pj
Version:
Create SQL strings for PostgreSQL by interfacing with a javascript API
343 lines (251 loc) • 21.9 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };
// third-party modules
var _classer = require('classer');
var _classer2 = _interopRequireDefault(_classer);
var _pg = require('pg');
var _pg2 = _interopRequireDefault(_pg);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
// local classes
/**
* static:
**/
// connection string regex parser
// const R_CONNECT = /^\s*(?:(?:(?:(\w+):\/\/)?(\w+)(?::([^@]+))?@)?(\w+)?\/)?(\w+)(\?.+)\s*$/;
var R_CONNECT = /^\s*([\w\-]+)?(:[^@]+)?@([^:\/?\s]+)?(:\d+)?\/([^?\s]+)\s*/;
// connection defaults
var H_CONNECT_DEFAULTS = {
protocol: 'postgres',
user: 'root',
host: 'localhost'
};
// connect to database using string
var connect_string = function connect_string(s_connect) {
// parse connection string
var m_connect = R_CONNECT.exec(s_connect);
// invalid connection string
if (!m_connect) return local.fail('invalid connection string: "' + s_connect + '"');
// construct full postgres connection string
return ''
// protocol
+ (false || H_CONNECT_DEFAULTS.protocol) + '://'
// user
+ (m_connect[1] || H_CONNECT_DEFAULTS.user)
// password
+ (m_connect[2] ? m_connect[2] : '') + '@'
// host
+ (m_connect[3] || H_CONNECT_DEFAULTS.host)
// port
+ (m_connect[4] ? m_connect[4] : '') + '/'
// database
+ m_connect[5];
};
// escape string literal
var escape_literal = function escape_literal(s_value) {
return s_value.replace(/'/g, '\'\'').replace(/\t/g, '\\t').replace(/\n/g, '\\n');
};
//
var valuify = function valuify(z_value) {
switch (typeof z_value === 'undefined' ? 'undefined' : _typeof(z_value)) {
case 'string':
return '\'' + escape_literal(z_value) + '\'';
case 'number':
return z_value;
case 'boolean':
return z_value ? 'TRUE' : 'FALSE';
case 'object':
// null
if (null === z_value) {
return null;
}
// raw sql
else if ('string' === typeof z_value.raw) {
return z_value.raw;
}
// default
return escape_literal(JSON.stringify(z_value));
case 'function':
return z_value() + '';
default:
throw 'unable to convert into safe value: "${z_value}"';
}
};
//
var H_WRITERS = {
// convert hash query to string query
insert: function insert(h_query) {
// ref insert list
var a_inserts = h_query.insert;
// prep list of rows that have been observed from first element
var a_keys = Object.keys(a_inserts[0]);
// build columns part of sql string
var s_keys = a_keys.map(function (s_key) {
return '"' + s_key + '"';
}).join(',');
// build values part of sql string
var a_rows = [];
// each insert row
a_inserts.forEach(function (h_row) {
// list of values to insert for this row
var a_values = [];
// each key-value pair in row
for (var s_key in h_row) {
// key is missing from accepted values section
if (-1 === a_keys.indexOf(s_key)) {
return local.fail('new key "${s_key}" introduced after first element in insert chain');
}
// append to values
a_values.push(valuify(h_row[s_key]));
}
// push row to values list
a_rows.push('(' + a_values.join(',') + ')');
});
//
var s_tail = '';
//
if (h_query.conflict_target && h_query.conflict_action) {
s_tail += 'on conflict ' + h_query.conflict_target + ' ' + h_query.conflict_action;
}
// prep sql query string
return 'insert into "' + h_query.into + '" (' + s_keys + ') values ' + a_rows.join(',') + ' ' + s_tail;
