Fixed an issue with getTemplate

[djaevlen]

Hey @Log1x and thanks for updating acf-composer to v3. Massive improvement!

I just starting to testing it all out on my local and I noticed an memory issue when our Rankmath SEO plugin was generating our sitemap. If the sitemap for example has over 30 URL per page the memory gets exhausted.

I have traced it back to the this line:

acf-composer/src/Block.php

Line 464 in 21f654d

$this->template = $this->getTemplate($this->template)->toJson();

I guess with the new caching $this->template gets saved on the first built and then carried over to the next time it needs built. If you have a page with a block that are used over 3 times, then it causes a problem. $this->template simply gets converted into JSON string everytime. Even if $this->template is a string it gets encoded again into JSON.
On a single page with 10+ blocks its fine, but 30 pages with 300 blocks the $this->template gets massive. Therefore memory getting exhausted.

Here is a simple log trace here for one page:

[2024-02-29 09:54:38] development.INFO: --------start------  
[2024-02-29 09:54:38] development.DEBUG: array (
)  
[2024-02-29 09:54:38] development.INFO: $this->template is an array  
[2024-02-29 09:54:38] development.INFO: block_0570b2c5cc8bfcfdc943cec707a72885  
[2024-02-29 09:54:38] development.INFO: acf/card  
[2024-02-29 09:54:38] development.INFO: ----------------  
[2024-02-29 09:54:38] development.DEBUG: array (
)  
[2024-02-29 09:54:38] development.INFO: $this->template is an array  
[2024-02-29 09:54:38] development.INFO: block_bce403ff683e0a19cbad0345bc3dc085  
[2024-02-29 09:54:38] development.INFO: acf/cards  
[2024-02-29 09:54:38] development.INFO: ----------------   
[2024-02-29 09:54:38] development.DEBUG: []  
[2024-02-29 09:54:38] development.INFO: $this->template is a string  
[2024-02-29 09:54:38] development.INFO: block_a7854c9d55706858e5a2316efdd49e18  
[2024-02-29 09:54:38] development.INFO: acf/cards  
[2024-02-29 09:54:38] development.INFO: ----------------  
[2024-02-29 09:54:38] development.DEBUG: array (
)  
[2024-02-29 09:54:38] development.INFO: $this->template is an array  
[2024-02-29 09:54:38] development.INFO: block_4d1d827b32f857a974de99fa5b9fbfc1  
[2024-02-29 09:54:38] development.INFO: acf/content-hub  
[2024-02-29 09:54:38] development.INFO: ----------------  
[2024-02-29 09:54:39] development.DEBUG: array (
)  
[2024-02-29 09:54:39] development.INFO: $this->template is an array  
[2024-02-29 09:54:39] development.INFO: block_d9e560c6993edeb4d3c99910af4e85fa  
[2024-02-29 09:54:39] development.INFO: acf/button  
[2024-02-29 09:54:39] development.INFO: ----------------  
[2024-02-29 09:54:39] development.DEBUG: array (           <------- first time - array
)  
[2024-02-29 09:54:39] development.INFO: $this->template is an array  
[2024-02-29 09:54:39] development.INFO: block_0bb5d3dc0936f9b1fed8de9886b53def  
[2024-02-29 09:54:39] development.INFO: acf/square-container  
[2024-02-29 09:54:39] development.INFO: ----------------  
[2024-02-29 09:54:39] development.DEBUG: []                     <------- second time - string
[2024-02-29 09:54:39] development.INFO: $this->template is a string  
[2024-02-29 09:54:39] development.INFO: block_2a1170816eddc6834f86950b6d36295e  
[2024-02-29 09:54:39] development.INFO: acf/button  
[2024-02-29 09:54:39] development.INFO: ----------------   
[2024-02-29 09:54:39] development.DEBUG: []  
[2024-02-29 09:54:39] development.INFO: $this->template is a string  
[2024-02-29 09:54:39] development.INFO: block_ea4596f6c1ac8bd3ea6bc6ddc8ae127c  
[2024-02-29 09:54:39] development.INFO: acf/square-container  
[2024-02-29 09:54:39] development.INFO: ----------------  
[2024-02-29 09:54:39] development.DEBUG: [[0,"[]"]]         <------- third time - corrupted string
[2024-02-29 09:54:39] development.INFO: $this->template is a string  
[2024-02-29 09:54:39] development.INFO: block_bf3f47f7a6a47bad3bf12435cbaca750  
[2024-02-29 09:54:39] development.INFO: acf/button  
[2024-02-29 09:54:39] development.INFO: ----------------  
[2024-02-29 09:54:39] development.DEBUG: array (
)  
[2024-02-29 09:54:39] development.INFO: $this->template is an array  
[2024-02-29 09:54:39] development.INFO: block_8ef38eb7eb2dd5ecbde42f97a522bc79  
[2024-02-29 09:54:39] development.INFO: acf/logos  
[2024-02-29 09:54:39] development.INFO: ----------------  

Notice the third time "acf/button" is being used at the DEBUG line. $this->template is now [[0,"[]"]].

I have made a PR that should fix the problem of $this->template being converted recursively. If the $this->template is a string then return the string. Otherwise it should just contiune normally.

[Log1x]

thanks!