expo-sqlite
Version:
Provides access to a database using SQLite (https://www.sqlite.org/). The database is persisted across restarts of your app.
74 lines • 2.68 kB
JavaScript
/**
* Normalize the bind params to data structure that can be passed to native module.
* The data structure is a tuple of [primitiveParams, blobParams, shouldPassAsArray].
* @hidden
*/
export function normalizeParams(...params) {
let bindParams = params.length > 1 ? params : params[0];
if (bindParams == null) {
bindParams = [];
}
if (typeof bindParams !== 'object' ||
bindParams instanceof ArrayBuffer ||
ArrayBuffer.isView(bindParams)) {
bindParams = [bindParams];
}
const shouldPassAsArray = Array.isArray(bindParams);
if (Array.isArray(bindParams)) {
bindParams = bindParams.reduce((acc, value, index) => {
acc[index] = value;
return acc;
}, {});
}
const primitiveParams = {};
const blobParams = {};
for (const key in bindParams) {
const value = bindParams[key];
if (value instanceof Uint8Array) {
blobParams[key] = value;
}
else {
primitiveParams[key] = value;
}
}
return [primitiveParams, blobParams, shouldPassAsArray];
}
/**
* Compose `columnNames` and `columnValues` to an row object.
* @hidden
*/
export function composeRow(columnNames, columnValues) {
// TODO(cedric): make these types more generic and tighten the returned object type based on provided column names/values
const row = {};
if (columnNames.length !== columnValues.length) {
throw new Error(`Column names and values count mismatch. Names: ${columnNames.length}, Values: ${columnValues.length}`);
}
for (let i = 0; i < columnNames.length; i++) {
row[columnNames[i]] = columnValues[i];
}
return row;
}
/**
* Compose `columnNames` and `columnValuesList` to an array of row objects.
* @hidden
*/
export function composeRows(columnNames, columnValuesList) {
if (columnValuesList.length === 0) {
return [];
}
if (columnNames.length !== columnValuesList[0].length) {
// We only check the first row because SQLite returns the same column count for all rows.
throw new Error(`Column names and values count mismatch. Names: ${columnNames.length}, Values: ${columnValuesList[0].length}`);
}
const results = [];
for (const columnValues of columnValuesList) {
// TODO(cedric): make these types more generic and tighten the returned object type based on provided column names/values
const row = {};
for (let i = 0; i < columnNames.length; i++) {
row[columnNames[i]] = columnValues[i];
}
results.push(row);
}
return results;
}
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