}
};
/**
* class:
**/
var local = (0, _classer2.default)('pj', function (z_config) {
//
var a_queue = [];
// connection string
var s_connection = function () {
// setup postgres connection
switch (typeof z_config === 'undefined' ? 'undefined' : _typeof(z_config)) {
// config given as string
case 'string':
// connection string
return connect_string(z_config);
}
return false;
}();
//
if (!s_connection) return local.fail('failed to understand connection config argument');
//
local.info('connecting to postgres w/ ' + s_connection);
// postgres client
var y_client = new _pg2.default.Client(s_connection);
// initiate connection
y_client.connect(function (e_connect) {
// connection error
if (e_connect) {
local.fail('failed to connect');
}
//
next_query();
});
//
var next_query = function next_query() {
// queue is not empty
if (a_queue.length) {
// shift first query from beginning
var h_query = a_queue.shift();
// execute query
y_client.query(h_query.sql, h_query.callback);
}
};
// submit a query to be executed
var submit_query = function submit_query(s_query, f_okay) {
// push to queue
a_queue.push({
sql: s_query,
callback: f_okay
});
// queue was empty
if (1 === a_queue.length) {
// initiate
next_query();
}
};
// query-building for insertion
var qb_insert = function qb_insert(h_query) {
// default insert hash
h_query.insert = h_query.insert || [];
//
var self = {
// insert rows
insert: function insert(z_values) {
// list of rows to insert simultaneously
if (Array.isArray(z_values)) {
var _h_query$insert;
// append to existing insertion list
(_h_query$insert = h_query.insert).push.apply(_h_query$insert, _toConsumableArray(z_values));
}
// values hash
else if ('object' === (typeof z_values === 'undefined' ? 'undefined' : _typeof(z_values))) {
// single row to append to insertion list
h_query.insert.push(z_values);
}
// other type
else {
local.fail('invalid type for insertion argument');
}
// normal insert actions
return self;
},
// on conflict
on_conflict: function on_conflict(s_target) {
// set conflict target
h_query.conflict_target = '(' + s_target + ')';
// next action hash
return {
// do nothing
do_nothing: function do_nothing() {
// set conflict action
h_query.conflict_action = 'do nothing';
// normal insert actions
return self;
}
};
},
//
debug: function debug() {
// generate sql
var s_sql = H_WRITERS.insert(h_query);
debugger;
return self;
},
//
exec: function exec(f_okay) {
// generate sql
var s_sql = H_WRITERS.insert(h_query);
// submit
submit_query(s_sql, function (e_insert, w_result) {
// insert error
if (e_insert) {
local.fail(e_insert);
}
//
if ('function' === typeof f_okay) {
f_okay(w_result);
}
});
}
};
//
return self;
};
//
return _classer2.default.operator(function () {}, {
// start of an insert query
into: function into(s_table) {
return qb_insert({
into: s_table
});
}
});
});
exports.default = local;
