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5 | "use strict";
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6 | var elm_ast_1 = require('./elm-ast');
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7 | var type_1 = require('graphql/type');
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8 | var utilities_1 = require('graphql/utilities');
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9 | var query_to_elm_1 = require('./query-to-elm');
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10 | function decoderForQuery(def, info, schema, fragmentDefinitionMap, seenFragments) {
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11 | return decoderFor(def, info, schema, fragmentDefinitionMap, seenFragments);
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12 | }
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13 | exports.decoderForQuery = decoderForQuery;
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14 | function decoderForFragment(def, info, schema, fragmentDefinitionMap, seenFragments) {
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15 | return decoderFor(def, info, schema, fragmentDefinitionMap, seenFragments);
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16 | }
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17 | exports.decoderForFragment = decoderForFragment;
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18 | function decoderFor(def, info, schema, fragmentDefinitionMap, seenFragments) {
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19 | function walkDefinition(def, info) {
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20 | if (def.kind == 'OperationDefinition') {
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21 | return walkOperationDefinition(def, info);
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22 | }
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23 | else if (def.kind == 'FragmentDefinition') {
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24 | return walkFragmentDefinition(def, info);
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25 | }
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26 | }
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27 | function walkOperationDefinition(def, info) {
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28 | info.enter(def);
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29 | if (def.operation == 'query' || def.operation == 'mutation') {
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30 | var decls = [];
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31 |
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32 | var name_1;
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33 | if (def.name) {
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34 | name_1 = def.name.value;
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35 | }
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36 | else {
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37 | name_1 = 'AnonymousQuery';
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38 | }
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39 | var resultType = name_1[0].toUpperCase() + name_1.substr(1);
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40 |
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41 |
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42 | var expr = walkSelectionSet(def.selectionSet, info);
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43 |
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44 | var parameters = [];
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45 | if (def.variableDefinitions) {
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46 | for (var _i = 0, _a = def.variableDefinitions; _i < _a.length; _i++) {
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47 | var varDef = _a[_i];
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48 | var name_2 = varDef.variable.name.value;
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49 | var type = elm_ast_1.typeToString(query_to_elm_1.typeToElm(utilities_1.typeFromAST(schema, varDef.type)), 0);
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50 |
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51 | parameters.push({ name: name_2, type: type });
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52 | }
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53 | }
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54 | info.leave(def);
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55 | return { expr: 'map ' + resultType + ' ' + expr.expr };
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56 | }
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57 | }
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58 | function walkFragmentDefinition(def, info) {
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59 | info.enter(def);
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60 | var name = def.name.value;
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61 | var decls = [];
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62 | var resultType = name[0].toUpperCase() + name.substr(1);
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63 |
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64 |
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65 | var fields = walkSelectionSet(def.selectionSet, info);
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66 | var fieldNames = getSelectionSetFields(def.selectionSet, info);
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67 | var shape = "(\\" + fieldNames.join(' ') + " -> { " + fieldNames.map(function (f) { return f + ' = ' + f; }).join(', ') + " })";
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68 | info.leave(def);
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69 | return { expr: 'map ' + shape + ' ' + fields.expr };
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70 | }
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71 | function walkSelectionSet(selSet, info, seenFields) {
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72 | if (seenFields === void 0) { seenFields = []; }
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73 | info.enter(selSet);
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74 | var fields = [];
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75 | for (var _i = 0, _a = selSet.selections; _i < _a.length; _i++) {
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76 | var sel = _a[_i];
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77 | if (sel.kind == 'Field') {
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78 | var field = sel;
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79 | if (seenFields.indexOf(field.name.value) == -1) {
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80 | fields.push(walkField(field, info));
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81 | seenFields.push(field.name.value);
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82 | }
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83 | }
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84 | else if (sel.kind == 'FragmentSpread') {
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85 |
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86 | var spreadName = sel.name.value;
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87 | var def_1 = fragmentDefinitionMap[spreadName];
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88 | fields.push(walkSelectionSet(def_1.selectionSet, info, seenFields));
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89 | }
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90 | else if (sel.kind == 'InlineFragment') {
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91 | throw new Error('Should not happen');
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92 | }
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93 | }
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94 | info.leave(selSet);
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95 | return { expr: fields.map(function (f) { return f.expr; }).filter(function (e) { return e.length > 0; }).join('\n |: ') };
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96 | }
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97 | function getSelectionSetFields(selSet, info) {
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98 | info.enter(selSet);
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99 | var fields = [];
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100 | for (var _i = 0, _a = selSet.selections; _i < _a.length; _i++) {
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101 | var sel = _a[_i];
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102 | if (sel.kind == 'Field') {
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103 | var field = sel;
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104 | var name_3 = query_to_elm_1.elmSafeName(field.name.value);
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105 | if (field.alias) {
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106 | name_3 = query_to_elm_1.elmSafeName(field.alias.value);
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107 | }
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108 | if (fields.indexOf(name_3) == -1) {
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109 | fields.push(name_3);
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110 | }
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111 | }
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112 | else if (sel.kind == 'FragmentSpread') {
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113 |
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114 | var spreadName = sel.name.value;
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115 | var def_2 = fragmentDefinitionMap[spreadName];
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116 | for (var _b = 0, _c = getSelectionSetFields(def_2.selectionSet, info); _b < _c.length; _b++) {
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117 | var name_4 = _c[_b];
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118 | if (fields.indexOf(name_4) == -1) {
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119 | fields.push(name_4);
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120 | }
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121 | }
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122 | }
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123 | else if (sel.kind == 'InlineFragment') {
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124 | throw new Error('Should not happen');
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125 | }
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126 | }
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127 | info.leave(selSet);
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128 | return fields;
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129 | }
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130 | function walkField(field, info) {
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131 | info.enter(field);
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132 |
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133 | var name = query_to_elm_1.elmSafeName(field.name.value);
