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bool -> bit for req_init flags #739

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clholgat
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@clholgat clholgat commented Dec 5, 2024

#662

Summary by CodeRabbit

  • New Features

    • Enhanced the communication method to transmit flags as single bits, improving data efficiency.
  • Documentation

    • Updated comments to clarify the expectation of bit representation for flags in the API.

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coderabbitai bot commented Dec 5, 2024

Walkthrough

The changes made in the pull request focus on the cnf_line_API6 method of the Communication class in the communication.py file. The primary modification involves the handling of the flags parameter, where the method now converts the integer value of flags into a single bit representation before appending it to the data bytearray. This ensures that only a single bit is transmitted, aligning with the API's expectation of receiving bits rather than integer values. Comments have also been updated for clarity.

Changes

File Path Change Summary
src/main/python/main/ayab/engine/communication.py Modified cnf_line_API6 method to handle flags as a single bit instead of an integer; updated comments for clarity.

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant Communication
    participant Device

    Client->>Communication: Call cnf_line_API6(line_number, color, flags, line_data)
    Communication->>Communication: Convert flags to single bit
    Communication->>Device: Send data with single bit flags
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sonarqubecloud bot commented Dec 5, 2024

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Actionable comments posted: 0

🧹 Outside diff range and nitpick comments (1)
src/main/python/main/ayab/engine/communication.py (1)

Line range hint 177-188: Consider enhancing the flags parameter documentation.

The docstring could be more explicit about the flags parameter being converted to a single bit. Consider adding:

          flags (int): The flags sent to the controller.
+                     Note: This value is converted to a single bit (0 or 1)
+                     to match the protocol requirements.
📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Reviewing files that changed from the base of the PR and between 4bc241c and 5960540.

📒 Files selected for processing (1)
  • src/main/python/main/ayab/engine/communication.py (1 hunks)
🔇 Additional comments (1)
src/main/python/main/ayab/engine/communication.py (1)

189-192: LGTM! Clean implementation of bool to bit conversion.

The implementation correctly converts the flags parameter to a single bit representation as expected by the API. The added comments clearly explain the rationale.

Let's verify if other methods in the codebase follow similar bit-level precision for flags:

✅ Verification successful

Implementation is correct and consistent with the codebase

The verification shows that:

  • The bit conversion is used exclusively in this method, which is appropriate as it's specifically for API6 protocol communication
  • The test cases (test_communication.py, test_communication_mock.py) confirm the flags parameter is used correctly in the protocol
  • The control layer (control.py) properly sets the flag as a boolean value before passing it to cnf_line_API6
  • The implementation maintains protocol compatibility as evidenced by the existing test cases
🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Search for other flag-related operations in the codebase
rg -B 2 -A 2 "flags.*0b[01]|[01]b.*flags" --type python

# Search for protocol-related documentation
fd -e md -e txt -e rst | xargs rg -l "protocol.*flag|flag.*protocol"

Length of output: 159


Script:

#!/bin/bash
# Search for other flag-related operations in the codebase without file type restriction
rg -B 2 -A 2 "flags.*0b[01]|[01]b.*flags"

# Search for similar bit operations in the communication module
rg -B 2 -A 2 "append.*0b" src/main/python/main/ayab/engine/communication.py

# Look for protocol documentation
fd "protocol|README" -e md -e txt -e rst

# Check other usages of cnf_line_API6
rg "cnf_line_API6" -A 5 -B 5

Length of output: 8875

@jpcornil-git
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jpcornil-git commented Dec 5, 2024

Not sure why this is required, boolean is (a subclass of) int already

>>> help(bool)
Help on class bool in module builtins:

class bool(int)
 |  bool(x) -> bool
 |  
 |  Returns True when the argument x is true, False otherwise.
 |  The builtins True and False are the only two instances of the class bool.
 |  The class bool is a subclass of the class int, and cannot be subclassed.
...

=> proposed change is replacing an integer by an integer of the same size (0b is only a formater)

If you really want to control the conversion to byte, you should use something like

data.extend(flag.to_bytes(byteorder='little', length=1))

... but this is not required as it is done already within the append method of the bytearray object that takes an int as input.

What issue # are we trying to solve here btw ?

Note that this change also limit usage of flags to a single bit => L167 & 178 should also be modified to indicate bool iso int and flags should probably be renamed flag or lastrow or ... to make the interface unambiguous.

@jonathanperret
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I made a release from this PR if anyone wants to test: https://github.com/jonathanperret/ayab-desktop/releases/tag/1.0.0-never-end-1

I couldn't reproduce #662 and I still can't with this build, but it does not seem to have broken anything either.

@dl1com
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dl1com commented Dec 13, 2024

Issue #662 fixed by #740

@dl1com dl1com closed this Dec 13, 2024
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4 participants