| Conditions | 20 |
| Total Lines | 60 |
| Code Lines | 38 |
| Lines | 60 |
| Ratio | 100 % |
| Changes | 0 | ||
Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.
For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.
Commonly applied refactorings include:
If many parameters/temporary variables are present:
Complex classes like session.js ➔ updateSession often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
| 1 | View Code Duplication | import { uuid4 } from './utils/misc.js'; |
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| 47 | function updateSession(session, context = {}) { |
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| 48 | if (context.user) { |
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| 49 | if (!session.ipAddress && context.user.ip_address) { |
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| 50 | session.ipAddress = context.user.ip_address; |
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| 51 | } |
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| 52 | |||
| 53 | if (!session.did && !context.did) { |
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| 54 | session.did = context.user.id || context.user.email || context.user.username; |
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| 55 | } |
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| 56 | } |
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| 57 | |||
| 58 | session.timestamp = context.timestamp || timestampInSeconds(); |
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| 59 | |||
| 60 | if (context.abnormal_mechanism) { |
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| 61 | session.abnormal_mechanism = context.abnormal_mechanism; |
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| 62 | } |
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| 63 | |||
| 64 | if (context.ignoreDuration) { |
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| 65 | session.ignoreDuration = context.ignoreDuration; |
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| 66 | } |
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| 67 | if (context.sid) { |
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| 68 | // Good enough uuid validation. — Kamil |
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| 69 | session.sid = context.sid.length === 32 ? context.sid : uuid4(); |
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| 70 | } |
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| 71 | if (context.init !== undefined) { |
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| 72 | session.init = context.init; |
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| 73 | } |
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| 74 | if (!session.did && context.did) { |
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| 75 | session.did = `${context.did}`; |
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| 76 | } |
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| 77 | if (typeof context.started === 'number') { |
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| 78 | session.started = context.started; |
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| 79 | } |
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| 80 | if (session.ignoreDuration) { |
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| 81 | session.duration = undefined; |
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| 82 | } else if (typeof context.duration === 'number') { |
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| 83 | session.duration = context.duration; |
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| 84 | } else { |
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| 85 | const duration = session.timestamp - session.started; |
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| 86 | session.duration = duration >= 0 ? duration : 0; |
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| 87 | } |
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| 88 | if (context.release) { |
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| 89 | session.release = context.release; |
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| 90 | } |
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| 91 | if (context.environment) { |
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| 92 | session.environment = context.environment; |
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| 93 | } |
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| 94 | if (!session.ipAddress && context.ipAddress) { |
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| 95 | session.ipAddress = context.ipAddress; |
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| 96 | } |
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| 97 | if (!session.userAgent && context.userAgent) { |
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| 98 | session.userAgent = context.userAgent; |
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| 99 | } |
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| 100 | if (typeof context.errors === 'number') { |
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| 101 | session.errors = context.errors; |
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| 102 | } |
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| 103 | if (context.status) { |
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| 104 | session.status = context.status; |
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| 105 | } |
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| 106 | } |
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| 107 | |||
| 162 |