1 | import { Kind } from '../language/kinds.mjs';
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2 | import { visit } from '../language/visitor.mjs';
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3 |
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4 |
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5 |
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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 | export function separateOperations(documentAST) {
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11 | const operations = [];
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12 | const depGraph = Object.create(null);
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13 |
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14 | for (const definitionNode of documentAST.definitions) {
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15 | switch (definitionNode.kind) {
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16 | case Kind.OPERATION_DEFINITION:
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17 | operations.push(definitionNode);
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18 | break;
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19 |
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20 | case Kind.FRAGMENT_DEFINITION:
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21 | depGraph[definitionNode.name.value] = collectDependencies(
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22 | definitionNode.selectionSet,
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23 | );
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24 | break;
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25 |
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26 | default:
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27 | }
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28 | }
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29 |
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30 |
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31 | const separatedDocumentASTs = Object.create(null);
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32 |
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33 | for (const operation of operations) {
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34 | const dependencies = new Set();
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35 |
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36 | for (const fragmentName of collectDependencies(operation.selectionSet)) {
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37 | collectTransitiveDependencies(dependencies, depGraph, fragmentName);
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38 | }
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39 |
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40 | const operationName = operation.name ? operation.name.value : '';
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41 |
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42 |
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43 | separatedDocumentASTs[operationName] = {
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44 | kind: Kind.DOCUMENT,
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45 | definitions: documentAST.definitions.filter(
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46 | (node) =>
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47 | node === operation ||
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48 | (node.kind === Kind.FRAGMENT_DEFINITION &&
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49 | dependencies.has(node.name.value)),
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50 | ),
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51 | };
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52 | }
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53 |
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54 | return separatedDocumentASTs;
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55 | }
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56 |
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57 |
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58 |
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59 | function collectTransitiveDependencies(collected, depGraph, fromName) {
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60 | if (!collected.has(fromName)) {
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61 | collected.add(fromName);
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62 | const immediateDeps = depGraph[fromName];
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63 |
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64 | if (immediateDeps !== undefined) {
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65 | for (const toName of immediateDeps) {
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66 | collectTransitiveDependencies(collected, depGraph, toName);
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67 | }
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68 | }
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69 | }
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70 | }
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71 |
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72 | function collectDependencies(selectionSet) {
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73 | const dependencies = [];
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74 | visit(selectionSet, {
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75 | FragmentSpread(node) {
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76 | dependencies.push(node.name.value);
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77 | },
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78 | });
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79 | return dependencies;
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80 | }
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