Initialisation

Added the packages and files for the backend server

node_modules/graphql/utilities/astFromValue.mjs

@@ -0,0 +1,177 @@
+import { inspect } from '../jsutils/inspect.mjs';
+import { invariant } from '../jsutils/invariant.mjs';
+import { isIterableObject } from '../jsutils/isIterableObject.mjs';
+import { isObjectLike } from '../jsutils/isObjectLike.mjs';
+import { Kind } from '../language/kinds.mjs';
+import {
+  isEnumType,
+  isInputObjectType,
+  isLeafType,
+  isListType,
+  isNonNullType,
+} from '../type/definition.mjs';
+import { GraphQLID } from '../type/scalars.mjs';
+/**
+ * Produces a GraphQL Value AST given a JavaScript object.
+ * Function will match JavaScript/JSON values to GraphQL AST schema format
+ * by using suggested GraphQLInputType. For example:
+ *
+ *     astFromValue("value", GraphQLString)
+ *
+ * A GraphQL type must be provided, which will be used to interpret different
+ * JavaScript values.
+ *
+ * | JSON Value    | GraphQL Value        |
+ * | ------------- | -------------------- |
+ * | Object        | Input Object         |
+ * | Array         | List                 |
+ * | Boolean       | Boolean              |
+ * | String        | String / Enum Value  |
+ * | Number        | Int / Float          |
+ * | Unknown       | Enum Value           |
+ * | null          | NullValue            |
+ *
+ */
+
+export function astFromValue(value, type) {
+  if (isNonNullType(type)) {
+    const astValue = astFromValue(value, type.ofType);
+
+    if (
+      (astValue === null || astValue === void 0 ? void 0 : astValue.kind) ===
+      Kind.NULL
+    ) {
+      return null;
+    }
+
+    return astValue;
+  } // only explicit null, not undefined, NaN
+
+  if (value === null) {
+    return {
+      kind: Kind.NULL,
+    };
+  } // undefined
+
+  if (value === undefined) {
+    return null;
+  } // Convert JavaScript array to GraphQL list. If the GraphQLType is a list, but
+  // the value is not an array, convert the value using the list's item type.
+
+  if (isListType(type)) {
+    const itemType = type.ofType;
+
+    if (isIterableObject(value)) {
+      const valuesNodes = [];
+
+      for (const item of value) {
+        const itemNode = astFromValue(item, itemType);
+
+        if (itemNode != null) {
+          valuesNodes.push(itemNode);
+        }
+      }
+
+      return {
+        kind: Kind.LIST,
+        values: valuesNodes,
+      };
+    }
+
+    return astFromValue(value, itemType);
+  } // Populate the fields of the input object by creating ASTs from each value
+  // in the JavaScript object according to the fields in the input type.
+
+  if (isInputObjectType(type)) {
+    if (!isObjectLike(value)) {
+      return null;
+    }
+
+    const fieldNodes = [];
+
+    for (const field of Object.values(type.getFields())) {
+      const fieldValue = astFromValue(value[field.name], field.type);
+
+      if (fieldValue) {
+        fieldNodes.push({
+          kind: Kind.OBJECT_FIELD,
+          name: {
+            kind: Kind.NAME,
+            value: field.name,
+          },
+          value: fieldValue,
+        });
+      }
+    }
+
+    return {
+      kind: Kind.OBJECT,
+      fields: fieldNodes,
+    };
+  }
+
+  if (isLeafType(type)) {
+    // Since value is an internally represented value, it must be serialized
+    // to an externally represented value before converting into an AST.
+    const serialized = type.serialize(value);
+
+    if (serialized == null) {
+      return null;
+    } // Others serialize based on their corresponding JavaScript scalar types.
+
+    if (typeof serialized === 'boolean') {
+      return {
+        kind: Kind.BOOLEAN,
+        value: serialized,
+      };
+    } // JavaScript numbers can be Int or Float values.
+
+    if (typeof serialized === 'number' && Number.isFinite(serialized)) {
+      const stringNum = String(serialized);
+      return integerStringRegExp.test(stringNum)
+        ? {
+            kind: Kind.INT,
+            value: stringNum,
+          }
+        : {
+            kind: Kind.FLOAT,
+            value: stringNum,
+          };
+    }
+
+    if (typeof serialized === 'string') {
+      // Enum types use Enum literals.
+      if (isEnumType(type)) {
+        return {
+          kind: Kind.ENUM,
+          value: serialized,
+        };
+      } // ID types can use Int literals.
+
+      if (type === GraphQLID && integerStringRegExp.test(serialized)) {
+        return {
+          kind: Kind.INT,
+          value: serialized,
+        };
+      }
+
+      return {
+        kind: Kind.STRING,
+        value: serialized,
+      };
+    }
+
+    throw new TypeError(`Cannot convert value to AST: ${inspect(serialized)}.`);
+  }
+  /* c8 ignore next 3 */
+  // Not reachable, all possible types have been considered.
+
+  false || invariant(false, 'Unexpected input type: ' + inspect(type));
+}
+/**
+ * IntValue:
+ *   - NegativeSign? 0
+ *   - NegativeSign? NonZeroDigit ( Digit+ )?
+ */
+
+const integerStringRegExp = /^-?(?:0|[1-9][0-9]*)$/;