apollo-codegen-swift/lib/helpers.js

"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
exports.Helpers = void 0;
const graphql_1 = require("graphql");
const change_case_1 = require("change-case");
const Inflector = __importStar(require("inflected"));
const printing_1 = require("apollo-codegen-core/lib/utilities/printing");
const language_1 = require("./language");
const graphql_2 = require("apollo-codegen-core/lib/utilities/graphql");
const collectAndMergeFields_1 = require("apollo-codegen-core/lib/compiler/visitors/collectAndMergeFields");
const builtInScalarMap = {
    [graphql_1.GraphQLString.name]: "String",
    [graphql_1.GraphQLInt.name]: "Int",
    [graphql_1.GraphQLFloat.name]: "Double",
    [graphql_1.GraphQLBoolean.name]: "Bool",
    [graphql_1.GraphQLID.name]: "GraphQLID"
};
class Helpers {
    constructor(options) {
        this.options = options;
    }
    typeNameFromGraphQLType(type, unmodifiedTypeName, isOptional) {
        if (graphql_1.isNonNullType(type)) {
            return this.typeNameFromGraphQLType(type.ofType, unmodifiedTypeName, false);
        }
        else if (isOptional === undefined) {
            isOptional = true;
        }
        let typeName;
        if (graphql_1.isListType(type)) {
            typeName =
                "[" +
                    this.typeNameFromGraphQLType(type.ofType, unmodifiedTypeName) +
                    "]";
        }
        else if (graphql_1.isScalarType(type)) {
            typeName = this.typeNameForScalarType(type);
        }
        else {
            typeName = unmodifiedTypeName || type.name;
        }
        return isOptional ? typeName + "?" : typeName;
    }
    typeNameForScalarType(type) {
        return (builtInScalarMap[type.name] ||
            (this.options.passthroughCustomScalars
                ? this.options.customScalarsPrefix + type.name
                : graphql_1.GraphQLString.name));
    }
    fieldTypeEnum(type, structName) {
        if (graphql_1.isNonNullType(type)) {
            return language_1.swift `.nonNull(${this.fieldTypeEnum(type.ofType, structName)})`;
        }
        else if (graphql_1.isListType(type)) {
            return language_1.swift `.list(${this.fieldTypeEnum(type.ofType, structName)})`;
        }
        else if (graphql_1.isScalarType(type)) {
            return language_1.swift `.scalar(${this.typeNameForScalarType(type)}.self)`;
        }
        else if (graphql_1.isEnumType(type)) {
            return language_1.swift `.scalar(${type.name}.self)`;
        }
        else if (graphql_1.isCompositeType(type)) {
            return language_1.swift `.object(${structName}.selections)`;
        }
        else {
            throw new Error(`Unknown field type: ${type}`);
        }
    }
    enumCaseName(name) {
        return camelCase(name);
    }
    enumDotCaseName(name) {
        return language_1.swift `.${language_1.SwiftSource.memberName(camelCase(name))}`;
    }
    operationClassName(name) {
        return pascalCase(name);
    }
    structNameForPropertyName(propertyName) {
        return pascalCase(Inflector.singularize(propertyName));
    }
    structNameForFragmentName(fragmentName) {
        return pascalCase(fragmentName);
    }
    structNameForVariant(variant) {
        return ("As" + variant.possibleTypes.map(type => pascalCase(type.name)).join("Or"));
    }
    internalParameterName(propertyName, properties) {
        return language_1.SwiftSource.isValidParameterName(propertyName)
            ? propertyName
            : makeUniqueName(`_${propertyName}`, properties);
    }
    propertyFromField(field, namespace) {
        const { responseKey, isConditional } = field;
        const propertyName = graphql_2.isMetaFieldName(responseKey)
            ? responseKey
            : camelCase(responseKey);
        const structName = printing_1.join([namespace, this.structNameForPropertyName(responseKey)], ".");
        let type = field.type;
        if (isConditional && graphql_1.isNonNullType(type)) {
            type = type.ofType;
        }
        const isOptional = !graphql_1.isNonNullType(type);
        const unmodifiedType = graphql_1.getNamedType(field.type);
        const unmodifiedTypeName = graphql_1.isCompositeType(unmodifiedType)
            ? structName
            : unmodifiedType.name;
        const typeName = this.typeNameFromGraphQLType(type, unmodifiedTypeName);
        return Object.assign({}, field, {
            responseKey,
            propertyName,
            typeName,
            structName,
            isOptional
        });
    }
    propertyFromVariant(variant) {
        const structName = this.structNameForVariant(variant);
        return Object.assign(variant, {
            propertyName: camelCase(structName),
            typeName: structName + "?",
            structName
        });
    }
    propertyFromFragmentSpread(fragmentSpread, isConditional) {
        const structName = this.structNameForFragmentName(fragmentSpread.fragmentName);
        return Object.assign({}, fragmentSpread, {
            propertyName: camelCase(fragmentSpread.fragmentName),
            typeName: isConditional ? structName + "?" : structName,
            structName,
