1 | "use strict";
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2 |
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3 |
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4 | function _isType (template) {
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5 | if (
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6 | (template === String)
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7 | || (template === Number)
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8 | || (template === Boolean)
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9 | || (template === Array)
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10 | || (template === Symbol)
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11 | || (template === Map)
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12 | || (template === Set)
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13 | || (template === WeakMap)
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14 | || (template === WeakSet)
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15 | || (template === Object)
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16 | || (template === Function)
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17 | ) {
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18 | return true;
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19 | }
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20 |
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21 | return false;
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22 | }
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23 |
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24 | function _sameType (template, obj) {
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25 | if (
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26 | (template === String && typeof obj === "string")
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27 | || (template === Number && typeof obj === "number")
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28 | || (template === Boolean && typeof obj === "boolean")
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29 | || (template === Array && Array.isArray(obj))
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30 | || (template === Symbol && obj instanceof Symbol)
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31 | || (template === Map && obj instanceof Map)
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32 | || (template === Set && obj instanceof Set)
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33 | || (template === WeakMap && obj instanceof WeakMap)
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34 | || (template === WeakSet && obj instanceof WeakSet)
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35 | || (template === Function && typeof obj === "function")
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36 | || (template === Object && typeof obj === "object")
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37 | ) {
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38 | return true;
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39 | }
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40 |
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41 | return false;
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42 | }
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43 |
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44 |
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45 | function filter (template, obj, onException) {
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46 |
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47 |
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48 | if (typeof template === "undefined") {
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49 | return undefined;
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50 | }
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51 |
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52 |
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53 | if ( _isType(template) ) {
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54 | if ( _sameType(template, obj) ) {
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55 | return obj;
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56 | }
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57 |
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58 |
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59 | if (onException) {
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60 | return onException(template, obj);
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61 | }
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62 | return undefined;
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63 | }
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64 |
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65 |
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66 | if (template instanceof Array) {
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67 | if (onException) {
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68 | return onException(
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69 | template,
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70 | obj,
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71 | "obj-filter: Doesn't support Array in template yet. The meaning might differ in different context. Please use custom function instead.\nTreating as `true`"
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72 | );
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73 | }
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74 | return obj;
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75 | }
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76 |
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77 |
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78 | if ( typeof template === "object" ){
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79 | if (typeof obj === "object") {
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80 | var result = {};
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81 | Object.keys(template).forEach( function (key) {
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82 | var tmp = filter(template[key], obj[key], onException);
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83 |
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84 | if (typeof tmp !== "undefined") {
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85 | result[key] = tmp;
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86 | }
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87 | });
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88 | return result;
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89 | }
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90 |
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91 |
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92 | if (onException) {
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93 | return onException(template, obj);
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94 | }
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95 | return undefined;
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96 | }
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97 |
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98 |
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99 | if ( typeof template === "function" ) {
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100 | return template(obj);
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101 | }
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102 |
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103 | return obj;
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104 | }
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105 |
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106 | function merge (template, obj, onException) {
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107 |
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108 |
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109 | if (typeof template === "undefined") {
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110 | return undefined;
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111 | }
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112 |
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113 |
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114 | if ( _isType(template) ) {
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115 | if ( _sameType(template, obj) ) {
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116 | return obj;
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117 | }
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118 |
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119 |
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120 | if (onException) {
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121 | return onException(
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122 | template,
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123 | obj,
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124 | "obj-filter: merge: Using Type Checking in template but object target object doesn't match.\nReturning template Type as result."
