JSON import support

+ JSON import added
+ code structure refactored

README.md

@@ -7,7 +7,12 @@ Automatically creates typed PocketBase collection and populates it with data.
 
 Columns conflicting with PocketBase's autogenerated system fields (`id`,
 `created`, `updated`; case-insensitive check, target column name's case is not
-affected) are prefixed with `_`.
+affected) are prefixed with `_`. Collection conflict will cause the import to
+fail without any changes to the database.
+
+No rules, options or constraints are set for the new collection (see the import
+log for a full structure). You can modify them after the import from
+PocketBase's dashboard.
 
 ## Types
 
@@ -22,6 +27,7 @@ PocketBase types are:
 - `JSON`
 
 # Configuration
+
 Install the latest [Deno runtime](https://deno.land/) to run the scripts.
 
 In the root directory create `.env` file with the following environment
@@ -33,6 +39,9 @@ variables:
 
 Place your import files inside of `input` directory.
 
+Make sure the target PocketBase instance is running and pointed to by
+`POCKETBASE_URL`.
+
 # Options
 
 You can change the default import options to your needs:
@@ -42,11 +51,16 @@ You can change the default import options to your needs:
 | input     | CSV/JSON | Yes      | The name of the input file (with extension)                                                | --input=example.csv |
 | id        | CSV/JSON | No       | Indicates that `_id` column should be typed as plain text, the type is detected by default | --id                |
 | lf        | CSV      | No       | LF (`\n`) EOL character will be used instead of default CLRF (`\r\n`)                      | --lf                |
-| delimiter | CSV      | No       | Column value separator, defaults to `,`                                                    | --delimiter=";"       |
-| quote     | CSV      | No       | Value quote character, defaults to `'`                                                     | --quote='~"           |
+| delimiter | CSV      | No       | Column value separator, defaults to `,`                                                    | --delimiter=";"     |
+| quote     | CSV      | No       | Value quote character, defaults to `'`                                                     | --quote="~"         |
 
 # CSV
 
+The import is **not** multiline-safe, so if you have a file with strings
+spanning across multiple lines the best option for you is to convert the input
+file to JSON with tools like
+[DB Browser for SQLite](https://sqlitebrowser.org/).
+
 ## Examples
 
 Basic import (root directory):
@@ -66,3 +80,21 @@ Import with custom parser options (you need to adjust `example.csv`):
 ```
 deno run csv.ts --input=example.csv --delimiter=";" --quote="~" --lf
 ```
+
+# JSON
+
+The required data format is an array of row objects.
+
+## Examples
+
+Basic import (root directory):
+
+```
+deno run json.ts --input=example.json
+```
+
+Import without permission prompts and with `_id` column as text:
+
+```
+deno run --allow-read --allow-env --allow-net json.ts --input=example.json --id
+```