# core/formatters/config.ini.formatter.ts

> 47 lines of code and 6 definitions.

Tree: GovLab Quality
Language: typescript
Layer: processing
Canonical: https://banes-lab.com/anatomy/quality#file-quality-core-formatters-config-ini-formatter-ts
Source text: https://banes-lab.com/source/quality/core/formatters/config.ini.formatter.ts.txt

Listed in [core/formatters](https://banes-lab.com/api/source/quality/core/formatters.md), after [core/formatters/config.formatter.ts](https://banes-lab.com/source/quality/core/formatters/config.formatter.ts.md) and before [core/formatters/config.toml.formatter.ts](https://banes-lab.com/source/quality/core/formatters/config.toml.formatter.ts.md).

## Definitions

- `iniValue` (lexical_declaration, line 16)
- `emitSection` (lexical_declaration, line 26)
- `sectionBlock` (lexical_declaration, line 32)
- `scalar` (lexical_declaration, line 6)
- `serializeIni` (lexical_declaration, line 40, exported)
- `lines` (lexical_declaration, line 44, exported)

## Contained in

- [core/formatters](https://banes-lab.com/anatomy/quality/folder-quality-core-formatters.md)

## Uses

- [core/predicates/config.predicate.ts](https://banes-lab.com/source/quality/core/predicates/config.predicate.ts.md)

## Linked from

- [core/formatters](https://banes-lab.com/anatomy/quality/folder-quality-core-formatters.md)
- [core/predicates](https://banes-lab.com/anatomy/quality/folder-quality-core-predicates.md)

## Source

```typescript
import type { ConfigValue } from "#types/emitter.types";
import { defineFormatter } from "#core/registries/formatter.registry";
import { isConfigObject } from "#core/predicates/config.predicate";
import { treeFor } from "#core/converters/emitter.converter";

const scalar = function scalar(value: boolean | number | string | null): string {
    if (value === null) {
        return "";
    }
    if (typeof value === "boolean") {
        return value ? "true" : "false";
    }
    return String(value);
};

const iniValue = function iniValue(value: ConfigValue): string {
    if (Array.isArray(value)) {
        return value
            .filter((item): item is boolean | number | string | null => !isConfigObject(item) && !Array.isArray(item))
            .map(scalar)
            .join(",");
    }
    return isConfigObject(value) ? "" : scalar(value);
};

const emitSection = function emitSection(obj: Record<string, ConfigValue>): string[] {
    return Object.entries(obj)
        .filter(([, value]) => !isConfigObject(value))
        .map(([key, value]) => `${key}=${iniValue(value)}`);
};

const sectionBlock = function sectionBlock(
    key: string,
    value: Record<string, ConfigValue>,
    needsSeparator: boolean,
): string[] {
    return [...(needsSeparator ? [""] : []), `[${key}]`, ...emitSection(value)];
};

export const serializeIni = function serializeIni(tree: ConfigValue): string {
    if (!isConfigObject(tree)) {
        return "\n";
    }
    const lines = emitSection(tree);
    for (const [key, value] of Object.entries(tree)) {
        if (isConfigObject(value)) {
            lines.push(...sectionBlock(key, value, lines.length > 0));
        }
    }
    return `${lines.join("\n")}\n`;
};

defineFormatter({ format: "ini", render: (input) => serializeIni(treeFor(input)) });
```