mirror of
https://github.com/swc-project/swc.git
synced 2024-12-26 07:02:28 +03:00
300 lines
7.7 KiB
TypeScript
300 lines
7.7 KiB
TypeScript
// Loaded from https://raw.githubusercontent.com/denjucks/dex/master/lib/formatter.js
|
|
|
|
|
|
import QueryBuilder from './query/builder.js';
|
|
import Raw from './raw.js';
|
|
import _ from './deps/lodash@4.17.15/index.js';
|
|
const transform = _.transform;
|
|
|
|
// Valid values for the `order by` clause generation.
|
|
const orderBys = ['asc', 'desc'];
|
|
|
|
// Turn this into a lookup map
|
|
const operators = transform(
|
|
[
|
|
'=',
|
|
'<',
|
|
'>',
|
|
'<=',
|
|
'>=',
|
|
'<>',
|
|
'!=',
|
|
'like',
|
|
'not like',
|
|
'between',
|
|
'not between',
|
|
'ilike',
|
|
'not ilike',
|
|
'exists',
|
|
'not exist',
|
|
'rlike',
|
|
'not rlike',
|
|
'regexp',
|
|
'not regexp',
|
|
'&',
|
|
'|',
|
|
'^',
|
|
'<<',
|
|
'>>',
|
|
'~',
|
|
'~*',
|
|
'!~',
|
|
'!~*',
|
|
'#',
|
|
'&&',
|
|
'@>',
|
|
'<@',
|
|
'||',
|
|
'&<',
|
|
'&>',
|
|
'-|-',
|
|
'@@',
|
|
'!!',
|
|
['?', '\\?'],
|
|
['?|', '\\?|'],
|
|
['?&', '\\?&'],
|
|
],
|
|
(result, key) => {
|
|
if (Array.isArray(key)) {
|
|
result[key[0]] = key[1];
|
|
} else {
|
|
result[key] = key;
|
|
}
|
|
},
|
|
{}
|
|
);
|
|
|
|
class Formatter {
|
|
constructor(client, builder) {
|
|
this.client = client;
|
|
this.builder = builder;
|
|
this.bindings = [];
|
|
}
|
|
|
|
// Accepts a string or array of columns to wrap as appropriate.
|
|
columnize(target) {
|
|
const columns = Array.isArray(target) ? target : [target];
|
|
let str = '',
|
|
i = -1;
|
|
while (++i < columns.length) {
|
|
if (i > 0) str += ', ';
|
|
str += this.wrap(columns[i]);
|
|
}
|
|
return str;
|
|
}
|
|
|
|
// Turns a list of values into a list of ?'s, joining them with commas unless
|
|
// a "joining" value is specified (e.g. ' and ')
|
|
parameterize(values, notSetValue) {
|
|
if (typeof values === 'function') return this.parameter(values);
|
|
values = Array.isArray(values) ? values : [values];
|
|
let str = '',
|
|
i = -1;
|
|
while (++i < values.length) {
|
|
if (i > 0) str += ', ';
|
|
str += this.parameter(values[i] === undefined ? notSetValue : values[i]);
|
|
}
|
|
return str;
|
|
}
|
|
|
|
// Formats `values` into a parenthesized list of parameters for a `VALUES`
|
|
// clause.
|
|
//
|
|
// [1, 2] -> '(?, ?)'
|
|
// [[1, 2], [3, 4]] -> '((?, ?), (?, ?))'
|
|
// knex('table') -> '(select * from "table")'
|
|
// knex.raw('select ?', 1) -> '(select ?)'
|
|
//
|
|
values(values) {
|
|
if (Array.isArray(values)) {
|
|
if (Array.isArray(values[0])) {
|
|
return `(${values
|
|
.map((value) => `(${this.parameterize(value)})`)
|
|
.join(', ')})`;
|
|
}
|
|
return `(${this.parameterize(values)})`;
|
|
}
|
|
|
|
if (values instanceof Raw) {
|
|
return `(${this.parameter(values)})`;
|
|
}
|
|
|
|
return this.parameter(values);
|
|
}
|
|
|
|
// Checks whether a value is a function... if it is, we compile it
|
|
// otherwise we check whether it's a raw
|
|
parameter(value) {
|
|
if (typeof value === 'function') {
|
|
return this.outputQuery(this.compileCallback(value), true);
|
|
}
|
|
return this.unwrapRaw(value, true) || '?';
|
|
}
|
|
|
|
unwrapRaw(value, isParameter) {
|
|
let query;
|
|
if (value instanceof QueryBuilder) {
|
|
query = this.client.queryCompiler(value).toSQL();
|
|
if (query.bindings) {
|
|
this.bindings = this.bindings.concat(query.bindings);
|
|
}
|
|
return this.outputQuery(query, isParameter);
|
|
}
|
|
if (value instanceof Raw) {
|
|
value.client = this.client;
|
|
if (this.builder._queryContext) {
|
|
value.queryContext = () => {
|
|
return this.builder._queryContext;
|
|
};
|
|
}
|
|
|
|
query = value.toSQL();
|
|
if (query.bindings) {
|
|
this.bindings = this.bindings.concat(query.bindings);
|
|
}
|
|
return query.sql;
|
|
}
|
|
if (isParameter) {
|
|
this.bindings.push(value);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Creates SQL for a parameter, which might be passed to where() or .with() or
|
|
* pretty much anywhere in API.