            isConditional
        });
    }
    propertyFromInputField(field) {
        return Object.assign({}, field, {
            propertyName: camelCase(field.name),
            typeName: this.typeNameFromGraphQLType(field.type),
            isOptional: !graphql_1.isNonNullType(field.type)
        });
    }
    propertiesForSelectionSet(selectionSet, namespace) {
        const properties = collectAndMergeFields_1.collectAndMergeFields(selectionSet, true)
            .filter(field => field.name !== "__typename")
            .map(field => this.propertyFromField(field, namespace));
        if (selectionSet.selections.some(selection => selection.kind === "FragmentSpread") &&
            properties.some(property => graphql_1.isCompositeType(graphql_1.getNamedType(property.type)))) {
            return undefined;
        }
        return properties;
    }
    dictionaryLiteralForFieldArguments(args) {
        function expressionFromValue(value) {
            if (value === null) {
                return language_1.swift `nil`;
            }
            else if (value.kind === "Variable") {
                return language_1.swift `GraphQLVariable(${language_1.SwiftSource.string(value.variableName)})`;
            }
            else if (Array.isArray(value)) {
                return (language_1.SwiftSource.wrap(language_1.swift `[`, language_1.SwiftSource.join(value.map(expressionFromValue), ", "), language_1.swift `]`) || language_1.swift `[]`);
            }
            else if (typeof value === "object") {
                return (language_1.SwiftSource.wrap(language_1.swift `[`, language_1.SwiftSource.join(Object.entries(value).map(([key, value]) => {
                    return language_1.swift `${language_1.SwiftSource.string(key)}: ${expressionFromValue(value)}`;
                }), ", "), language_1.swift `]`) || language_1.swift `[:]`);
            }
            else if (typeof value === "string") {
                return language_1.SwiftSource.string(value);
            }
            else {
                return new language_1.SwiftSource(JSON.stringify(value));
            }
        }
        return (language_1.SwiftSource.wrap(language_1.swift `[`, language_1.SwiftSource.join(args.map(arg => {
            return language_1.swift `${language_1.SwiftSource.string(arg.name)}: ${expressionFromValue(arg.value)}`;
        }), ", "), language_1.swift `]`) || language_1.swift `[:]`);
    }
    mapExpressionForType(type, isConditional = false, makeExpression, expression, inputTypeName, outputTypeName) {
        let isOptional;
        if (graphql_1.isNonNullType(type)) {
            isOptional = !!isConditional;
            type = type.ofType;
        }
        else {
            isOptional = true;
        }
        if (graphql_1.isListType(type)) {
            const elementType = type.ofType;
            if (isOptional) {
                return language_1.swift `${expression}.flatMap { ${makeClosureSignature(this.typeNameFromGraphQLType(type, inputTypeName, false), this.typeNameFromGraphQLType(type, outputTypeName, false))} value.map { ${makeClosureSignature(this.typeNameFromGraphQLType(elementType, inputTypeName), this.typeNameFromGraphQLType(elementType, outputTypeName))} ${this.mapExpressionForType(elementType, undefined, makeExpression, language_1.swift `value`, inputTypeName, outputTypeName)} } }`;
            }
            else {
                return language_1.swift `${expression}.map { ${makeClosureSignature(this.typeNameFromGraphQLType(elementType, inputTypeName), this.typeNameFromGraphQLType(elementType, outputTypeName))} ${this.mapExpressionForType(elementType, undefined, makeExpression, language_1.swift `value`, inputTypeName, outputTypeName)} }`;
            }
        }
        else if (isOptional) {
            return language_1.swift `${expression}.flatMap { ${makeClosureSignature(this.typeNameFromGraphQLType(type, inputTypeName, false), this.typeNameFromGraphQLType(type, outputTypeName, false))} ${makeExpression(language_1.swift `value`)} }`;
        }
        else {
            return makeExpression(expression);
        }
    }
}
exports.Helpers = Helpers;
function makeClosureSignature(parameterTypeName, returnTypeName) {
    let closureSignature = language_1.swift `(value: ${parameterTypeName})`;
    if (returnTypeName) {
        closureSignature.append(language_1.swift ` -> ${returnTypeName}`);
    }
    closureSignature.append(language_1.swift ` in`);
    return closureSignature;
}
function makeUniqueName(proposedName, properties) {
    for (let name = proposedName;; name += "_") {
        if (properties.every(prop => prop.propertyName != name)) {
            return name;
        }
    }
}
function camelCase(value) {
    const [_, prefix, middle, suffix] = value.match(/^(_*)(.*?)(_*)$/) || [
        "",
        "",
        value,
        ""
    ];
    return `${prefix}${change_case_1.camelCase(middle)}${suffix}`;
}
function pascalCase(value) {
    const [_, prefix, middle, suffix] = value.match(/^(_*)(.*?)(_*)$/) || [
        "",
        "",
        value,
        ""
    ];
    return `${prefix}${change_case_1.pascalCase(middle)}${suffix}`;
}
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