store and write proxy config to wp-config.php

[Thanhphan1147]

During _reconciliation the charm checks if the themes and plugins currently installed matches the expected themes and plugin. If there are some missing the charm will then download them from https://wordpress.org. Behind the scene it runs wp theme|plugin install and If the charm is deployed behind a proxy and the proxy information is not present in wp-config.php this command will fail, leaving the charm in a blocked state.

This PR addresses that issue by fetching the proxy information from juju model-config and populate the proxy-config attribute of the charm state so that the values can be added to wp-config.php during reconciliation.

Checklist

• The charm style guide was applied
• The contributing guide was applied
• The changes are compliant with ISD054 - Managing Charm Complexity
• The documentation is generated using src-docs
• The documentation for charmhub is updated.
• The PR is tagged with appropriate label (urgent, trivial, complex)

[amandahla]

Could you fill the PR description please? Out of curiosity: whats the impact if the proxy is not reachable? Is Wordpress still up?

[Thanhphan1147]

Hi, Thanks for the notice, I have updated the PR description with relevant information. Basically wordpress will be in a blocked state if the plugins|themes cannot be installed

[jdkandersson]

Technically the checkbox for " The PR is tagged with appropriate label (urgent, trivial, complex)" is checked though the PR is not labelled with any of those tags, could that please be resolved?

[github-actions]

Test coverage for 7c08317

Name                Stmts   Miss Branch BrPart  Cover   Missing
---------------------------------------------------------------
src/charm.py          546     41    180     32    89%   191-194, 358-359, 418->422, 571, 602, 608, 653, 688-689, 740-747, 752, 854->859, 858, 860, 865-866, 926, 944, 951, 1041, 1050, 1062, 1083, 1092, 1111, 1115, 1144, 1197, 1329, 1351, 1358->1360, 1403->exit, 1415, 1431, 1468, 1477-1478
src/cos.py             15      0      0      0   100%
src/exceptions.py      17      1      2      1    89%   41
src/state.py           34      0      4      0   100%
src/types_.py          16      0      0      0   100%
---------------------------------------------------------------
TOTAL                 628     42    186     33    90%

Static code analysis report

Run started:2023-11-28 16:52:15.068250

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 4428
  Total lines skipped (#nosec): 1
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):

[amandahla]

LGTM

[Thanhphan1147]

Technically the checkbox for " The PR is tagged with appropriate label (urgent, trivial, complex)" is checked though the PR is not labelled with any of those tags, could that please be resolved?

I labelled the PR appropriately, I also removed the bug label put by mistake