|
|
*
|
|
* @param query Callback (for where or complete builder), Raw or QueryBuilder
|
|
* @param method Optional at least 'select' or 'update' are valid
|
|
*/
|
|
rawOrFn(value, method) {
|
|
if (typeof value === 'function') {
|
|
return this.outputQuery(this.compileCallback(value, method));
|
|
}
|
|
return this.unwrapRaw(value) || '';
|
|
}
|
|
|
|
// Puts the appropriate wrapper around a value depending on the database
|
|
// engine, unless it's a knex.raw value, in which case it's left alone.
|
|
wrap(value, isParameter) {
|
|
const raw = this.unwrapRaw(value, isParameter);
|
|
if (raw) return raw;
|
|
switch (typeof value) {
|
|
case 'function':
|
|
return this.outputQuery(this.compileCallback(value), true);
|
|
case 'object':
|
|
return this.parseObject(value);
|
|
case 'number':
|
|
return value;
|
|
default:
|
|
return this.wrapString(value + '');
|
|
}
|
|
}
|
|
|
|
wrapAsIdentifier(value) {
|
|
const queryContext = this.builder.queryContext();
|
|
return this.client.wrapIdentifier((value || '').trim(), queryContext);
|
|
}
|
|
|
|
alias(first, second) {
|
|
return first + ' as ' + second;
|
|
}
|
|
|
|
operator(value) {
|
|
const raw = this.unwrapRaw(value);
|
|
if (raw) return raw;
|
|
const operator = operators[(value || '').toLowerCase()];
|
|
if (!operator) {
|
|
throw new TypeError(`The operator "${value}" is not permitted`);
|
|
}
|
|
return operator;
|
|
}
|
|
|
|
// Specify the direction of the ordering.
|
|
direction(value) {
|
|
const raw = this.unwrapRaw(value);
|
|
if (raw) return raw;
|
|
return orderBys.indexOf((value || '').toLowerCase()) !== -1 ? value : 'asc';
|
|
}
|
|
|
|
// Compiles a callback using the query builder.
|
|
compileCallback(callback, method) {
|
|
const { client } = this;
|
|
|
|
// Build the callback
|
|
const builder = client.queryBuilder();
|
|
callback.call(builder, builder);
|
|
|
|
// Compile the callback, using the current formatter (to track all bindings).
|
|
const compiler = client.queryCompiler(builder);
|
|
compiler.formatter = this;
|
|
|
|
// Return the compiled & parameterized sql.
|
|
return compiler.toSQL(method || builder._method || 'select');
|
|
}
|
|
|
|
// Ensures the query is aliased if necessary.
|
|
outputQuery(compiled, isParameter) {
|
|
let sql = compiled.sql || '';
|
|
if (sql) {
|
|
if (
|
|
(compiled.method === 'select' || compiled.method === 'first') &&
|
|
(isParameter || compiled.as)
|
|
) {
|
|
sql = `(${sql})`;
|
|
if (compiled.as) return this.alias(sql, this.wrap(compiled.as));
|
|
}
|
|
}
|
|
return sql;
|
|
}
|
|
|
|
// Key-value notation for alias
|
|
parseObject(obj) {
|
|
const ret = [];
|
|
for (const alias in obj) {
|
|
const queryOrIdentifier = obj[alias];
|
|
// Avoids double aliasing for subqueries
|
|
if (typeof queryOrIdentifier === 'function') {
|
|
const compiled = this.compileCallback(queryOrIdentifier);
|
|
compiled.as = alias; // enforces the object's alias
|
|
ret.push(this.outputQuery(compiled, true));
|
|
} else if (queryOrIdentifier instanceof QueryBuilder) {
|
|
ret.push(
|
|
this.alias(
|
|
`(${this.wrap(queryOrIdentifier)})`,
|
|
this.wrapAsIdentifier(alias)
|
|
)
|
|
);
|
|
} else {
|
|
ret.push(
|
|
this.alias(this.wrap(queryOrIdentifier), this.wrapAsIdentifier(alias))
|
|
);
|
|
}
|
|
}
|
|
return ret.join(', ');
|
|
}
|
|
|
|
// Coerce to string to prevent strange errors when it's not a string.
|
|
wrapString(value) {
|
|
const asIndex = value.toLowerCase().indexOf(' as ');
|
|
if (asIndex !== -1) {
|
|
const first = value.slice(0, asIndex);
|
|
const second = value.slice(asIndex + 4);
|
|
return this.alias(this.wrap(first), this.wrapAsIdentifier(second));
|
|
}
|
|
const wrapped = [];
|
|
let i = -1;
|
|
const segments = value.split('.');
|
|
while (++i < segments.length) {
|
|
value = segments[i];
|
|
if (i === 0 && segments.length > 1) {
|
|
wrapped.push(this.wrap((value || '').trim()));
|
|
} else {
|
|
wrapped.push(this.wrapAsIdentifier(value));
|
|
}
|
|
}
|
|
return wrapped.join('.');
|
|
}
|
|
}
|
|
|
|
export default Formatter;
|