mCoffee per Thaddaeus

This is my take on the extension Morning Coffee which allows you to launch bookmarks based on the day of the week, plus some optional time-based rules. I wrote this extension for my own use, and am sharing it in case anyone finds it useful.

More details can be found at https://sites.google.com/view/extension-mcoffee/home.

Usage
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1) create a bookmark folder named "mCoffee". If you have multiple folders with the same name, It will only process the first one found. If you run the extension without a folder named "mCoffee" in your bookmarks, the icon's badge will display "E1" on a red background.

2) Under the "mCoffee" folder, you can create the following subfolders (create only folders that you use, i.e. you don't need to create "Tue" if you don't have Tuesday specific bookmarks to launch)
i) Daily
- place bookmarks that you want to launch everyday in here
ii) Mon / Tue / Wed / Thu / Fri / Sat / Sun
- place bookmarks for specific days into the corresponding folder. e.g. urls in the "Sun" folder will be launched on Sundays
iii) 1 - 31
- place bookmarks for a specific day of the month here. For example, bookmarks in the folder "1" will be launched on the first day of the month (e.g. you want to check your bank statement every 1st day of the month).
iv) Weekday
- bookmarks that you want to launch from Mon - Fri
v) Weekend
- bookmarks that you want to launch on Sat, Sun
vi) Rules
- set conditions for launching bookmarks
- add the conditions as a comma separated list inside square brackets in the bookmark title, e.g. "Testing [2,Mon,Wed]" to launch the bookmark "Testing" on the 2nd of the month, Mondays and Wednesdays
- you can also add the conditions "AM" and "PM" for the bookmarks to launch in the morning only or afternoon e.g. "Testing [2,Mon,Wed,AM]" to launch "Testing" on the mornings of 2nd of the month, Mondays and Wednesdays
- if your bookmark title has 2 brackets, the first set gets processed. e.g. "[Mon,AM] Testing [Tue,PM]" will only be evaluated on the condition "Mon,AM"
- XX-YY to set between a time range, for example 19-21 to launch bookmarks between 7PM and 9PM inclusive.

This is a very basic extension, there is no configuration to be done. You need to manage the bookmarks using the bookmark manager. The plus side of using bookmarks instead of my own internal structure is the bookmarks are sync'ed using the standard Chrome mechanism. The downside is you'll end up with duplicate bookmarks (for example, you may have the same site for Mon and Wed). Or use the rules folder.

The extension checks if the bookmark is already opened in an existing tab, if so it won't launch a duplicate tab. Note that some sites automatically expands / redirect the base url. For example, if you bookmarked https://mail.google.com the opened url will be https://mail.google.com/mail/. If you click on the extension icon again, it will open another tab for Gmail because "https://mail.google.com" doesn't match "https://mail.google.com/mail/".

Bookmarks are opened in the following folder order; Daily, day of week and day of month. Standalone folders are processed first, followed by the Rules folder. For example, if your "Daily" folder has the bookmarks "B1, B5" and your Rules folder has a Daily bookmark "B3", bookmarks are launched in the order B1, B5, B3.

Bookmarks within each folder are opened in the order they are found so you can sort your bookmarks if you want them opened in a particular order.

If it can't find a bookmark folder named "mCoffee", the icon will turn red. Clicking on the extension icon will launch a new tab to the extension's homepage with instructions.

Privacy notice
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This extension does not collect any personal data.

Permissions
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bookmarks - needed to search the bookmarks for the mCoffee and associated folders
tabs - needed to check that the url is not already opened, and to launch a new tab

Credits
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Icon for versions prior to 1.4.1 is from http://icongal.com/gallery/icon/34007/128/coffee_cup_breakfast_mocca