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Merge pull request #373 from freelawproject/feat-adds-logic-to-handle…
…-download-confirmation-page feat(acms): Adds helper method to handle the Download Confirmation Page
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| function Acms() { | ||
| // Asynchronously checks the progress of the PDF link generation using a | ||
| // provided URL and authorization token. | ||
| // This function fetches data from the specified URL using a GET request with | ||
| // an Authorization header containing a Bearer token. It then parses the JSON | ||
| // response and throws an error if the request fails (status code is not 200). | ||
| // Otherwise, it returns the parsed JSON data. | ||
| // | ||
| // returns A promise that resolves to the parsed JSON data | ||
| // on success, or rejects with an error if the request fails. | ||
| async function checkProgress(url, token) { | ||
| const response = await fetch(url, { | ||
| headers: { Authorization: `Bearer ${token}` }, | ||
| }); | ||
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| const data = await response.json(); | ||
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| if (!response.ok) | ||
| throw new Error(`Error attempting to fetch with checkProgress: ${data}`); | ||
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| return data; | ||
| } | ||
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| // Asynchronously submits data to a server using a POST request. | ||
| // This function sends a POST request to the specified URL with an | ||
| // authorization token and the provided data. | ||
| // The data is expected to be a JavaScript object and will be converted | ||
| // to format before sending and The Authorization header includes a Bearer | ||
| // token for authentication. The function parses the JSON response and | ||
| // throws an error if the request fails (status code is not 200 OK). | ||
| // Otherwise, it returns the parsed JSON data. | ||
| // | ||
| // Returns A promise that resolves to the parsed JSON data on success, or | ||
| // rejects with an error if the request fails. | ||
| async function postData(url, token, body = {}) { | ||
| const response = await fetch(url, { | ||
| method: 'POST', | ||
| headers: { | ||
| Authorization: `Bearer ${token}`, | ||
| 'Content-Type': 'application/json', | ||
| }, | ||
| body: JSON.stringify(body), | ||
| }); | ||
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| const data = await response.json(); | ||
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| if (!response.ok) | ||
| throw new Error(`Error attempting to fetch with postData: ${data}`); | ||
|
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| return data; | ||
| } | ||
|
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| // This function simulates a while loop using Promises. It takes three | ||
| // arguments: | ||
| // - `input`: The initial value for the loop. | ||
| // - `condition`: A function that evaluates to true as long as the loop | ||
| // should continue. | ||
| // - `action`: A function that returns a Promise and performs the loop's | ||
| // logic for each iteration. | ||
| // | ||
| // It returns a Promise that resolves with the final `input` value when the | ||
| // `condition` function becomes false. | ||
| // | ||
| // It works by defining a recursive helper function `whilst`. This function | ||
| // checks the `condition` on the current `input`. | ||
| // - If `condition` is true, it calls the `action` function with `input`. | ||
| // The result (a Promise) is then chained with another call to `whilst`, | ||
| // effectively continuing the loop. | ||
| // - If `condition` is false, it resolves the returned Promise immediately | ||
| // with the current `input` value, signifying the end of the loop. | ||
| const promiseWhile = (input, condition, action) => { | ||
| const whilst = (input) => | ||
| condition(input) ? action(input).then(whilst) : Promise.resolve(input); | ||
| return whilst(input); | ||
| }; | ||
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| return { | ||
| // Use the ACMS API to retrieve the file GUID and compute the document URL | ||
| getDocumentURL: async function (apiUrl, token, mergePdfFilesRequest, cb) { | ||
| const url = `${apiUrl}/MergePDFFiles`; | ||
| const data = await postData(url, token, mergePdfFilesRequest); | ||
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| const statusQueryUrl = data && data.statusQueryGetUri; | ||
|
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| // Prepare elements to be used within the promiseWhile loop. | ||
| // Helper function to check if the job is completed based on a | ||
| // given status | ||
| const isCompleted = (status) => /Completed/i.test(status); | ||
| // Helper function to determine if we should continue checking | ||
| const condition = (runtimeStatus) => !isCompleted(runtimeStatus); | ||
| // Initial runtime status (empty string) | ||
| const initialRuntimeStatus = ''; | ||
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| // Function to perform a single check on the job progress | ||
| const action = (runtimeStatus) => | ||
| new Promise((resolve, reject) => { | ||
| checkProgress(statusQueryUrl, token) | ||
| .then((response) => { | ||
| // Extract the new runtime status from the response (if it exists) | ||
| const newRuntimeStatus = response && response.runtimeStatus; | ||
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| if (!newRuntimeStatus) reject('No runtime status was returned.'); | ||
|
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| // Update the output variable if the job is completed | ||
| if (isCompleted(newRuntimeStatus)) | ||
| output = response && response.output; | ||
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| resolve(newRuntimeStatus); | ||
| }) | ||
| .catch((error) => { | ||
| console.log(error); | ||
| }); | ||
| }); | ||
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| // Use promiseWhile to keep checking the status until the job is completed | ||
| let fileGuid = await promiseWhile( | ||
| initialRuntimeStatus, | ||
| condition, | ||
| action | ||
| ).then((status) => output); | ||
| cb(`${apiUrl}/GetMergedFile?fileGuid=${fileGuid}`); | ||
| }, | ||
| }; | ||
| } |
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