# tap-google-sheets
This is a [Singer](https://singer.io) tap that produces JSON-formatted data
following the [Singer
spec](https://github.com/singer-io/getting-started/blob/master/SPEC.md).
This tap:
- Pulls raw data from the [Google Sheets v4 API](https://developers.google.com/sheets/api)
- Extracts the following endpoints:
- [Spreadsheet File](https://developers.google.com/drive/api/v3/reference/files/get)
- [Spreadsheet Metadata, Sheets, Headers](https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets/get)
- [Spreadsheet Values](https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets.values/get)
- For each Sheet:
- Outputs the schema for each resource (based on the column header and datatypes of first row of data)
- Outputs a record for all columns with column headers, and for each row of data until it reaches an empty row
## API Endpoints
[**file (GET)**](https://developers.google.com/drive/api/v3/reference/files/get)
- Endpoint: https://www.googleapis.com/drive/v3/files/${spreadsheet_id}?fields=id,name,createdTime,modifiedTime,version
- Primary keys: id
- Replication strategy: Full (GET file audit data for spreadsheet_id in config)
- Process/Transformations: Replicate Data if Modified
[**metadata (GET)**](https://developers.google.com/drive/api/v3/reference/files/get)
- Endpoint: https://sheets.googleapis.com/v4/spreadsheets/${spreadsheet_id}?includeGridData=true&ranges=1:2
- This endpoint eturns spreadsheet metadata, sheet metadata, and value metadata (data type information)
- Primary keys: spreadsheetId, title, field_name
- Foreign keys: None
- Replication strategy: Full (get and replace file metadata for spreadshee_id in config)
- Process/Transformations:
- Verify Sheets: Check sheets exist (compared to catalog) and check gridProperties (available area)
- sheetId, title, index, gridProperties (rowCount, columnCount)
- Verify Field Headers (1st row): Check field headers exist (compared to catalog), missing headers (columns to skip), column order/position, and column uniqueness
- Header's field_name, position: data.rowData[0].values[i].formattedValue
- Create/Verify Datatypes (2nd row):
- Row 2's datatype, format: data.rowData[1].values[i]
- First check:
- [effectiveValue: key](https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets/other#ExtendedValue)
- Valid types: numberValue, stringValue, boolValue
- Invalid types: formulaValue, errorValue
- Then check:
- [effectiveFormat.numberFormat.type](https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets/cells#NumberFormatType)
- Valid types: UNEPECIFIED, TEXT, NUMBER, PERCENT, CURRENCY, DATE, TIME, DATE_TIME, SCIENTIFIC
- If DATE or DATE_TIME, set JSON schema datatype = string and format = date-time
- [effectiveFormat.numberFormat.pattern](https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets/cells#NumberFormat)
[**values (GET)**](https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets.values/get)
- Endpoint: https://sheets.googleapis.com/v4/spreadsheets/${spreadsheet_id}/values/'${sheet_name}'!${row_range}?dateTimeRenderOption=SERIAL_NUMBER&valueRenderOption=UNFORMATTED_VALUE&majorDimension=ROWS
- This endpoint loops through sheets and row ranges to get the [unformatted values](https://developers.google.com/sheets/api/reference/rest/v4/ValueRenderOption) (effective values only), dates and datetimes as [serial numbers](https://developers.google.com/sheets/api/reference/rest/v4/DateTimeRenderOption)
- Primary keys: row
- Replication strategy: Full (GET file audit data for spreadsheet_id in config)
- Process/Transformations:
- Loop through sheets (compared to catalog selection)
- Send metadata for sheet
- Loop through ranges of rows until reaching empty row or area max row (from sheet metadata)
- Transform values, if necessary (dates, date-times, boolean, integer, numers)
- Process/send records
## Authentication
The [**Google Sheets Setup & Authentication**](https://drive.google.com/open?id=1FojlvtLwS0-BzGS37R0jEXtwSHqSiO1Uw-7RKQQO-C4) Google Doc provides instructions show how to configure the Google Cloud API credentials to enable Google Drive and Google Sheets APIs, configure Google Cloud to authorize/verify your domain ownership, generate an API key (client_id, client_secret), authenticate and generate a refresh_token, and prepare your tap config.json with the necessary parameters.
