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Merge pull request #475 from cosmology-tech/fix/supported-chains
don't call experimentalSuggestChain() if it's natively supported
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| export class ExpiringLocalStorage { | ||
| /** | ||
| * Add an item to an array in local storage with an expiration time. | ||
| * @param {string} key - The key under which the array is stored. | ||
| * @param {*} value - The value to be added. | ||
| * @param {number} ttl - Time to live in milliseconds. | ||
| */ | ||
| static addItem(key, value, ttl) { | ||
| const now = new Date(); | ||
|
|
||
| // Create a new item with value and expiry | ||
| const newItem = { | ||
| value: value, | ||
| expiry: now.getTime() + ttl, | ||
| }; | ||
|
|
||
| // Get existing items from local storage | ||
| const itemStr = localStorage.getItem(key); | ||
| const items = itemStr ? JSON.parse(itemStr) : []; | ||
|
|
||
| // Add the new item to the array | ||
| items.push(newItem); | ||
|
|
||
| // Store the updated array in local storage | ||
| localStorage.setItem(key, JSON.stringify(items)); | ||
| } | ||
|
|
||
| /** | ||
| * Get all valid (non-expired) items from an array in local storage. | ||
| * @param {string} key - The key of the array to retrieve. | ||
| * @returns {Array} An array of valid items. | ||
| */ | ||
| static getItems(key) { | ||
| const itemStr = localStorage.getItem(key); | ||
|
|
||
| // If the item doesn't exist, return an empty array | ||
| if (!itemStr) { | ||
| return []; | ||
| } | ||
|
|
||
| const items = JSON.parse(itemStr); | ||
| const now = new Date(); | ||
| const validItems = []; | ||
|
|
||
| // Filter out expired items | ||
| for (let item of items) { | ||
| if (now.getTime() <= item.expiry) { | ||
| validItems.push(item.value); | ||
| } | ||
| } | ||
|
|
||
| // Update local storage with only valid items | ||
| localStorage.setItem(key, JSON.stringify(validItems.map(value => ({ | ||
| value, | ||
| expiry: items.find(item => item.value === value).expiry | ||
| })))); | ||
|
|
||
| return validItems; | ||
| } | ||
|
|
||
| /** | ||
| * Remove a specific item from the array in local storage. | ||
| * @param {string} key - The key of the array. | ||
| * @param {*} value - The value to be removed. | ||
| */ | ||
| static removeItem(key, value) { | ||
| const itemStr = localStorage.getItem(key); | ||
|
|
||
| // If the item doesn't exist, return | ||
| if (!itemStr) { | ||
| return; | ||
| } | ||
|
|
||
| let items = JSON.parse(itemStr); | ||
|
|
||
| // Filter out the item to be removed | ||
| items = items.filter(item => item.value !== value); | ||
|
|
||
| // Update local storage with the remaining items | ||
| localStorage.setItem(key, JSON.stringify(items)); | ||
| } | ||
| } | ||
|
|
||
| // Usage example: | ||
|
|
||
| // Add items with different TTLs | ||
| // ExpiringLocalStorage.addItem('myArray', 'item1', 10000); // Expires in 10 seconds | ||
| // ExpiringLocalStorage.addItem('myArray', 'item2', 20000); // Expires in 20 seconds | ||
|
|
||
| // Get all valid items (non-expired) | ||
| // console.log(ExpiringLocalStorage.getItems('myArray')); | ||
|
|
||
| // Remove a specific item | ||
| // ExpiringLocalStorage.removeItem('myArray', 'item1'); |
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