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Allow base64_encode filter to accept bytes as input #39097

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@Petro31 Petro31 commented May 19, 2025

Proposed change

Allow base64_encode to support bytes. Currently there is a gap in HA when converting HEX strings (common) to base64. This is typically need for remotes like broadlink and other aspects of HA that require base64 strings.

If a user attempts to convert a hex string to base64, they have to know quite a bit about encoding. Which isn't easy.

This PR is phase1 of a 2 updates. This update specifically just allows base64_encode to accept bytes as an input.

Phase 2 -> home-assistant/core#145229

This proposal changes this template:

{{ (int('0F010003', base=16) | pack(">I")).decode('utf-8') | base64_encode }}

To this:

{{ '0F010003' | fromhex | base64_encode }}

Which will easily work with hex strings.

Type of change

  • Spelling, grammar or other readability improvements (current branch).
  • Adjusted missing or incorrect information in the current documentation (current branch).
  • Added documentation for a new integration I'm adding to Home Assistant (next branch).
  • Added documentation for a new feature I'm adding to Home Assistant (next branch).
  • Removed stale or deprecated documentation.

Additional information

Checklist

  • This PR uses the correct branch, based on one of the following:
    • I made a change to the existing documentation and used the current branch.
    • I made a change that is related to an upcoming version of Home Assistant and used the next branch.
  • The documentation follows the Home Assistant documentation standards.

Summary by CodeRabbit

  • Documentation
    • Updated templating documentation to include the new base64_encode string filter, with example usage for encoding strings to base64.

@home-assistant home-assistant bot added has-parent This PR has a parent PR in a other repo next This PR goes into the next branch labels May 19, 2025
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coderabbitai bot commented May 19, 2025

📝 Walkthrough

Walkthrough

The templating documentation was updated to include information and example usage for a new base64_encode string filter, which encodes input into a base64 string. The documentation now clarifies how to use this filter within templates, while existing content about base64_decode remains unchanged.

Changes

File(s) Change Summary
source/_docs/configuration/templating.markdown Added documentation and example for the new base64_encode string filter in template usage.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant TemplateEngine

    User->>TemplateEngine: Provide template with 'base64_encode' filter
    TemplateEngine->>TemplateEngine: Encode input using base64
    TemplateEngine-->>User: Return base64-encoded string
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Actionable comments posted: 0

🧹 Nitpick comments (2)
source/_docs/configuration/templating.markdown (2)

1177-1181: Refine filter description for clarity and consistency
The new entry correctly states that base64_encode accepts strings and bytes. To align with the style of other filter descriptions (using past participles and “Base64” capitalized), consider rephrasing:

  • From:
    - Filter `value | base64_encode` Encodes a string or bytes to a base 64 string.
    
  • To:
    - Filter `value | base64_encode` Encodes a string or bytes to a Base64-encoded string.
    

1186-1189: Illustrate bytes support and satisfy Markdown-lint

  1. Add an example showing direct bytes input (e.g. via the fromhex filter) to demonstrate the new capability:
    {% raw %}
    - `{{ '0F010003' | fromhex | base64_encode }}` – renders as `<calculated-base64-value>`
    {% endraw %}
  2. Ensure the existing bullet list is surrounded by blank lines to satisfy MD032 (lists should be preceded and followed by a blank line).
🧰 Tools
🪛 markdownlint-cli2 (0.17.2)

1186-1186: Lists should be surrounded by blank lines
null

(MD032, blanks-around-lists)

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
Cache: Disabled due to data retention organization setting
Knowledge Base: Disabled due to data retention organization setting

📥 Commits

Reviewing files that changed from the base of the PR and between eb88953 and 45769cf.

📒 Files selected for processing (1)
  • source/_docs/configuration/templating.markdown (2 hunks)
🧰 Additional context used
🪛 markdownlint-cli2 (0.17.2)
source/_docs/configuration/templating.markdown

1186-1186: Lists should be surrounded by blank lines
null

(MD032, blanks-around-lists)

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