tdpeuter/2025SELab2-project-Dwengo
tdpeuter/2025SELab2-project-Dwengo
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fix(backend): Vooruitgang wordt nu enkel op basis van effectief bereikbare leerobjecten berekend.

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This commit is contained in:
Gerald Schmittinger 2025-05-14 08:45:44 +02:00
parent fe9ff5ec16
commit f3ba47eb30
1 changed files with 30 additions and 2 deletions
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32
backend/src/services/learning-paths/database-learning-path-provider.ts
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@ -62,6 +62,8 @@ async function convertLearningPath(learningPath: LearningPathEntity, order: numb
// Convert the learning object notes as retrieved from the database into the expected response format-
const convertedNodes = await convertNodes(nodesToLearningObjects, personalizedFor);
const nodesActuallyOnPath = traverseLearningPath(convertedNodes);
return {
_id: `${learningPath.hruid}/${learningPath.language}`, // For backwards compatibility with the original Dwengo API.
__order: order,
@ -71,8 +73,8 @@ async function convertLearningPath(learningPath: LearningPathEntity, order: numb
image: image,
title: learningPath.title,
nodes: convertedNodes,
num_nodes: learningPath.nodes.length,
num_nodes_left: convertedNodes.filter((it) => !it.done).length,
num_nodes: nodesActuallyOnPath.length,
num_nodes_left: nodesActuallyOnPath.filter((it) => !it.done).length,
keywords: keywords.join(' '),
target_ages: targetAges,
max_age: Math.max(...targetAges),
@ -103,6 +105,7 @@ async function convertNode(
isTransitionPossible(trans, optionalJsonStringToObject(lastSubmission?.content)) // Otherwise remove all transitions that aren't possible.
)
.map((trans, i) => convertTransition(trans, i, nodesToLearningObjects));
return {
_id: learningObject.uuid,
language: learningObject.language,
@ -174,6 +177,31 @@ function convertTransition(
}
}
/**
* Start from the start node and then always take the first transition until there are no transitions anymore.
* Returns the traversed nodes as an array. (This effectively filters outs nodes that cannot be reached.)
*/
function traverseLearningPath(nodes: LearningObjectNode[]): LearningObjectNode[] {
const traversedNodes: LearningObjectNode[] = [];
let currentNode = nodes.find(it => it.start_node);
while (currentNode) {
traversedNodes.push(currentNode);
const next = currentNode.transitions[0]?.next;
if (next) {
currentNode = nodes.find(it =>
it.learningobject_hruid === next.hruid && it.language === next.language && it.version === next.version
);
} else {
currentNode = undefined;
}
}
return traversedNodes;
}
/**
* Service providing access to data about learning paths from the database.
*/