ditto-chaiscripts/JsonMinify.chai at main · Automations-Project/ditto-chaiscripts · GitHub

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// Ditto JSON Minifier - Production Grade v1.0
var oldString = clip.GetAsciiString();

// Quick size checks
if (oldString.size() == 0)
{
    return false;
}

// Size guard - skip clips over 1MB
if (oldString.size() > 1000000)
{
    return false;
}

// Trim leading whitespace to find actual content start
var trimmedStart = 0;
while (trimmedStart < oldString.size() &&
       (oldString[trimmedStart] == ' ' || oldString[trimmedStart] == '\n' ||
        oldString[trimmedStart] == '\r' || oldString[trimmedStart] == '\t'))
{
    trimmedStart = trimmedStart + 1;
}

// Must start with { or [ after whitespace
if (trimmedStart >= oldString.size() ||
    (oldString[trimmedStart] != '{' && oldString[trimmedStart] != '['))
{
    return false;
}

// Early exit - already minified (no newlines/tabs = likely already compact)
if (oldString.find("\n") == -1 && oldString.find("\t") == -1 && oldString.find("\r") == -1)
{
    return false;
}

// Validate matching braces/brackets to reject invalid JSON early
var openBrace = 0;
var openBracket = 0;
var inString = false;
var escapeNext = false;

for (var i = trimmedStart; i < oldString.size(); ++i)
{
    var ch = oldString[i];

    if (escapeNext)
    {
        escapeNext = false;
        continue;
    }

    if (ch == '\\')
    {
        escapeNext = true;
        continue;
    }

    if (ch == '"')
    {
        inString = !inString;
        continue;
    }

    if (!inString)
    {
        if (ch == '{')
        {
            openBrace = openBrace + 1;
        }
        else if (ch == '}')
        {
            openBrace = openBrace - 1;
        }
        else if (ch == '[')
        {
            openBracket = openBracket + 1;
        }
        else if (ch == ']')
        {
            openBracket = openBracket - 1;
        }
    }
}

// If braces/brackets don't match, reject
if (openBrace != 0 || openBracket != 0)
{
    return false;
}

// Minify: Remove newlines, tabs, carriage returns
clip.AsciiTextReplaceRegex("[\\r\\n\\t]+", "");

// Remove spaces after colons
clip.AsciiTextReplaceRegex(": +", ":");

// Remove spaces after commas
clip.AsciiTextReplaceRegex(", +", ",");

// Remove spaces around braces
clip.AsciiTextReplaceRegex(" *\\{ *", "{");
clip.AsciiTextReplaceRegex(" *\\} *", "}");

// Remove spaces around brackets
clip.AsciiTextReplaceRegex(" *\\[ *", "[");
clip.AsciiTextReplaceRegex(" *\\] *", "]");

return false;