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script

Powershell Mysql helper functions

Some Powershell functions for Preparing Mysql Statements and executing them.

Requires the MySQL .NET Connector

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$Dbserv = "server"
$Dbname = "db"
$Dbuser = "user"
$Dbpass = "pass"
 
#MySQL Database connection
[System.Reflection.Assembly]::LoadWithPartialName("MySql.Data") | Out-Null
$SQLConnection = New-Object MySql.Data.MySqlClient.MySqlConnection
$SQLConnection.ConnectionString = "server=$Dbserv;port=3306;uid=$Dbuser;pwd=$Dbpass;database=$Dbname;Integrated Security=False"
 
function MySQLprepare {
    [OutputType([MySql.Data.MySqlClient.MySqlCommand])]
    param (
        # Query
        [Parameter(
            Mandatory = $true
        )]
        [String]
        $query,
 
        # Connection
        [Parameter(
            Mandatory = $true,
            ValueFromPipeline = $true
        )]
        [MySql.Data.MySqlClient.MySqlConnection]
        $connection
    )
 
    $command = New-Object MySql.Data.MySqlClient.MySqlCommand
    $command.Connection = $connection
    $command.CommandText = $query
 
    (Select-String "@\w+" -input $query -AllMatches).Matches.Value | ForEach-Object {
        if ($_) { $command.Parameters.AddWithValue($_, "") }
    } | Out-Null
 
    $command.Prepare()
 
    return , $command
}
 
function MySQLexec {
    [OutputType([Int])]
    param (
        # QueryParams
        [Parameter(
            Mandatory = $false
        )]
        [hashtable]
        $queryParams = @{},
 
        # Command
        [Parameter(
            Mandatory = $true,
            ValueFromPipeline = $true
        )]
        [MySql.Data.MySqlClient.MySqlCommand]
        $command
    )
 
    (Select-String "@\w+" -input $command.CommandText -AllMatches).Matches.Value | ForEach-Object {
        if ($_) { $command.Parameters[$_].Value = $queryParams[$_] }
    } | Out-Null
 
    $affectedRows = $command.ExecuteNonQuery()
 
    return $affectedRows
}
 
function MySQLquery {
    [OutputType([System.Data.DataTable])]
    param (
        # QueryParams
        [Parameter(
            Mandatory = $false
        )]
        [hashtable]
        $queryParams = @{},
 
        # Command
        [Parameter(
            Mandatory = $true,
            ValueFromPipeline = $true
        )]
        [MySql.Data.MySqlClient.MySqlCommand]
        $command
    )
 
    (Select-String "@\w+" -input $command.CommandText -AllMatches).Matches.Value | ForEach-Object {
        if ($_) { $command.Parameters[$_].Value = $queryParams[$_] }
    } | Out-Null
 
    $dataAdapter = New-Object MySql.Data.MySqlClient.MySqlDataAdapter($command)
    $dataSet = New-Object System.Data.DataSet
    $dataAdapter.Fill($dataSet, "data") | Out-Null
    return , $dataSet.Tables["data"]
}

Examples

Preparing some statements

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$insertVM = $SQLConnection | MySQLprepare -query "INSERT INTO virtual_machines ( id, name, description, status ) VALUES
( @id, @name, @description, 'new' );"
$selectVMs = $SQLConnection | MySQLprepare -query "SELECT * FROM virtual_machines WHERE status LIKE @status;"
$updateVM = $SQLConnection | MySQLprepare -query "UPDATE virtual_machines SET status = @status WHERE id = @id;"

Executing them

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$insertVM | MySQLexec -queryParams @{"@id" = 1; "@name" = 'test'; "@description" = 'example vm'} | Out-Null
 
$dtVMs = $selectVMs | MySQLquery -queryParams @{"@status" = 'new'}
foreach ($vm in $dtVMs.Rows) {
    Write-Host "Working on VM" $vm["id"] -ForegroundColor Cyan
 
    $updateVM | MySQLexec -queryParams @{"@id" = $vm["id"]; "@status" = 'ready'} | Out-Null
}
snippet

js string template

https://gist.github.com/f61ef86d11b9f17eb3a8

StringTemplate.js

String.prototype.template = function (d) {
return this.replace(/\{([^\}]+)\}/g, function (m, n) {
var o = d, p = n.split('|')[0].split('.');
for (var i = 0; i < p.length; i++) {
o = typeof o[p[i]] === "function" ? o[p[i]]() : o[p[i]];
if (typeof o === "undefined" || o === null) return n.indexOf('|') !== -1 ? n.split('|')[1] : m;
}
return o;
});
};
view raw StringTemplate.js hosted with ❤ by GitHub

example.html

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>TestPage</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<script type="text/html" id="tmpl">
<dl>
<dt>simple:</dt>
<dd>{s}</dd>
<dt>default:</dt>
<dd>{d|default}</dd>
<dt>empty default:</dt>
<dd>{ed|}</dd>
<dt>nested:</dt>
<dd>{n.e.s.t.e.d}</dd>
<dt>function:</dt>
<dd>{f}</dd>
</dl>
</script>
<script type="text/javascript" src="StringTemplate.js"></script>
<script type="text/javascript">
document.write("sample object");
document.write(document.getElementById('tmpl').innerHTML.template({
s: "simple value",
d: "default value",
n: {e: {s: {t: {e: {d: "nested value"}}}}},
f: function() { return "function value"; }
}));
document.write("<hr>");
document.write("empty object");
document.write(document.getElementById('tmpl').innerHTML.template({}));
</script>
</body>
</html>
view raw example.html hosted with ❤ by GitHub