[no publish] progressing dot parser
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/snippets/
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@ -1,17 +1,65 @@
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/* eslint-disable no-magic-numbers */
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'use strict';
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const fs = require ('fs-extra');
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/**
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* @param str
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* convert short type notation to knex notation
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*
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* @param {string} short short type
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* @returns {string} type
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*/
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function get_type (short) {
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switch (short) {
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case '\'\'':
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return 'string';
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case '#':
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return 'integer';
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case '#.#':
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return 'double';
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case '✓':
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return 'boolean';
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case '🖹':
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return 'text';
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default:
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return '';
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}
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}
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/**
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* returns columns and attributes for a table
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*
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* @param {string} str table definition
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* @returns {object} table info
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*/
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function get_table_info (str) {
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const lines = str.split (/\n/ug);
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lines.splice (0, 2);
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lines.splice (lines.length - 2, 2);
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const name_line = lines.splice (0);
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const { name } = (/<b>(?<name>\S)<\/b>/u).exec (name_line).groups;
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const name_line = lines.shift ();
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const { name } = (/<b>(?<name>\S+)<\/b>/u).exec (name_line).groups;
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const columns = [];
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while (lines.length > 0) {
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const col = {};
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const l = lines.shift ();
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const regex = /<tr><td.*?>(?<props>.*?)<\/td><\/tr>/u;
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const data = regex.exec (l).groups.props.split (/\s+/gu);
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if (data.length === 3 || data[0] === '🔑') {
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const opt = data.shift ();
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if (opt === '★')
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col.unique = true;
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if (opt === '🔑')
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col.type = 'increments';
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}
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col.name = data.shift ();
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if (data.length > 0)
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col.type = get_type (data.shift ());
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columns.push (col);
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}
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return { name, columns };
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}
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@ -20,23 +68,77 @@ function get_table_info (str) {
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* get all tables from a structure file
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*
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* @param {string} file path to the structure file
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* @returns {Array<object>} tables
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* @returns {Promise<object>} tables and foreign keys
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*/
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async function get_tables (file) {
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const lines = (await fs.readFile (file, 'utf-8')).split (/\n/gu);
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const curr = [];
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const tables = [];
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const foreign = [];
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for (const l of lines) {
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if (curr.length > 0 || (/\S+ \[label=</u).test (l))
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curr.push (l);
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if ((/>\]/u).test (l)) {
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if ((/>.*?\]/u).test (l)) {
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tables.push (curr.join ('\n'));
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curr.splice (0, curr.length);
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}
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const fk = (/(?<col>\S+) -> (?<ref>\S+)/u).exec (l);
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if (fk) {
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const col = fk.groups.col.split (':');
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const ref = fk.groups.ref.split (':');
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const foreign_key = {
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table: col[0],
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column: col[1],
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ref_table: ref[0],
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ref_column: ref[1]
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};
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foreign.push (foreign_key);
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}
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}
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return tables.map ((val) => get_table_info (val));
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return {
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tables: tables
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.filter ((val) => val)
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.map ((val) => get_table_info (val)),
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foreign_keys: foreign
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};
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}
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module.exports = { get_tables };
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/**
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* creates a function for creating a table
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*
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* @param {object} table table to create a function for
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* @returns {string} function
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*/
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function create_table_function (table) {
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let func = `/**
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* create table ${table.name}
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*
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* @param {any} knex database connection
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* @returns {Promise} result
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*/
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function create_${table.name} (knex) {
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return knex.schema.createTable ('${table.name}', (table) => {
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${table.columns
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.map ((col) => `table.${col.type}('${col.name}');`)
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.join ('\n ')}
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`;
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const unique = table.columns.filter ((val) => val.unique);
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if (unique.length > 0) {
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func += `\n table.unique(${unique