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134 | var originalName = field.name.value;
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135 | var info_type = info.getType();
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136 | var isMaybe = false;
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137 | if (info_type instanceof type_1.GraphQLNonNull) {
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138 | info_type = info_type['ofType'];
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139 | }
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140 | else {
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141 | isMaybe = true;
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142 | }
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143 |
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144 | if (field.alias) {
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145 | name = query_to_elm_1.elmSafeName(field.alias.value);
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146 | originalName = field.alias.value;
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147 | }
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148 |
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149 | var args = field.arguments;
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150 |
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151 | if (query_to_elm_1.getRootType(info_type) instanceof type_1.GraphQLUnionType) {
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152 |
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153 | return walkUnion(originalName, field, info);
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154 | }
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155 | else {
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156 |
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157 | if (field.selectionSet) {
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158 | var prefix = '';
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159 | if (info_type instanceof type_1.GraphQLList) {
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160 | prefix = 'list ';
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161 | }
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162 | var fields = walkSelectionSet(field.selectionSet, info);
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163 | info.leave(field);
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164 | var fieldNames = getSelectionSetFields(field.selectionSet, info);
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165 | var shape = "(\\" + fieldNames.join(' ') + " -> { " + fieldNames.map(function (f) { return f + ' = ' + f; }).join(', ') + " })";
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166 | var left = '(field "' + originalName + '" ';
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167 | var right = '(map ' + shape + ' ' + fields.expr + '))';
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168 | var indent = ' ';
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169 | if (prefix) {
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170 | right = '(' + prefix + right + ')';
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171 | }
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172 | if (isMaybe) {
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173 | right = '(' + 'maybe ' + right + ')';
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174 | }
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175 | return { expr: left + indent + right };
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176 | }
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177 | else {
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178 | var decoder = leafTypeToDecoder(info_type);
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179 | info.leave(field);
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180 | var expr = { expr: '(field "' + originalName + '" (' + decoder + '))' };
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181 | if (isMaybe) {
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182 | expr = { expr: '(maybe ' + expr.expr + ')' };
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183 | }
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184 | return expr;
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185 | }
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186 | }
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187 | }
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188 | function walkUnion(originalName, field, info) {
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189 | var decoder = '\n (\\typename -> case typename of';
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190 | var indent = ' ';
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191 | var info_type = info.getType();
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192 | var isMaybe = false;
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193 | if (info_type instanceof type_1.GraphQLNonNull) {
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194 | info_type = info_type['ofType'];
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195 | }
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196 | else {
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197 | isMaybe = true;
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198 | }
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199 | var prefix = '';
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200 | if (info_type instanceof type_1.GraphQLList) {
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201 | prefix = 'list ';
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202 | }
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203 | for (var _i = 0, _a = field.selectionSet.selections; _i < _a.length; _i++) {
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204 | var sel = _a[_i];
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205 | if (sel.kind == 'InlineFragment') {
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206 | var inlineFragment = sel;
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207 | decoder += "\n" + indent + "\"" + inlineFragment.typeCondition.name.value + "\" -> ";
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208 | info.enter(inlineFragment);
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209 | var fields = walkSelectionSet(inlineFragment.selectionSet, info);
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210 | info.leave(inlineFragment);
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211 | var fieldNames = getSelectionSetFields(inlineFragment.selectionSet, info);
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212 | var ctor = query_to_elm_1.elmSafeName(inlineFragment.typeCondition.name.value);
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213 | var shape = "(\\" + fieldNames.join(' ') + " -> " + ctor + " { " + fieldNames.map(function (f) { return f + ' = ' + f; }).join(', ') + " })";
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214 | var right = '(map ' + shape + ' ' + fields.expr + ')';
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215 | if (prefix) {
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216 | right = '(' + prefix + right + ')';
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217 | }
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218 | if (isMaybe) {
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219 | right = '(' + 'maybe ' + right + ')';
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220 | }
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221 | decoder += right;
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222 | }
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223 | else if (sel.kind == 'Field') {
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224 | var field_1 = sel;
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225 | if (field_1.name.value != '__typename') {
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226 | throw new Error('Unexpected field: ' + field_1.name.value);
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227 | }
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228 | }
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229 | else {
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230 | throw new Error('Unexpected: ' + sel.kind);
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231 | }
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232 | }
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233 | decoder += "\n" + indent + "_ -> fail \"Unexpected union type\")";
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234 | decoder = '((field "__typename" string) |> andThen ' + decoder + ')';
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235 | return { expr: '(field "' + originalName + '" ' + decoder + ')' };
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236 | }
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237 | function leafTypeToDecoder(type) {
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238 | var prefix = '';
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239 | if (type instanceof type_1.GraphQLList) {
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240 | prefix = 'list ';
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241 | type = type['ofType'];
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242 | }
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243 |
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244 | if (type instanceof type_1.GraphQLScalarType) {
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245 | switch (type.name) {
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246 | case 'Int': return prefix + 'int';
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247 | case 'Float': return prefix + 'float';
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248 | case 'Boolean': return prefix + 'bool';
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249 | case 'ID':
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250 | case 'String': return prefix + 'string';
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251 | }
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252 | }
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253 | else if (type instanceof type_1.GraphQLEnumType) {
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254 | return prefix + type.name.toLowerCase() + 'Decoder';
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255 | }
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256 | else {
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257 | throw new Error('not a leaf type: ' + type.name);
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258 | }
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259 | }
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260 | return walkDefinition(def, info);
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261 | }
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262 | exports.decoderFor = decoderFor;
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263 |
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