- Enable Googe Drive APIs and Authorization Scope: https://www.googleapis.com/auth/drive.metadata.readonly
- Enable Google Sheets API and Authorization Scope: https://www.googleapis.com/auth/spreadsheets.readonly
- Tap config.json parameters:
- client_id: identifies your application
- client_secret: authenticates your application
- refresh_token: generates an access token to authorize your session
- spreadsheet_id: unique identifier for each spreadsheet in Google Drive
- start_date: absolute minimum start date to check file modified
- user_agent: tap-name and email address; identifies your application in the Remote API server logs
## Quick Start
1. Install
Clone this repository, and then install using setup.py. We recommend using a virtualenv:
```bash
> virtualenv -p python3 venv
> source venv/bin/activate
> python setup.py install
OR
> cd .../tap-google-sheets
> pip install .
```
2. Dependent libraries
The following dependent libraries were installed.
```bash
> pip install target-json
> pip install target-stitch
> pip install singer-tools
> pip install singer-python
```
- [singer-tools](https://github.com/singer-io/singer-tools)
- [target-stitch](https://github.com/singer-io/target-stitch)
3. Create your tap's `config.json` file. Include the client_id, client_secret, refresh_token, site_urls (website URL properties in a comma delimited list; do not include the domain-level property in the list), start_date (UTC format), and user_agent (tap name with the api user email address).
```json
{
"client_id": "YOUR_CLIENT_ID",
"client_secret": "YOUR_CLIENT_SECRET",
"refresh_token": "YOUR_REFRESH_TOKEN",
"spreadsheet_id": "YOUR_GOOGLE_SPREADSHEET_ID",
"start_date": "2019-01-01T00:00:00Z",
"user_agent": "tap-google-sheets <api_user_email@example.com>"
}
```
Optionally, also create a `state.json` file. `currently_syncing` is an optional attribute used for identifying the last object to be synced in case the job is interrupted mid-stream. The next run would begin where the last job left off.
Only the `performance_reports` uses a bookmark. The date-time bookmark is stored in a nested structure based on the endpoint, site, and sub_type.
```json
{
"currently_syncing": "file_metadata",
"bookmarks": {
"file_metadata": "2019-09-27T22:34:39.000000Z",
"sheets_loaded": "2019-09-27T21:55:42.000000Z"
}
}
```
4. Run the Tap in Discovery Mode
This creates a catalog.json for selecting objects/fields to integrate:
```bash
tap-google-sheets --config config.json --discover > catalog.json
```
See the Singer docs on discovery mode
[here](https://github.com/singer-io/getting-started/blob/master/docs/DISCOVERY_MODE.md#discovery-mode).
5. Run the Tap in Sync Mode (with catalog) and [write out to state file](https://github.com/singer-io/getting-started/blob/master/docs/RUNNING_AND_DEVELOPING.md#running-a-singer-tap-with-a-singer-target)
For Sync mode:
```bash
> tap-google-sheets --config tap_config.json --catalog catalog.json > state.json
> tail -1 state.json > state.json.tmp && mv state.json.tmp state.json
```
To load to json files to verify outputs:
```bash
> tap-google-sheets --config tap_config.json --catalog catalog.json | target-json > state.json
> tail -1 state.json > state.json.tmp && mv state.json.tmp state.json
```
To pseudo-load to [Stitch Import API](https://github.com/singer-io/target-stitch) with dry run:
```bash
> tap-google-sheets --config tap_config.json --catalog catalog.json | target-stitch --config target_config.json --dry-run > state.json
> tail -1 state.json > state.json.tmp && mv state.json.tmp state.json
```
6. Test the Tap
While developing the Google Search Console tap, the following utilities were run in accordance with Singer.io best practices:
Pylint to improve [code quality](https://github.com/singer-io/getting-started/blob/master/docs/BEST_PRACTICES.md#code-quality):
```bash
> pylint tap_google_sheets -d missing-docstring -d logging-format-interpolation -d too-many-locals -d too-many-arguments
```
Pylint test resulted in the following score:
```bash
TBD
```
To [check the tap](https://github.com/singer-io/singer-tools#singer-check-tap) and verify working:
```bash
> tap-google-sheets --config tap_config.json --catalog catalog.json | singer-check-tap > state.json
> tail -1 state.json > state.json.tmp && mv state.json.tmp state.json
```
Check tap resulted in the following:
```bash
TBD
```
---
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