1 files changed, 75 insertions, 0 deletions
diff --git a/src/client/apis/hypothesis/HypothesisApiUtils.ts b/src/client/apis/hypothesis/HypothesisApiUtils.ts
new file mode 100644
index 000000000..f31fa60a1
--- /dev/null
+++ b/src/client/apis/hypothesis/HypothesisApiUtils.ts
@@ -0,0 +1,75 @@
+import { StrCast } from "../../../fields/Types";
+
+export namespace Hypothesis {
+    export const fetchAnnotation = async (annotationId: string) => {
+        const response = await fetch(`https://api.hypothes.is/api/annotations/${annotationId}`);
+        if (response.ok) {
+            return response.json();
+        } else {
+            throw new Error('DASH: Error in fetchAnnotation GET request');
+        }
+    };
+
+    /**
+     * Searches for annotations made by @param username that 
+     * contain @param searchKeyWord 
+     */
+    export const searchAnnotation = async (username: string, searchKeyWord: string) => {
+        const base = 'https://api.hypothes.is/api/search';
+        const request = base + `?user=acct:${username}@hypothes.is&text=${searchKeyWord}`;
+        console.log("DASH Querying " + request);
+        const response = await fetch(request);
+        if (response.ok) {
+            return response.json();
+        } else {
+            throw new Error('DASH: Error in searchAnnotation GET request');
+        }
+    };
+
+    export const fetchUser = async (apiKey: string) => {
+        const response = await fetch('https://api.hypothes.is/api/profile', {
+            headers: {
+                'Authorization': `Bearer ${apiKey}`,
+            },
+        });
+        if (response.ok) {
+            return response.json();
+        } else {
+            throw new Error('DASH: Error in fetchUser GET request');
+        }
+    };
+
+    // Find the most recent placeholder annotation created, and return its ID
+    export const getPlaceholderId = async (username: string, searchKeyWord: string) => {
+        const getResponse = await Hypothesis.searchAnnotation(username, searchKeyWord);
+        const id = getResponse.rows.length > 0 ? getResponse.rows[0].id : undefined;
+        return StrCast(id);
+    };
+
+    // Send request to Hypothes.is client to modify a placeholder annotation into a hyperlink to Dash
+    export const dispatchLinkRequest = async (title: string, url: string, annotationId: string) => {
+        const apiKey = "6879-GHmtDG_P2kmWNKM3hcHptEUZX3VMOUePkamCaOrJbSw";
+
+        const oldAnnotation = await fetchAnnotation(annotationId);
+        const oldText = StrCast(oldAnnotation.text);
+        const newHyperlink = `[${title}\n](${url})`;
+        const newText = oldText === "placeholder" ? newHyperlink : oldText + '\n\n' + newHyperlink;
+
+        console.log("DASH dispatching linkRequest");
+        document.dispatchEvent(new CustomEvent<{ newText: string, id: string, apiKey: string }>("linkRequest", {
+            detail: { newText: newText, id: annotationId, apiKey: apiKey },
+            bubbles: true
+        }));
+    };
+
+    // Construct an URL which will scroll the web page to a specific annotation's position
+    export const makeAnnotationUrl = (annotationId: string, baseUrl: string) => {
+        return `https://hyp.is/${annotationId}/${baseUrl}`;
+    };
+
+    // Extract username from Hypothe.is's userId format
+    export const extractUsername = (userid: string) => {
+        const exp: RegExp = /(?<=\:)(.*?)(?=\@)/;
+        return exp.exec(userid)![0];
+    };
+}
+\ No newline at end of file