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third-party modules\nimport classer from 'classer';\nimport pg from 'pg';\n\n// local classes\n\n/**\n* static:\n**/\n\n// connection string regex parser\n// const R_CONNECT = /^\\s*(?:(?:(?:(\\w+):\\/\\/)?(\\w+)(?::([^@]+))?@)?(\\w+)?\\/)?(\\w+)(\\?.+)\\s*$/;\nconst R_CONNECT = /^\\s*([\\w\\-]+)?(:[^@]+)?@([^:\\/?\\s]+)?(:\\d+)?\\/([^?\\s]+)\\s*/;\n\n// connection defaults\nconst H_CONNECT_DEFAULTS = {\n\tprotocol: 'postgres',\n\tuser: 'root',\n\thost: 'localhost',\n};\n\n\n// connect to database using string\nconst connect_string = (s_connect) => {\n\n\t// parse connection string\n\tvar m_connect = R_CONNECT.exec(s_connect);\n\n\t// invalid connection string\n\tif(!m_connect) return local.fail(`invalid connection string: \"${s_connect}\"`);\n\n\t// construct full postgres connection string\n\treturn ''\n\t\t\t// protocol\n\t\t\t+(false || H_CONNECT_DEFAULTS.protocol)+'://'\n\t\t\t// user\n\t\t\t+(m_connect[1] || H_CONNECT_DEFAULTS.user)\n\t\t\t\t// password\n\t\t\t\t+(m_connect[2]? m_connect[2]: '')+'@'\n\t\t\t// host\n\t\t\t+(m_connect[3] || H_CONNECT_DEFAULTS.host)\n\t\t\t\t// port\n\t\t\t\t+(m_connect[4]? m_connect[4]: '')+'/'\n\t\t\t// database\n\t\t\t+m_connect[5];\n};\n\n// escape string literal\nconst escape_literal = (s_value) => {\n\treturn s_value\n\t\t.replace(/'/g, '\\'\\'')\n\t\t.replace(/\\t/g, '\\\\t')\n\t\t.replace(/\\n/g, '\\\\n');\n};\n\n//\nconst valuify = (z_value) => {\n\tswitch(typeof z_value) {\n\t\tcase 'string':\n\t\t\treturn `'${escape_literal(z_value)}'`;\n\n\t\tcase 'number':\n\t\t\treturn z_value;\n\n\t\tcase 'boolean':\n\t\t\treturn z_value? 'TRUE': 'FALSE';\n\n\t\tcase 'object':\n\t\t\t// null\n\t\t\tif(null === z_value) {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t\t// raw sql\n\t\t\telse if('string' === typeof z_value.raw) {\n\t\t\t\treturn z_value.raw;\n\t\t\t}\n\n\t\t\t// default\n\t\t\treturn escape_literal(\n\t\t\t\tJSON.stringify(z_value)\n\t\t\t);\n\n\t\tcase 'function':\n\t\t\treturn z_value()+'';\n\n\t\tdefault:\n\t\t\tthrow 'unable to convert into safe value: \"${z_value}\"';\n\t}\n};\n\n// \nconst H_WRITERS = {\n\n\t// convert hash query to string query\n\tinsert(h_query) {\n\n\t\t// ref insert list\n\t\tlet a_inserts = h_query.insert;\n\n\t\t// prep list of rows that have been observed from first element\n\t\tlet a_keys = Object.keys(a_inserts[0]);\n\n\t\t// build columns part of sql string\n\t\tlet s_keys = a_keys.map(s_key => `\"${s_key}\"`).join(',');\n\n\t\t// build values part of sql string\n\t\tlet a_rows = [];\n\n\t\t// each insert row\n\t\ta_inserts.forEach((h_row) => {\n\n\t\t\t// list of values to insert for this row\n\t\t\tlet a_values = [];\n\n\t\t\t// each key-value pair in row\n\t\t\tfor(let s_key in h_row) {\n\n\t\t\t\t// key is missing from accepted values section\n\t\t\t\tif(-1 === a_keys.indexOf(s_key)) {\n\t\t\t\t\treturn local.fail('new key \"${s_key}\" introduced after first element in insert chain');\n\t\t\t\t}\n\n\t\t\t\t// append to values\n\t\t\t\ta_values.push(valuify(h_row[s_key]));\n\t\t\t}\n\n\t\t\t// push row to values list\n\t\t\ta_rows.push(`(${a_values.join(',')})`);\n\t\t});\n\n\t\t//\n\t\tlet s_tail = '';\n\n\t\t//\n\t\tif(h_query.conflict_target && h_query.conflict_action) {\n\t\t\ts_tail += `on conflict ${h_query.conflict_target} ${h_query.conflict_action}`;\n\t\t}\n\n\t\t// prep sql query string\n\t\treturn `insert into \"${h_query.into}\" (${s_keys}) values ${a_rows.join(',')} ${s_tail}`;\n\t},\n};\n\n\n\n/**\n* class:\n**/\nconst local = classer('pj', function(z_config) {\n\n\t//\n\tlet a_queue = [];\n\n\t// connection string\n\tlet s_connection = (() => {\n\n\t\t// setup postgres