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SimpleFilter

A filter framework.

此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.cn-greasyfork.org/scripts/441383/1027327/SimpleFilter.js 

  1. // ==UserScript==
  2. // @name         SimpleFilter
  3. // @namespace    ckylin-script-lib-filter-processor
  4. // @version      1.0
  5. // @match        http://*
  6. // @match        https://*
  7. // @author       CKylinMC
  8. // @license      GPLv3 License
  9. // @grant        none
  10. // ==/UserScript==
  11.  
  12. class SimpleFilter{
  13. 	static debug = true;
  14. 	static log = (...args)=>SimpleFilter.debug&&SimpleFilter.logger(...args);
  15. 	constructor(filterObj){
  16. 		if(!SimpleFilter.verify(filterObj)) {
  17. 			throw new Error("filter is invalid, turn on debug mode to see the details.");
  18. 		}
  19. 		this.filterObj = filterObj;
  20. 		this.datas = null;
  21. 	}
  22. 	static logger(...args){
  23. 		console.log("[Filter]",...args);
  24. 	}
  25. 	static async $and(...conditions){
  26. 		for(const condition of conditions){
  27. 			if(condition instanceof Promise){
  28. 				if(!(await condition)) return false;
  29. 			}
  30. 			if(!condition) return false;
  31. 		}
  32. 		return true;
  33. 	}
  34. 	static async $or(...conditions){
  35. 		for(const condition of conditions){
  36. 			if(condition instanceof Promise){
  37. 				if(await condition) return false;
  38. 			}
  39. 			if(condition) return true;
  40. 		}
  41. 		return false;
  42. 	}
  43. 	static verify(obj, depth=0, isroot=true){
  44. 		SimpleFilter.log('-'.repeat(depth+1)+'>','start validate',obj);
  45. 		if(Array.isArray(obj)){
  46. 			SimpleFilter.log('-'.repeat(depth+1)+'>','type: arr',obj);
  47. 			for(const item of obj){
  48. 				if(!SimpleFilter.verify(item, depth+1, false)) return (SimpleFilter.log('-'.repeat(depth+1)+'>','[ERR]','array validator not passed for',item),false);
  49. 			}
  50. 		}else if(typeof(obj)=='function') return (SimpleFilter.log('-'.repeat(depth+1)+'>','[OK]','passed due to function type',obj),true);
  51. 		else{
  52. 			SimpleFilter.log('-'.repeat(depth+1)+'>','type: logic selector',obj);
  53. 			const keys = Object.keys(obj);
  54. 			if(isroot&&keys.length!==1) return (SimpleFilter.log('-'.repeat(depth+1)+'>','[ERR]','subkey length validator not passed for', keys), false);
  55. 			for(const k of keys){
  56. 				if(["$and","$or"].includes(k.toLowerCase())){
  57. 					if(!SimpleFilter.verify(obj[k], depth+1, false)) return (SimpleFilter.log('-'.repeat(depth+1)+'>','[ERR]','value validator not passed for', k), false);
  58. 				}else return (SimpleFilter.log('-'.repeat(depth+1)+'>','[ERR]','key validator not passed for', k),false);
  59. 			}
  60. 		}
  61. 		SimpleFilter.log('-'.repeat(depth+1)+'>','[OK]','passed',obj);
  62. 		return true;
  63. 	}
  64. 	async applyFilterToAll(datas=[]){
  65. 		try{
  66. 			let pool = datas.map(data=>this.applyFilterTo(data));
  67. 			return Promise.all(pool);
  68. 		}catch(e){
  69. 			return null;
  70. 		}
  71. 	}
  72. 	async applyFilterTo(data=null){
  73. 		if(!SimpleFilter.verify(this.filterObj)) return false;
  74. 		this.data = data;
  75. 		try{
  76. 			return await this.applyFilter(this.filterObj);
  77. 		}
  78. 		catch(e){
  79. 			SimpleFilter.log('[ERR]',e);
  80. 			return false;
  81. 		}
  82. 		finally{
  83. 			this.data = null;
  84. 		}
  85. 	}
  86. 	async applyFilter(obj, mode = '$and'){
  87. 		if(Array.isArray(obj)){
  88. 			for(const item of obj){
  89. 				return this.applyFilter(item);
  90. 			}
  91. 		}else if(typeof(obj)=='function'){
  92. 			if(obj.constructor.name=='AsyncFunction'){
  93. 				try{
  94. 					return !!(await obj(this.data));
  95. 				}catch(e){
  96. 					SimpleFilter.log('[ERR]',e);
  97. 					return false;
  98. 				}
  99. 			}else{
  100. 				try{
  101. 					return !!obj(this.data);
  102. 				}catch(e){
  103. 					SimpleFilter.log('[ERR]',e);
  104. 					return false;
  105. 				}
  106. 			}
  107. 		}else{
  108. 			const keys = Object.keys(obj);
  109. 			try{
  110. 				return await SimpleFilter[mode](...keys.map(async k=>{
  111. 					return await this.applyFilter(obj[k],k);
  112. 				}));
  113. 			}catch(e){
  114. 				SimpleFilter.log('[ERR]',e);
  115. 				return false;
  116. 			}
  117. 		}
  118. 	}
  119. }