1 | import find from '../polyfills/find';
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2 | import { Kind } from '../language/kinds';
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3 | import { isObjectType, isInterfaceType, isEnumType, isInputObjectType, isListType, isCompositeType, isInputType, isOutputType, getNullableType, getNamedType } from '../type/definition';
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4 | import { SchemaMetaFieldDef, TypeMetaFieldDef, TypeNameMetaFieldDef } from '../type/introspection';
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5 | import { typeFromAST } from './typeFromAST';
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6 |
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7 |
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8 |
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9 |
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10 |
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11 |
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12 | export var TypeInfo =
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13 |
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14 | function () {
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15 | function TypeInfo(schema, // NOTE: this experimental optional second parameter is only needed in order
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16 | // to support non-spec-compliant codebases. You should never need to use it.
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17 | // It may disappear in the future.
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18 | getFieldDefFn, // Initial type may be provided in rare cases to facilitate traversals
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19 | // beginning somewhere other than documents.
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20 | initialType) {
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21 | this._schema = schema;
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22 | this._typeStack = [];
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23 | this._parentTypeStack = [];
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24 | this._inputTypeStack = [];
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25 | this._fieldDefStack = [];
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26 | this._defaultValueStack = [];
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27 | this._directive = null;
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28 | this._argument = null;
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29 | this._enumValue = null;
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30 | this._getFieldDef = getFieldDefFn || getFieldDef;
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31 |
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32 | if (initialType) {
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33 | if (isInputType(initialType)) {
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34 | this._inputTypeStack.push(initialType);
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35 | }
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36 |
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37 | if (isCompositeType(initialType)) {
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38 | this._parentTypeStack.push(initialType);
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39 | }
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40 |
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41 | if (isOutputType(initialType)) {
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42 | this._typeStack.push(initialType);
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43 | }
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44 | }
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45 | }
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46 |
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47 | var _proto = TypeInfo.prototype;
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48 |
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49 | _proto.getType = function getType() {
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50 | if (this._typeStack.length > 0) {
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51 | return this._typeStack[this._typeStack.length - 1];
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52 | }
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53 | };
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54 |
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55 | _proto.getParentType = function getParentType() {
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56 | if (this._parentTypeStack.length > 0) {
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57 | return this._parentTypeStack[this._parentTypeStack.length - 1];
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58 | }
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59 | };
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60 |
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61 | _proto.getInputType = function getInputType() {
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62 | if (this._inputTypeStack.length > 0) {
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63 | return this._inputTypeStack[this._inputTypeStack.length - 1];
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64 | }
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65 | };
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66 |
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67 | _proto.getParentInputType = function getParentInputType() {
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68 | if (this._inputTypeStack.length > 1) {
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69 | return this._inputTypeStack[this._inputTypeStack.length - 2];
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70 | }
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71 | };
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72 |
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73 | _proto.getFieldDef = function getFieldDef() {
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74 | if (this._fieldDefStack.length > 0) {
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75 | return this._fieldDefStack[this._fieldDefStack.length - 1];
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76 | }
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77 | };
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78 |
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79 | _proto.getDefaultValue = function getDefaultValue() {
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80 | if (this._defaultValueStack.length > 0) {
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81 | return this._defaultValueStack[this._defaultValueStack.length - 1];
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82 | }
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83 | };
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84 |
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85 | _proto.getDirective = function getDirective() {
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86 | return this._directive;
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87 | };
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88 |
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89 | _proto.getArgument = function getArgument() {
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90 | return this._argument;
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91 | };
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92 |
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93 | _proto.getEnumValue = function getEnumValue() {
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94 | return this._enumValue;
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95 | };
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96 |
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97 | _proto.enter = function enter(node) {
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98 | var schema = this._schema;
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99 |
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100 |
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101 |
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102 |
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103 | switch (node.kind) {
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104 | case Kind.SELECTION_SET:
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105 | {
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106 | var namedType = getNamedType(this.getType());
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107 |
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108 | this._parentTypeStack.push(isCompositeType(namedType) ? namedType : undefined);
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109 |
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110 | break;
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111 | }
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112 |
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113 | case Kind.FIELD:
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114 | {
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115 | var parentType = this.getParentType();
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116 | var fieldDef;
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117 | var fieldType;
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118 |
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119 | if (parentType) {
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120 | fieldDef = this._getFieldDef(schema, parentType, node);
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121 |
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122 | if (fieldDef) {
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123 | fieldType = fieldDef.type;
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124 | }
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125 | }
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126 |
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127 | this._fieldDefStack.push(fieldDef);
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128 |
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129 | this._typeStack.push(isOutputType(fieldType) ? fieldType : undefined);
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130 |
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131 | break;
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132 | }
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133 |
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134 | case Kind.DIRECTIVE:
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135 | this._directive = schema.getDirective(node.name.value);
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136 | break;
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137 |
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138 | case Kind.OPERATION_DEFINITION:
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139 | {
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140 | var type;
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141 |
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142 | if (node.operation === 'query') {
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143 | type = schema.getQueryType();
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144 | } else if (node.operation === 'mutation') {
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145 | type = schema.getMutationType();
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146 | } else if (node.operation === 'subscription') {
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147 | type = schema.getSubscriptionType();
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148 | }
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149 |
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150 | this._typeStack.push(isObjectType(type) ? type : undefined);
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151 |
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152 | break;
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153 | }
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154 |
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155 | case Kind.INLINE_FRAGMENT:
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156 | case Kind.FRAGMENT_DEFINITION:
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157 | {
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158 | var typeConditionAST = node.typeCondition;
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159 | var outputType = typeConditionAST ? typeFromAST(schema, typeConditionAST) : getNamedType(this.getType());