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125 | );
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126 | }
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127 | return template;
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128 | }
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129 |
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130 |
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131 | if (template instanceof Array) {
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132 | if (onException) {
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133 | return onException(
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134 | template,
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135 | obj,
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136 | "obj-filter: merge: Doesn't support Array in template yet. The meaning might differ in different context. Please use custom function instead.\nTreating as `true`"
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137 | );
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138 | }
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139 | return obj;
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140 | }
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141 |
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142 |
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143 | if ( typeof template === "object" ){
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144 | if (typeof obj === "object") {
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145 | var result = {};
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146 | Object.keys(template).forEach( function (key) {
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147 | var ret = merge(template[key], obj[key], onException);
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148 |
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149 | if (typeof ret !== "undefined") {
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150 | result[key] = ret;
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151 | } else if (typeof template[key] !== "undefined") {
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152 | result[key] = template[key];
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153 | }
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154 | });
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155 | return result;
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156 | } else {
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157 |
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158 | if (onException) {
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159 | return onException(
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160 | template,
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161 | obj,
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162 | "obj-filter: merge: template is object but target is not.\nReturning template as result."
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163 | );
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164 | }
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165 | return template;
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166 | }
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167 | }
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168 |
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169 |
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170 | if ( typeof template === "function" ) {
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171 | return template(obj);
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172 | }
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173 |
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174 |
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175 | if (typeof obj === "undefined") {
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176 | return template;
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177 | }
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178 |
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179 | return obj;
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180 | }
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181 |
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182 | function exist (template, obj, onException) {
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183 |
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184 |
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185 | if (typeof template === "undefined") {
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186 | return undefined;
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187 | }
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188 |
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189 |
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190 | if ( _isType(template) ) {
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191 | if ( _sameType(template, obj) ) {
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192 | return obj;
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193 | }
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194 |
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195 |
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196 | if (onException) {
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197 | return onException(
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198 | template,
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199 | obj,
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200 | "obj-filter: exist: Using Type Checking in template but object target object doesn't match.\nReturning undefined."
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201 | );
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202 | }
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203 |
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204 | return undefined;
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205 | }
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206 |
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207 |
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208 | if (template instanceof Array) {
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209 | if (onException) {
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210 | return onException(
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211 | template,
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212 | obj,
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213 | "obj-filter: exist: Doesn't support Array in template yet. The meaning might differ in different context. Please use custom function instead.\nTreating as `true`"
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214 | );
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215 | }
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216 | return obj;
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217 | }
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218 |
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219 |
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220 | if (typeof template === "function") {
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221 | return template(obj);
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222 | }
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223 |
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224 |
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225 | if (typeof obj === "undefined") {
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226 | return undefined;
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227 | }
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228 |
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229 |
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230 | if (typeof template === "object") {
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231 | var result = {};
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232 |
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233 | for (const key in template) {
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234 | if (template[key] === undefined) {
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235 |
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236 | continue;
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237 | }
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238 |
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239 | var tmp = exist(template[key], obj[key], onException);
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240 |
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241 | if (typeof tmp !== "undefined") {
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242 | result[key] = tmp;
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243 | } else {
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244 | return undefined;
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245 | }
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246 | }
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247 |
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248 | return result;
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249 | }
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250 |
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251 |
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252 | return obj;
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253 | }
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254 |
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255 |
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256 | function ArrayIter (checker, template, {min = 0, onException} = {}) {
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257 |
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258 | if (typeof(checker) !== "function") {
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259 | if (onException) {
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260 | return onException(undefined, undefined, "obj-filter: First argument of ArrayIter must be a function of obj-filter");
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261 | } else {
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262 | throw new Error("obj-filter: First argument of ArrayIter must be a function of obj-filter");
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263 | }
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264 | }
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265 |
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266 | return function (array) {
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267 | if (!(array instanceof Array)) {
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268 | return undefined;
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269 | }
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270 |
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271 | let result = array.map((value) => {
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272 | return checker(template, value, onException);
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273 | }).filter((x) => x !== undefined);
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274 |
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275 | return result.length >= min ? result : undefined;
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276 | };
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277 | }
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278 |
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279 |
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280 | filter.prototype.merge = merge;
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281 | filter.prototype.exist = exist;
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282 | filter.prototype.ArrayIter = ArrayIter;
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283 |
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284 |
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285 | module.exports = filter;
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286 | module.exports.filter = filter;
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287 | module.exports.merge = merge;
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288 | module.exports.exist = exist;
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289 | module.exports.ArrayIter = ArrayIter;
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