connection\n\t\tswitch(typeof z_config) {\n\n\t\t\t// config given as string\n\t\t\tcase 'string':\n\t\t\t\t// connection string\n\t\t\t\treturn connect_string(z_config);\n\t\t}\n\n\t\treturn false;\n\t})();\n\n\t//\n\tif(!s_connection) return local.fail('failed to understand connection config argument');\n\n\t//\n\tlocal.info(`connecting to postgres w/ ${s_connection}`);\n\n\t// postgres client\n\tlet y_client = new pg.Client(s_connection);\n\n\t// initiate connection\n\ty_client.connect((e_connect) => {\n\n\t\t// connection error\n\t\tif(e_connect) {\n\t\t\tlocal.fail('failed to connect');\n\t\t}\n\n\t\t// \n\t\tnext_query();\n\t});\n\n\t//\n\tconst next_query = () => {\n\n\t\t// queue is not empty\n\t\tif(a_queue.length) {\n\t\t\t// shift first query from beginning\n\t\t\tlet h_query = a_queue.shift();\n\n\t\t\t// execute query\n\t\t\ty_client.query(h_query.sql, h_query.callback);\n\t\t}\n\t};\n\n\t// submit a query to be executed\n\tconst submit_query = (s_query, f_okay) => {\n\n\t\t// push to queue\n\t\ta_queue.push({\n\t\t\tsql: s_query,\n\t\t\tcallback: f_okay,\n\t\t});\n\n\t\t// queue was empty\n\t\tif(1 === a_queue.length) {\n\t\t\t// initiate\n\t\t\tnext_query();\n\t\t}\n\t};\n\n\t// query-building for insertion\n\tconst qb_insert = (h_query) => {\n\n\t\t// default insert hash\n\t\th_query.insert = h_query.insert || [];\n\n\t\t//\n\t\tconst self = {\n\n\t\t\t// insert rows\n\t\t\tinsert(z_values) {\n\n\t\t\t\t// list of rows to insert simultaneously\n\t\t\t\tif(Array.isArray(z_values)) {\n\n\t\t\t\t\t// append to existing insertion list\n\t\t\t\t\th_query.insert.push(...z_values);\n\t\t\t\t}\n\t\t\t\t// values hash\n\t\t\t\telse if('object' === typeof z_values) {\n\n\t\t\t\t\t// single row to append to insertion list\n\t\t\t\t\th_query.insert.push(z_values);\n\t\t\t\t}\n\t\t\t\t// other type\n\t\t\t\telse {\n\t\t\t\t\tlocal.fail('invalid type for insertion argument');\n\t\t\t\t}\n\n\t\t\t\t// normal insert actions\n\t\t\t\treturn self;\n\t\t\t},\n\n\t\t\t// on conflict\n\t\t\ton_conflict(s_target) {\n\n\t\t\t\t// set conflict target\n\t\t\t\th_query.conflict_target = `(${s_target})`;\n\n\t\t\t\t// next action hash\n\t\t\t\treturn {\n\n\t\t\t\t\t// do nothing\n\t\t\t\t\tdo_nothing() {\n\n\t\t\t\t\t\t// set conflict action\n\t\t\t\t\t\th_query.conflict_action = 'do nothing';\n\n\t\t\t\t\t\t// normal insert actions\n\t\t\t\t\t\treturn self;\n\t\t\t\t\t},\n\t\t\t\t};\n\t\t\t},\n\n\t\t\t//\n\t\t\tdebug() {\n\n\t\t\t\t// generate sql\n\t\t\t\tlet s_sql = H_WRITERS.insert(h_query);\n\n\t\t\t\tdebugger;\n\t\t\t\treturn self;\n\t\t\t},\n\n\t\t\t//\n\t\t\texec(f_okay) {\n\n\t\t\t\t// generate sql\n\t\t\t\tlet s_sql = H_WRITERS.insert(h_query);\n\n\t\t\t\t// submit\n\t\t\t\tsubmit_query(s_sql, (e_insert, w_result) => {\n\n\t\t\t\t\t// insert error\n\t\t\t\t\tif(e_insert) {\n\t\t\t\t\t\tlocal.fail(e_insert);\n\t\t\t\t\t}\n\n\t\t\t\t\t//\n\t\t\t\t\tif('function' === typeof f_okay) {\n\t\t\t\t\t\tf_okay(w_result);\n\t\t\t\t\t}\n\t\t\t\t});\n\t\t\t},\n\t\t};\n\n\t\t//\n\t\treturn self;\n\t};\n\n\n\t//\n\treturn classer.operator(function() {\n\n\t}, {\n\n\t\t// start of an insert query\n\t\tinto(s_table) {\n\t\t\treturn qb_insert({\n\t\t\t\tinto: s_table,\n\t\t\t});\n\t\t},\n\t});\n});\n\nexport default local;\n"],"sourceRoot":"/source/"}