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160 |
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161 | this._typeStack.push(isOutputType(outputType) ? outputType : undefined);
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162 |
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163 | break;
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164 | }
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165 |
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166 | case Kind.VARIABLE_DEFINITION:
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167 | {
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168 | var inputType = typeFromAST(schema, node.type);
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169 |
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170 | this._inputTypeStack.push(isInputType(inputType) ? inputType : undefined);
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171 |
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172 | break;
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173 | }
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174 |
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175 | case Kind.ARGUMENT:
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176 | {
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177 | var argDef;
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178 | var argType;
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179 | var fieldOrDirective = this.getDirective() || this.getFieldDef();
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180 |
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181 | if (fieldOrDirective) {
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182 | argDef = find(fieldOrDirective.args, function (arg) {
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183 | return arg.name === node.name.value;
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184 | });
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185 |
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186 | if (argDef) {
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187 | argType = argDef.type;
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188 | }
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189 | }
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190 |
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191 | this._argument = argDef;
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192 |
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193 | this._defaultValueStack.push(argDef ? argDef.defaultValue : undefined);
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194 |
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195 | this._inputTypeStack.push(isInputType(argType) ? argType : undefined);
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196 |
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197 | break;
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198 | }
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199 |
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200 | case Kind.LIST:
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201 | {
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202 | var listType = getNullableType(this.getInputType());
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203 | var itemType = isListType(listType) ? listType.ofType : listType;
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204 |
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205 | this._defaultValueStack.push(undefined);
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206 |
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207 | this._inputTypeStack.push(isInputType(itemType) ? itemType : undefined);
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208 |
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209 | break;
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210 | }
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211 |
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212 | case Kind.OBJECT_FIELD:
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213 | {
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214 | var objectType = getNamedType(this.getInputType());
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215 | var inputFieldType;
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216 | var inputField;
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217 |
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218 | if (isInputObjectType(objectType)) {
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219 | inputField = objectType.getFields()[node.name.value];
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220 |
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221 | if (inputField) {
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222 | inputFieldType = inputField.type;
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223 | }
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224 | }
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225 |
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226 | this._defaultValueStack.push(inputField ? inputField.defaultValue : undefined);
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227 |
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228 | this._inputTypeStack.push(isInputType(inputFieldType) ? inputFieldType : undefined);
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229 |
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230 | break;
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231 | }
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232 |
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233 | case Kind.ENUM:
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234 | {
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235 | var enumType = getNamedType(this.getInputType());
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236 | var enumValue;
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237 |
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238 | if (isEnumType(enumType)) {
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239 | enumValue = enumType.getValue(node.value);
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240 | }
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241 |
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242 | this._enumValue = enumValue;
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243 | break;
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244 | }
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245 | }
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246 | };
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247 |
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248 | _proto.leave = function leave(node) {
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249 | switch (node.kind) {
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250 | case Kind.SELECTION_SET:
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251 | this._parentTypeStack.pop();
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252 |
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253 | break;
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254 |
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255 | case Kind.FIELD:
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256 | this._fieldDefStack.pop();
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257 |
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258 | this._typeStack.pop();
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259 |
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260 | break;
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261 |
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262 | case Kind.DIRECTIVE:
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263 | this._directive = null;
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264 | break;
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265 |
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266 | case Kind.OPERATION_DEFINITION:
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267 | case Kind.INLINE_FRAGMENT:
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268 | case Kind.FRAGMENT_DEFINITION:
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269 | this._typeStack.pop();
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270 |
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271 | break;
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272 |
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273 | case Kind.VARIABLE_DEFINITION:
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274 | this._inputTypeStack.pop();
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275 |
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276 | break;
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277 |
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278 | case Kind.ARGUMENT:
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279 | this._argument = null;
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280 |
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281 | this._defaultValueStack.pop();
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282 |
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283 | this._inputTypeStack.pop();
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284 |
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285 | break;
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286 |
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287 | case Kind.LIST:
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288 | case Kind.OBJECT_FIELD:
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289 | this._defaultValueStack.pop();
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290 |
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291 | this._inputTypeStack.pop();
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292 |
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293 | break;
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294 |
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295 | case Kind.ENUM:
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296 | this._enumValue = null;
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297 | break;
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298 | }
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299 | };
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300 |
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301 | return TypeInfo;
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302 | }();
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303 |
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304 |
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305 |
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306 |
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307 |
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308 |
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309 | function getFieldDef(schema, parentType, fieldNode) {
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310 | var name = fieldNode.name.value;
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311 |
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312 | if (name === SchemaMetaFieldDef.name && schema.getQueryType() === parentType) {
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313 | return SchemaMetaFieldDef;
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314 | }
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315 |
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316 | if (name === TypeMetaFieldDef.name && schema.getQueryType() === parentType) {
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317 | return TypeMetaFieldDef;
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318 | }
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319 |
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320 | if (name === TypeNameMetaFieldDef.name && isCompositeType(parentType)) {
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321 | return TypeNameMetaFieldDef;
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322 | }
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323 |
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324 | if (isObjectType(parentType) || isInterfaceType(parentType)) {
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325 | return parentType.getFields()[name];
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326 | }
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327 | }
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