Getting a count for Tasks

[josephcrawfordSRH]

Is there a way to count tasks from dataviewjs? I ask because I am using the tasks plugin and I do not see a way to actually sum the completed tasks for a weekly/monthly template. I was thinking I could reach into the dom and parse the number of tasks in each file either by counting children elements of a specific element or by getting the count from the footer of the tasks plugin and summing the values. It would be better though if it could be a query.

I am using https://github.com/obsidian-tasks-group/obsidian-tasks but cannot seem to get this to work with previous help from @holroy on LISTS, even though these are in bullet lists they do not appear to be on LISTS on the query. I did try TASKS instead of LISTS in the following query but Obsidian did not like that at all. I would like to filter based on the date the task was completed and not just in a status of completed. This way I can have it in my monthly, weekly, daily templates at the top for quick and easy reference.

```dataviewjs 
let crResult = await dv.query('LIST length(rows) FROM "Journal/Daily" WHERE file.name = this.file.name FLATTEN file.lists as item WHERE meta(item.section).subpath = "Code Reviews"');

const codeReviews = crResult.value.values.length;
const codeReviewsSuffix = codeReviews == 1 ? 'code review' : 'code reviews';

dv.paragraph('Today I was able to complete  **' + codeReviews + '** ' + codeReviewsSuffix + '!'); 
```

Above is how I am currently counting lists and including them in the top of my file. The full message I currently have is the following

This week I was able to complete 20 code reviews, attend 9 meetings and I had 2 things that slowed me down!

I would love to be able to add the ability to say the following

This week I was able to complete 20 code reviews, attend 9 meetings, completed 30 tasks, added 10 new tasks and I had 2 things that slowed me down!

The counting of tasks has me a bit baffled, on top of that the added 10 new tasks would only count for tasks added that week which were not completed that week. I wouldn't want to count a task twice for completed and added so maybe i would need to filter that count based on the date added and the status of incomplete.