Please help us help you and fill where relevant:
Your LimeSurvey version: 5.6.5+230214
Own server or LimeSurvey hosting: Own server
Survey theme/template: default (?)
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Is it possible to allow participants to save the current state of the survey and reload the state *without* previously opening the correct survey?

Issue is the following: There are multiple cascaded surveys (the last page of survey 1 will redirect them to survey 2 and so on), the reason for that is that there are different start surveys for different groups of people, but the last survey is the same for all.
The problem with that is: A participant is inside survey 2 and saves the state. He later clicks the link again he received (which will lead him to survey 1) and enters his data, he'll get an error message that there is no saved state.
What I would want that he gets redirected to the correct survey and the state is loaded. Is that possible somehow?

Best regards
Stefan

Clearly not possible, even with hacked or plugin : it's better to use another system than save.
Maybe token is the best way

How would token work? The surveys are anonymous and that should be obvious for the participants. So sending participants individual tokens/links in advance is not an option.
Is there an option to generate a link/token during the survey? If you click on save it says "to continue the survey at a later point, use this link: <link> (save it to your bookmarks)". With the option to send the link via email. This would be the better option compared to username/password.

Why would hacking not be possible? I don't like that solution, because it makes updating really difficult. One could a dd another table to the database that stores the usernames and the survey ids. When a survey is saved it is checked that the username is not already in that table and then saved with the survey id. When loading a state, in case it does not match the survey, the table is checked, the correct survey is loaded and then the state is loaded. I did not yet look at source code of LimeSurvey, but depending on the software design that could need a lot modifications.

Your proposed solution didn't use default save: yes, it can be done in plugin.

Or create a token on the fly when enter the survey and (in a plugin too) : follow up to 2nd survey if 21st survey is done.

Time to construct such plugin , but can be done.

What are you referring to? My first idea or the second one?

As I have never written any plug-in for LimeSurvey (but quite a few for WordPress) I don't really know where to start. I had a look through the docs, it says "Plugins should only extend LimeSurvey via its "public" API.", is the API documented somewhere? Is there some plug-in I could use as start for what I want to do?

- www.limesurvey.org/manual/Plugins_-_advanced

- www.limesurvey.org/manual/RemoteControl_2_API

stefan_o wrote:

What are you referring to? My first idea or the second one?

This part :

> One could a dd another table to the database that stores the usernames and the survey ids. When a survey is saved it is checked that the username is not already in that table and then saved with the survey id. When loading a state, in case it does not match the survey, the table is checked, the correct survey is loaded and then the state is loaded. I did not yet look at source code of LimeSurvey, but depending on the software design that could need a lot modifications.

stefan_o wrote:

As I have never written any plug-in for LimeSurvey (but quite a few for WordPress) I don't really know where to start. I had a look through the docs, it says "Plugins should only extend LimeSurvey via its "public" API.", is the API documented somewhere? Is there some plug-in I could use as start for what I want to do?


 

A lot of sample : gitlab.com/SondagesPro/

LimeSurvey plugin are based on event, where you can do what you want or follow event guidelines (for return part)

Else : here : i think you need to use
- beforeSurveyPage (to check if loadname are in link, and this link are for this survey)
- beforeRegister (yes before …) to use your own save system

If you use only Limesurvey plugin API : you can not construct plugins … use Yii