[Date offsets] Espanso snippets to return offset date from today - various versions. #espanso #python #powershell #bash #regex #javascript #ruby

offset_date_bash.yml

# Espanso snippets to return offset date from today
# It was pointed out that my v1 didn't allow for different length months and years.
# Thanks to @StewCam on Discord https://discord.com/channels/884163483409731584/1013914627886817372/1251704970080944189
# Here are five updated versions which do.
# Pick one and type e.g.: +2w, -3m etc.

# Bash version for Linux. For macOS Bash or Zsh see the discussion below
  - regex: (?P<Offset>[+-]\d+)(?P<Unit>[dwmy])
    replace: "{{Output}}"
    label: Bash Offset date
    vars:
      - name: Output
        type: shell
        params:
          shell: bash
          cmd: |           
            case {{Unit}} in
                d) echo $(date -d "{{Offset}} days" +"%d/%m/%y") ;;
                w) echo $(date -d "{{Offset}} weeks" +"%d/%m/%y") ;;
                m) echo $(date -d "{{Offset}} months" +"%d/%m/%y") ;;
                y) echo $(date -d "{{Offset}} years" +"%d/%m/%y") ;;
            esac

offset_date_js.yml

# Javascript version
  - regex: (?P<offset>[+-]\d+)(?P<unit>[dwmy])n
    replace: "{{output}}"
    label: Node.js offset date
    vars:
      - name: output
        type: script
        params:
          args:
            - node
            - -e
            - |
              let now = new Date();           
              switch('{{unit}}') {
                case 'd': date = new Date(now.setDate(now.getDate() + {{offset}})); break;
                case 'w': date = new Date(now.setDate(now.getDate() + ({{offset}} * 7))); break;
                case 'm': date = new Date(now.setMonth(now.getMonth() + {{offset}})); break;
                case 'y': date = new Date(now.setFullYear(now.getFullYear() + {{offset}})); break;
              }
              const day = ("0" + date.getDate()).slice(-2);
              const month = ("0" + (date.getMonth() + 1)).slice(-2);
              const year = date.getFullYear().toString().slice(-2);
              console.log(`${day}/${month}/${year}`);

offset_date_pwsh.yml

# PowerShell version
  - regex: (?P<offset>[+-]\d+)(?P<unit>[dwmy])
    replace: "{{output}}"
    label: PowerShell offset date
    vars:
      - name: output
        type: shell
        params:
          shell: pwsh # Remove or comment out this line for Windows
          cmd: |
            switch ("{{unit}}") {
                "d" { $date = (Get-Date).AddDays({{offset}}).ToString("dd/MM/yy") }
                "w" { $date = (Get-Date).AddDays({{offset}} * 7).ToString("dd/MM/yy") }
                "m" { $date = (Get-Date).AddMonths({{offset}}).ToString("dd/MM/yy") }
                "y" { $date = (Get-Date).AddYears({{offset}}).ToString("dd/MM/yy") }
            }
            Write-Output $date

offset_date_pyth.yml

# Python version
  - regex: (?P<offset>[+-]\d+)(?P<unit>[dwmy])
    replace: "{{output}}"
    label: Python offset date
    vars:
      - name: output
        type: script
        params:
          args:
            - python
            - -c
            - |
              from datetime import datetime, timedelta
              from dateutil.relativedelta import relativedelta
              now = datetime.now()
              match "{{unit}}":
                  case "d": date = now + timedelta(days={{offset}})
                  case "w": date = now + timedelta(weeks={{offset}})
                  case "m": date = now + relativedelta(months={{offset}})
                  case "y": date = now + relativedelta(years={{offset}})
              print(date.strftime("%d/%m/%y"))

offset_date_ruby.yml

# Ruby version
  - regex: (?P<Offset>[+-]\d+)(?P<Unit>[dwmy])
    replace: "{{Output}}"
    label: Ruby Offset date
    vars:
      - name: Output
        type: script
        params:
          args:
            - ruby
            - -e
            - |
              require 'date'
              offset = {{Offset}}.to_i
              date = Date.today
              result = case '{{Unit}}'
                when 'd' then date + offset
                when 'w' then date + (offset * 7)
                when 'm' then date >> offset
                when 'y' then date >> (offset * 12)
              end
              puts result.strftime('%d/%m/%y')

Massive thanks for this @smeech.

The Bash version isn't working on macOS (I didn't test any of the others). It returns a blank string.

I fixed the formatting and included a prefix to reduce the chances of accidentally triggering the date offset calculation. I also simplified the code down as follows:

# Date offsets - return offset date from today
# Type e.g.: d-18d, d+2w, d-3m, d+5y etc.
- regex: d(?P<offset>[+-]\d+)(?P<unit>[dwmy])
    replace: "{{output}}"
    label: Bash offset date
    vars:
      - name: output
        type: shell
        params:
          shell: bash
          cmd: |
            date=$(date -v "{{offset}}{{unit}}" +"%d/%m/%Y")          
            echo "$date"

Massive thanks for this @smeech.

The Bash version isn't working on macOS (I didn't test any of the others). It returns a blank string.

I fixed the formatting and included a prefix to reduce the chances of accidentally triggering the date offset calculation. I also simplified the code down as follows:

# Date offsets - return offset date from today
# Type e.g.: d-18d, d+2w, d-3m, d+5y etc.
- regex: d(?P<offset>[+-]\d+)(?P<unit>[dwmy])
    replace: "{{output}}"
    label: Bash offset date
    vars:
      - name: output
        type: shell
        params:
          shell: bash
          cmd: |
            date=$(date -v "{{offset}}{{unit}}" +"%d/%m/%Y")          
            echo "$date"

Thank you. It seems the -v option is peculiar to macOS. It certainly simplifies things!