aws-ddk-core
Version:
The AWS DataOps Development Kit is an open source development framework for customers that build data workflows and modern data architecture on AWS.
219 lines (215 loc) • 9.38 kB
JavaScript
'use strict';
var resolveBlockScalar = require('../compose/resolve-block-scalar.js');
var resolveFlowScalar = require('../compose/resolve-flow-scalar.js');
var errors = require('../errors.js');
var stringifyString = require('../stringify/stringifyString.js');
function resolveAsScalar(token, strict = true, onError) {
if (token) {
const _onError = (pos, code, message) => {
const offset = typeof pos === 'number' ? pos : Array.isArray(pos) ? pos[0] : pos.offset;
if (onError)
onError(offset, code, message);
else
throw new errors.YAMLParseError([offset, offset + 1], code, message);
};
switch (token.type) {
case 'scalar':
case 'single-quoted-scalar':
case 'double-quoted-scalar':
return resolveFlowScalar.resolveFlowScalar(token, strict, _onError);
case 'block-scalar':
return resolveBlockScalar.resolveBlockScalar({ options: { strict } }, token, _onError);
}
}
return null;
}
/**
* Create a new scalar token with `value`
*
* Values that represent an actual string but may be parsed as a different type should use a `type` other than `'PLAIN'`,
* as this function does not support any schema operations and won't check for such conflicts.
*
* @param value The string representation of the value, which will have its content properly indented.
* @param context.end Comments and whitespace after the end of the value, or after the block scalar header. If undefined, a newline will be added.
* @param context.implicitKey Being within an implicit key may affect the resolved type of the token's value.
* @param context.indent The indent level of the token.
* @param context.inFlow Is this scalar within a flow collection? This may affect the resolved type of the token's value.
* @param context.offset The offset position of the token.
* @param context.type The preferred type of the scalar token. If undefined, the previous type of the `token` will be used, defaulting to `'PLAIN'`.
*/
function createScalarToken(value, context) {
const { implicitKey = false, indent, inFlow = false, offset = -1, type = 'PLAIN' } = context;
const source = stringifyString.stringifyString({ type, value }, {
implicitKey,
indent: indent > 0 ? ' '.repeat(indent) : '',
inFlow,
options: { blockQuote: true, lineWidth: -1 }
});
const end = context.end ?? [
{ type: 'newline', offset: -1, indent, source: '\n' }
];
switch (source[0]) {
case '|':
case '>': {
const he = source.indexOf('\n');
const head = source.substring(0, he);
const body = source.substring(he + 1) + '\n';
const props = [
{ type: 'block-scalar-header', offset, indent, source: head }
];
if (!addEndtoBlockProps(props, end))
props.push({ type: 'newline', offset: -1, indent, source: '\n' });
return { type: 'block-scalar', offset, indent, props, source: body };
}
case '"':
return { type: 'double-quoted-scalar', offset, indent, source, end };
case "'":
return { type: 'single-quoted-scalar', offset, indent, source, end };
default:
return { type: 'scalar', offset, indent, source, end };
}
}
/**
* Set the value of `token` to the given string `value`, overwriting any previous contents and type that it may have.
*
* Best efforts are made to retain any comments previously associated with the `token`,
* though all contents within a collection's `items` will be overwritten.
*
* Values that represent an actual string but may be parsed as a different type should use a `type` other than `'PLAIN'`,
* as this function does not support any schema operations and won't check for such conflicts.
*
* @param token Any token. If it does not include an `indent` value, the value will be stringified as if it were an implicit key.
* @param value The string representation of the value, which will have its content properly indented.
* @param context.afterKey In most cases, values after a key should have an additional level of indentation.
* @param context.implicitKey Being within an implicit key may affect the resolved type of the token's value.
* @param context.inFlow Being within a flow collection may affect the resolved type of the token's value.
* @param context.type The preferred type of the scalar token. If undefined, the previous type of the `token` will be used, defaulting to `'PLAIN'`.
*/
function setScalarValue(token, value, context = {}) {
let { afterKey = false, implicitKey = false, inFlow = false, type } = context;
let indent = 'indent' in token ? token.indent : null;
if (afterKey && typeof indent === 'number')
indent += 2;
if (!type)
switch (token.type) {
case 'single-quoted-scalar':
type = 'QUOTE_SINGLE';
break;
case 'double-quoted-scalar':
type = 'QUOTE_DOUBLE';
break;
case 'block-scalar': {
const header = token.props[0];
if (header.type !== 'block-scalar-header')
throw new Error('Invalid block scalar header');
type = header.source[0] === '>' ? 'BLOCK_FOLDED' : 'BLOCK_LITERAL';
break;
}
default:
type = 'PLAIN';
}
const source = stringifyString.stringifyString({ type, value }, {
implicitKey: implicitKey || indent === null,
indent: indent !== null && indent > 0 ? ' '.repeat(indent) : '',
inFlow,
options: { blockQuote: true, lineWidth: -1 }
});
switch (source[0]) {
case '|':
case '>':
setBlockScalarValue(token, source);
break;
case '"':
setFlowScalarValue(token, source, 'double-quoted-scalar');
break;
case "'":
setFlowScalarValue(token, source, 'single-quoted-scalar');
break;
default:
setFlowScalarValue(token, source, 'scalar');
}
}
function setBlockScalarValue(token, source) {
const he = source.indexOf('\n');
const head = source.substring(0, he);
const body = source.substring(he + 1) + '\n';
if (token.type === 'block-scalar') {
const header = token.props[0];
if (header.type !== 'block-scalar-header')
throw new Error('Invalid block scalar header');
header.source = head;
token.source = body;
}
else {
const { offset } = token;
const indent = 'indent' in token ? token.indent : -1;
const props = [
{ type: 'block-scalar-header', offset, indent, source: head }
];
if (!addEndtoBlockProps(props, 'end' in token ? token.end : undefined))
props.push({ type: 'newline', offset: -1, indent, source: '\n' });
for (const key of Object.keys(token))
if (key !== 'type' && key !== 'offset')
delete token[key];
Object.assign(token, { type: 'block-scalar', indent, props, source: body });
}
}
/** @returns `true` if last token is a newline */
function addEndtoBlockProps(props, end) {
if (end)
for (const st of end)
switch (st.type) {
case 'space':
case 'comment':
props.push(st);
break;
case 'newline':
props.push(st);
return true;
}
return false;
}
function setFlowScalarValue(token, source, type) {
switch (token.type) {
case 'scalar':
case 'double-quoted-scalar':
case 'single-quoted-scalar':
token.type = type;
token.source = source;
break;
case 'block-scalar': {
const end = token.props.slice(1);
let oa = source.length;
if (token.props[0].type === 'block-scalar-header')
oa -= token.props[0].source.length;
for (const tok of end)
tok.offset += oa;
delete token.props;
Object.assign(token, { type, source, end });
break;
}
case 'block-map':
case 'block-seq': {
const offset = token.offset + source.length;
const nl = { type: 'newline', offset, indent: token.indent, source: '\n' };
delete token.items;
Object.assign(token, { type, source, end: [nl] });
break;
}
default: {
const indent = 'indent' in token ? token.indent : -1;
const end = 'end' in token && Array.isArray(token.end)
? token.end.filter(st => st.type === 'space' ||
st.type === 'comment' ||
st.type === 'newline')
: [];
for (const key of Object.keys(token))
if (key !== 'type' && key !== 'offset')
delete token[key];
Object.assign(token, { type, indent, source, end });
}
}
}
exports.createScalarToken = createScalarToken;
exports.resolveAsScalar = resolveAsScalar;
exports.setScalarValue = setScalarValue;