}
const set2 = new Set(
array2.map((item) => key.split(".").reduce((obj, k) => obj?.[k], item))
);
return array1.filter(
(item) => !set2.has(key.split(".").reduce((obj, k) => obj?.[k], item))
);
},
// 数组交集
intersect: function (array1, array2, key) {
if (!Array.isArray(array1) || !Array.isArray(array2)) return [];
if (!key) {
return array1.filter((item) => array2.includes(item));
}
const set2 = new Set(
array2.map((item) => key.split(".").reduce((obj, k) => obj?.[k], item))
);
return array1.filter((item) =>
set2.has(key.split(".").reduce((obj, k) => obj?.[k], item))
);
},
// 数组并集
union: function (array1, array2, key) {
if (!Array.isArray(array1) || !Array.isArray(array2)) return [];
if (!key) {
return [...new Set([...array1, ...array2])];
}
const seen = new Set();
return [...array1, ...array2].filter((item) => {
const value = key.split(".").reduce((obj, k) => obj?.[k], item);
if (value === undefined || seen.has(value)) {
return false;
}
seen.add(value);
return true;
});
},
// 数组分块
chunk: function (array, size = 1) {
if (!Array.isArray(array) || size < 1) return [];
const chunks = [];
for (let i = 0; i < array.length; i += size) {
chunks.push(array.slice(i, i + size));
}
return chunks;
},
// 数组随机排序
shuffle: function (array) {
if (!Array.isArray(array)) return [];
const result = [...array];
for (let i = result.length - 1; i > 0; i--) {
const j = Math.floor(Math.random() * (i + 1));
[result[i], result[j]] = [result[j], result[i]];
}
return result;
},
};
module.exports = array;