Add documentation for json component #4349
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WalkthroughThe pull request enhances the documentation for the Changes
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🧹 Outside diff range and nitpick comments (1)
components/http_request.rst (1)
271-290: Excellent addition to handle missing JSON keys!This example effectively addresses the PR objective by demonstrating how to check for the existence of a key in a JSON response, which can help prevent null pointer exceptions. The code is well-structured and includes appropriate error handling and logging.
A few suggestions for improvement:
- Consider using a variable for the key name (e.g.,
const char* key_to_check = "vol";) to make the example more generic and easier to adapt.- Enhance the error logging to include more context, such as:
This would provide more information for debugging purposes.ESP_LOGD("csm", "Key '%s' not found in JSON: %s", key_to_check, body.c_str());Would you like me to provide an updated version of the example incorporating these suggestions?
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components/http_request.rst (1)
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**: - Do not generate or add any sequence diagrams
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ChadMatsalla
changed the title
It says to avoid `containsKey` because of the Null Object Pattern.
New documentation for json:
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Actionable comments posted: 2
🧹 Outside diff range and nitpick comments (3)
components/json.rst (3)
57-64: Add error handling to the JSON building example.The current example doesn't demonstrate proper error handling or type safety.
Consider enhancing the example:
Building JSON in a lambda:: on_...: - http_request.post: url: https://esphome.io json: |- + // Safely convert sensor state to JSON + if (!id(my_sensor).has_state()) { + ESP_LOGW("custom", "Sensor has no state"); + return; + } root["key"] = id(my_sensor).state; root["greeting"] = "Hello World"; + // Optional: Add timestamp + root["timestamp"] = millis();
17-46: Simplify the complex example for better readability.While comprehensive, the current complex example might be overwhelming for users new to JSON. Consider providing a more ESPHome-specific example.
Replace with a more relevant example:
-Example 1: Relatively complex JSON:: +Example 1: Typical ESPHome JSON:: { - "first_name": "John", - "last_name": "Smith", - "is_alive": true, - "age": 27, + "device": { + "name": "Living Room Sensor", + "id": "living_room_01" + }, + "sensors": { + "temperature": 23.5, + "humidity": 45.2, + "motion": true + }, + "status": { + "wifi_signal": -67, + "uptime": 3600, + "last_update": "2024-10-15T14:30:00Z" + } - "address": { - "street_address": "21 2nd Street", - ...
1-69: Add missing sections for complete documentation.The documentation is missing several important sections that would make it more comprehensive and useful.
Consider adding these sections:
- Configuration variables (if any)
- Lambda functions and callbacks available
- Integration examples with other ESPHome components
- Troubleshooting guide
- See also section linking to related components (like http_request)
Would you like me to help draft content for these additional sections?
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ChadMatsalla
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🧹 Outside diff range and nitpick comments (2)
components/json.rst (2)
14-21: Consider improving the specification link formatting.The specification link should be formatted using RST's link syntax for better consistency and maintainability.
-https://ecma-international.org/wp-content/uploads/ECMA-404_2nd_edition_december_2017.pdf +`ECMA-404 JSON Specification <https://ecma-international.org/wp-content/uploads/ECMA-404_2nd_edition_december_2017.pdf>`_
61-91: Consider enhancing the code comments for better clarity.While the example effectively demonstrates key existence checking, the comments could be more descriptive.
lambda: |- json::parse_json(body, [](JsonObject root) -> bool { if (root["vol"]) { id(player_volume).publish_state(root["vol"]); return true; } else { - ESP_LOGD(TAG,"No 'vol' key in this json!"); + ESP_LOGD(TAG, "Warning: 'vol' key not found in JSON response"); return false; } });
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- components/http_request.rst (2 hunks)
- components/json.rst (1 hunks)
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components/json.rst (1)
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🪛 GitHub Check: build
components/json.rst
[failure] 1-1:
File does not end with a newline, please add an empty line at the end of the file.
[failure] 100-100:
Directive 'code-block' must be indented with 4 spaces, not 5. See components/json.rst:100
🔇 Additional comments (2)
components/json.rst (2)
1-13: LGTM! Well-structured introduction with practical context.The SEO metadata and introduction effectively communicate the component's purpose and practical applications.
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[failure] 1-1:
File does not end with a newline, please add an empty line at the end of the file.
22-60: LGTM! Clear and comprehensive examples.The examples effectively demonstrate both simple and complex JSON structures.
| return true; | ||
| } | ||
| else { | ||
| ESP_LOGD(TAG,"No 'vol' key in this json!"); |
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Not entirely correct as a 0 value will return false in the above check
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⛔ Files ignored due to path filters (1)
images/json.svgis excluded by!**/*.svg
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index.rst(1 hunks)
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index.rst (1)
Pattern **: - Do not generate or add any sequence diagrams
| @@ -172,6 +172,7 @@ ESPHome-specific components or components supporting ESPHome device provisioning | |||
| Improv via BLE, components/esp32_improv, improv.svg, dark-invert | |||
| Improv via Serial, components/improv_serial, improv.svg, dark-invert | |||
| Interval, components/interval, description.svg, dark-invert | |||
| JSON, components/json, json.svg, dark-invert | |||
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💡 Codebase verification
Documentation path needs correction in index.rst
The JSON component documentation exists at components/json.rst, but the index entry references it as components/json. Update the path to match the actual file location:
- Line 175: Change
JSON, components/json, json.svg, dark-inverttoJSON, components/json.rst, json.svg, dark-invert
🔗 Analysis chain
LGTM! The JSON component entry is well-placed.
The addition follows the correct format and maintains alphabetical ordering in the ESPHome Components section.
Let's verify the referenced files exist:
The previous results showed that while the icon exists at images/json.svg, we didn't find the exact path components/json.rst. Let's check both the directory and direct file to understand the documentation structure better.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Verify the existence of the JSON component documentation and icon files
# Test 1: Check if the component documentation file exists
fd --glob "components/json.rst"
# Test 2: Check if the icon file exists
fd --glob "json.svg" images/
Length of output: 76
Script:
#!/bin/bash
# Let's verify if the components/json directory exists and check its contents
fd --glob "components/json/*"
# Also check if there's a json.rst file directly under components
fd --glob "json.rst" components/
Length of output: 84
Description:
Add docs for json component. Include checking for keys as absent keys produce very difficult stack traces.
Checklist:
I am merging into
nextbecause this is new documentation that has a matching pull-request in esphome as linked above.or
I am merging into
currentbecause this is a fix, change and/or adjustment in the current documentation and is not for a new component or feature.Link added in
/index.rstwhen creating new documents for new components or cookbook.