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.map ((val) => `'${val.name}'`)
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.join (', ')});\n`;
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}
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func += ` });
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}`;
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return func;
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}
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module.exports = { get_tables, create_table_function };
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102
test/db_structure.dot
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102
test/db_structure.dot
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digraph {
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node [shape=box,margin=0,height=0]
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edge [arrowhead=open,style=dashed]
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rankdir="RL";
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users [label=<
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<table border="0" cellborder="1" cellspacing="0">
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<tr><td border="2"><b>users</b></td></tr>
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<tr><td port="id">🔑 id</td></tr>
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<tr><td port="name">★ name ''</td></tr>
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<tr><td port="email">★ email ''</td></tr>
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<tr><td port="password">password ''</td></tr>
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<tr><td port="salt">salt ''</td></tr>
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<tr><td port="deleted">deleted ✓</td></tr>
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</table>
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>]
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applications [label=<
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<table border="0" cellborder="1" cellspacing="0">
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<tr><td border="2"><b>applications</b></td></tr>
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<tr><td port="id">🔑 id</td></tr>
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<tr><td port="name">name ''</td></tr>
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</table>
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>]
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permissions [label=<
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<table border="0" cellborder="1" cellspacing="0">
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<tr><td border="2"><b>permissions</b></td></tr>
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<tr><td port="id">🔑 id</td></tr>
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<tr><td port="user_id">user_id #</td></tr>
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<tr><td>create_app ✓</td></tr>
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<tr><td>manage_users ✓</td></tr>
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<tr><td>manage_permissions ✓</td></tr>
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<tr><td>manage_apps ✓</td></tr>
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<tr><td>manage_keys ✓</td></tr>
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<tr><td>issue_key ✓</td></tr>
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</table>
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>]
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user_access [label=<
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<table border="0" cellborder="1" cellspacing="0">
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<tr><td border="2"><b>user_access</b></td></tr>
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<tr><td port="id">🔑 id</td></tr>
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<tr><td port="user_id">user_id #</td></tr>
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<tr><td port="app_id">app_id #</td></tr>
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<tr><td port="crud">crud ''</td></tr>
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</table>
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>]
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auth_keys [label=<
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<table border="0" cellborder="1" cellspacing="0">
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<tr><td border="2"><b>auth_keys</b></td></tr>
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<tr><td port="id">🔑 id</td></tr>
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<tr><td port="key">★ key ''</td></tr>
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<tr><td port="app_id">app_id #</td></tr>
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<tr><td port="read_data">read_data ✓</td></tr>
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<tr><td port="hash">★ hash ''</td></tr>
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<tr><td port="name">name ''</td></tr>
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</table>
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>]
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categories [label=<
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<table border="0" cellborder="1" cellspacing="0">
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<tr><td border="2"><b>categories</b></td></tr>
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<tr><td port="id">🔑 id</td></tr>
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<tr><td port="name">★ name ''</td></tr>
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<tr><td port="app_id">app_id #</td></tr>
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</table>
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>, shape=box, margin=0]
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log [label=<
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<table border="0" cellborder="1" cellspacing="0">
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<tr><td border="2"><b>log</b></td></tr>
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<tr><td port="id">🔑 id</td></tr>
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<tr><td port="key_id">key_id #</td></tr>
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<tr><td port="app_id">app_id #</td></tr>
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<tr><td port="timestamp">timestamp #</td></tr>
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<tr><td port="category_id">category_id #</td></tr>
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</table>
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>]
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data [label=<
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<table border="0" cellborder="1" cellspacing="0">
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<tr><td border="2"><b>data</b></td></tr>
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<tr><td port="id">🔑 id</td></tr>
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<tr><td port="log_id">log_id #</td></tr>
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<tr><td port="key">key ''</td></tr>
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<tr><td port="value">value ''</td></tr>
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</table>
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>]
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data:log_id -> log:id [color=blue]
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permissions:user_id -> users:id [color=blue]
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log:key_id -> auth_keys:id [color=blue]
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auth_keys:app_id -> applications:id [color=blue]
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user_access:user_id -> users:id [color=red]
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user_access:app_id -> applications:id [color=red]
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log:app_id -> applications:id [color=blue]
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log:category_id -> categories:id [color=blue]
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categories:app_id -> applications:id [color=blue]
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}
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data_key [label=key]
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14
test/index.js
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14
test/index.js
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/* eslint-disable no-console */
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'use strict';
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const dot_parser = require ('../snippets/db/dot_parser');
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/**
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* test
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*/
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async function test () {
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const data = await dot_parser.get_tables ('db_structure.dot');
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for (const table of data)
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console.log (dot_parser.create_table_function (table));
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}
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test ();
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